Milling drum with milling drum tube

Abstract

This utility model relates to a milling roller having a milling roller tube, particularly for road milling machines, wherein a lower component is fixed to the surface of the milling roller tube protruding from a tool system. At least a portion of the lower components are arranged spaced apart from each other along the circumferential direction of the milling roller tube. A filler element is arranged in the spaced area between at least a portion of the adjacent lower components. The filler element is welded to a lower component arranged along the circumferential direction of the roller before the filler element and a lower component arranged along the circumferential direction of the roller after the filler element, and to the surface of the milling roller tube. To improve the load-bearing capacity of the tool system and the filler element fixed to the milling roller, this utility model specifies that at least a portion of the filler element has a base on which at least one radially outwardly extending protrusion is molded, and the protrusion is welded to the rear side of the lower component in the circumferential direction or the front side of the lower component in the feed direction.

Description

Technical Field

[0001] This utility model relates to a milling roller with a milling roller tube for a ground milling machine, wherein a lower part is fixed to the surface of the milling roller tube protruding from the tool system, wherein at least a portion of the lower part is arranged spaced apart from each other along the circumferential direction of the milling roller tube, wherein a filling element is arranged in the gap area between a portion of the circumferentially spaced lower part, and the filling element is welded to the surface of the lower part and the surface of the milling roller tube respectively arranged in front of the filling element and arranged in the circumferential direction of the roller. Background Technology

[0002] The milling roller according to this invention is used in a ground processing machine to remove the surface to be processed. A road milling machine, for example, is used for milling road surfaces. The milling roller passes over the road surface. A tool system protruding radially outward is fixed to the milling roller. The tool system may, for example, have a lower part and a chisel holder that can be alternatively fixed therein. The chisel holder can accommodate chisels in a replaceable or non-replaceable manner. The road surface can be processed and removed by means of the chisel, such as a round bar chisel. These milling rollers are described, for example, in EP 2 411 581 B1 or EP 3 162 959 B1.

[0003] A tool system, forming a cleaning and loading auger, can be at least partially fixed and arranged on the milling roller according to the present invention. For this purpose, the tool system is arranged helically and sequentially on the surface of the milling roller tube. Preferably, multiple cleaning and loading augers can be formed on the surface of the milling roller tube. The stripped ground material is conveyed in the channel area between the cleaning and loading augers, for example, towards the axial center of the milling roller tube. A ejector can be arranged in this area. The ground material is thrown from the working area of ​​the milling roller, for example, onto a conveyor belt, by means of the ejector.

[0004] In this article, "radial" refers to the axis of rotation of the milling roller. Here, "radial" does not necessarily mean that there must be an arrangement of components precisely perpendicular to the axis of rotation of the milling roller. Rather, it describes a substantially perpendicular orientation.

[0005] In this article, "axial direction" refers to the axis of rotation of the milling roller. Here, "axial direction" does not necessarily refer to the precise axial arrangement of the components about the axis of rotation of the milling roller. Rather, it describes the orientation, which is essentially axial.

[0006] In this article, "circumferential direction" refers to the axis of rotation of the milling roller. Here, "circumferential direction" does not necessarily mean that the components must be arranged precisely along the direction of rotation of the milling roller. Rather, it describes an arrangement that is essentially along the direction of rotation.

[0007] A milling roller is known from JP H 083919 A, on which a helical tab is mounted on the surface of the milling roller. A replacement support system, namely a combination of a chisel holder and a chisel, can be mounted on the tab.

[0008] Similar to JP H 083919 A, DE 37 08 520 C1 describes a milling roller with spirally shaped teeth mounted on its surface to form a transport auger. Chisel supports can be fixed to the teeth. Furthermore, DE 37 08 520 C1 describes a variation in which metal plates are screwed onto the milling roller between chisel supports. Metal plates protruding radially onto the surface of the milling roller bridge the gap between adjacent chisel supports to aid in the transport process.

[0009] In the prior art, systems are also known in which a square infill element bridges the gap between two chisel supports to form a cleaning and loading auger. The infill element is welded to the surface of the milling roller tube and to the two chisel supports respectively. In high-power milling machines, extremely high loads sometimes occur, which can cause damage to the infill element. Utility Model Content

[0010] Therefore, the object of this invention is to provide a milling roller of the type described at the beginning, wherein the load-bearing capacity of the tool system and filling element on the milling roller is improved.

[0011] This objective is achieved by having at least a portion of the filling element have a substrate, on which at least one protrusion extending radially outward about the axis of rotation of the milling roller is molded, and the protrusion is welded to the rear side of the lower part in the circumferential direction or the front side of the lower part in the feed direction.

[0012] The inventors have discovered that the connection between the filler element and the adjacent chisel holder is subjected to high loads during machining applications. Here, the connection is formed of a weld material, which is relatively brittle and has low ductility. If an extremely high load is introduced into the tool system at this time, the load is transferred to the lower component. Here, the lower component undergoes elastic deformation, which in extreme cases can lead to weld damage.

[0013] To overcome this, the present invention proposes a protrusion that extends onto the substrate of the filler element. The protrusion is welded to an adjacent lower component. Elasticity is introduced into the filler element via the protrusion, as the filler element can elastically deform relative to the substrate. Under extreme loads, the weld connecting the protrusion and the lower component is not overloaded; instead, material stress is reduced by entering the substrate through the protrusion. This prevents the weld joint formed between the lower component and the filler element from breaking. Therefore, the milling roller according to the present invention is generally characterized by a high load-bearing capacity, which improves the performance of the milling roller.

[0014] According to a preferred variant of this invention, a front protrusion and a rear protrusion are molded on a substrate, the front and rear protrusions being arranged circumferentially spaced apart from each other, and the front protrusion is welded to a front lower component and the rear protrusion is welded to a rear lower component in the circumferential direction. Since the two lower components connected to the filling element are respectively connected to the protrusions, the load-bearing capacity is further improved. In particular, each protrusion can be configured to individually match the load state of the adjacent front or rear lower component. That is, it has been found that significantly different stress conditions occur in the connection area between the front protrusion and the front lower component or in the connection area between the rear protrusion and the rear lower component.

[0015] To avoid harmful stress peaks on the molded part, this structure can be configured such that the substrate is radially bounded by a closed surface, such that the protrusion of the front portion of the substrate arranged circumferentially has a rearward transition section, and the rearward transition section and the closed surface transition into each other via a rounded transition section, and / or the protrusion of the rear portion of the substrate arranged circumferentially has a frontward transition section, and the frontward transition section and the closed surface transition into each other via a rounded transition section. Preferably, one or more rounded transition sections can also be designed such that the cross-section of the protrusion in the connection region of the protrusion on the substrate is enlarged. This increases the resistance moment against bending.

[0016] If the transition section and closing surface on the rear side and / or the transition section and closing surface on the front side are specified to transition tangentially into each other, then abrupt changes in the continuity of the transition region between the matrix and the protrusion that may cause notch stress should be avoided.

[0017] One possible variation of this invention is that the closed surface is convex and / or concave in at least a portion of its area. This curvature can specifically affect the cross-section of the matrix and its bending and tensile strength. A concave curvature causes a weakening of the cross-section. A convex curvature causes an increase in the cross-section. Due to the use of curvature and the absence of abrupt changes, a continuous cross-sectional transition is formed, which improves load-bearing capacity.

[0018] Another preferred variant of the present invention may be designed such that the front protrusion and / or the rear protrusion have a head region in the radially outer direction, the head region being coupled to the base via a bottom region, and the protrusion having a smaller drag torque in the bottom region than the portion of the head region of the front protrusion and / or the rear protrusion coupled to the bottom region, the drag torque being a drag torque against bending about the axis of rotation parallel to the milling roller.

[0019] One variation of this invention may feature a front protrusion having a front longitudinal edge at its radially outer end region, wherein the front longitudinal edge extends along the rotation axis of the milling roller and is connected to the front lower component by means of a weld. Alternatively or additionally, a rear protrusion may also have a rear longitudinal edge at its radially outer end region, wherein the rear longitudinal edge extends along the rotation axis of the milling roller and is connected to the rear lower component by means of a weld. The front or rear longitudinal edges are arranged away from the surface of the milling roller. This improves the support of the filler element relative to the adjacent lower component. The welded connection in the region of the longitudinal edge better transmits the generated bending force.

[0020] A particularly preferred variant of this invention is that the front protrusion has a front transverse edge on its opposite sides, spaced apart from each other in the direction of rotation of the milling roller, and the front transverse edge is welded to the front lower part and / or the rear protrusion has a rear transverse edge on its opposite sides, spaced apart from each other in the direction of rotation of the milling roller, and the rear transverse edge is welded to the rear lower part. The inventors have discovered that a triaxial stress state occurs during machining applications, in which torsional loads, in particular, also occur in the transition region between the lower part and the filler element. To take this into account, according to this invention, the protrusion is welded to the adjacent lower part on its opposite side in the region of the front or rear transverse edge. This significantly improves the torsional strength of the connection.

[0021] In this case, it is preferably specified that the spacing between the front lateral edges and / or the rear lateral edges along the axis of rotation of the milling roller and in the connection area of ​​the filling element on the surface of the milling roller is at least 0.4 to 1.0 times the width of the corresponding lower component in that direction and in the connection area of ​​the lower component on the surface of the milling roller. This design is particularly suitable for the application of milling rollers in road milling machines. Especially in this case, when the spacing between the front lateral edges and / or the rear lateral edges is substantially (preferably with a deviation of no more than 10%) equivalent to the width of the corresponding lower component in the connection area of ​​the lower component on the surface of the milling roller, the milling roller is simplified in manufacturing.

[0022] Preferably, the distance between the front lateral edge and the rear lateral edge along the rotation axis of the milling roller is the same. In this case, the filler element is simply manufactured as a forging. It is also conceivable that the filler element is simply manufactured as a stamping part produced by the sheet metal cutting section or as a combustion part produced by the sheet metal cutting section.

[0023] Particularly preferably, the distance between the front lateral edges and / or the rear lateral edges along the axis of rotation of the milling roller is at least 30 mm and at most 80 mm. It has been found that structures with a distance between the front lateral edges and / or the rear lateral edges of at least 55 mm and at most 60 mm are particularly durable.

[0024] Additionally or alternatively, the length of the filler element may be specified to be at least 40 mm and at most 140 mm. Preferably, the length of the filler element may be specified to be at least 55 mm and at most 75 mm.

[0025] The length of the filler element is understood as the extension of the filler element in the circumferential direction of the milling roller.

[0026] According to a preferred variant of the present invention, at least one protrusion is defined by a top section on its side opposite to the milling roller, and the top section extends at least 15 mm in the circumferential direction of the milling roller. In this way, sufficient weld width can be achieved in the region of the top section to securely connect the protrusion in the region of the top section to the immediately following lower component.

[0027] Preferably, the weld can extend along the entire length of the top section in the circumferential direction of the milling roller. This achieves a stress-optimized transition between the protrusion and the immediately following lower component.

[0028] A particularly preferred variant of this invention may be that the ratio of the length of the filling element in the circumferential direction of the milling roller, preferably in the connecting area of ​​the filling element on the surface of the milling roller, to the length of the lower component in the circumferential direction of the milling roller, preferably in the connecting area of ​​the lower component on the surface of the milling roller, is selected to be in the range of 0.4-1.4, preferably in the range of 0.55-0.75.

[0029] In this invention, the portion of the front protrusion extending radially beyond the base is greater than the portion of the rear protrusion extending radially beyond the base. This achieves a load-optimized structure.

[0030] If the longitudinal edges of the front and / or rear are arranged radially retracted relative to the radially outer end of the protrusion, so that the chamfer extending in the direction of rotation is constructed in the form of a weld preparation section, then it is possible to easily manufacture welds that can withstand high loads. Attached Figure Description

[0031] The present invention will now be explained in detail with reference to the embodiments shown in the accompanying drawings. Wherein:

[0032] Figure 1 A partial perspective view shows the milling rollers used in a road milling machine;

[0033] Figure 2 A tool system with a lower part and a chisel holder is shown in a side view;

[0034] Figure 3 The view is shown from the rear perspective. Figure 1 The tool system;

[0035] Figure 4 The chisel holder is shown in a perspective front view;

[0036] Figure 5 The perspective side view shows the results according to Figure 1-3 The lower components of the tool system;

[0037] Figure 6 The view is shown from the rear perspective. Figure 5 The lower part;

[0038] Figure 7 Shown in magnified view according to Figure 1 A partial view of the milling roller;

[0039] Figure 8 The perspective view shows the changes according to Figure 7 The view;

[0040] Figure 9A perspective front view shows the method used according to Figure 1 The filling element of the milling roller; and

[0041] Figure 10 A side view shows the method used according to Figure 1 A variant of the filling element of the milling roller. Detailed Implementation

[0042] Figure 1 A partial perspective view shows a milling roller 50 for a road milling machine. As shown, the milling roller 50 has a milling roller tube 51. A tool system is fixed to the surface 52 of the milling roller tube 51. Here, the tool system preferably has at least one lower part 10 and a chisel holder 30. Preferably, the chisel holder 30 is detachably fixed to the lower part 10.

[0043] The lower components 10 are arranged spirally on the surface 52 in the circumferential direction, thus forming a cutting and cleaning spiral. The lower components 10 are fixed to the surface 52 by means of welded connections.

[0044] Advantageously, at least one ejector 53 is arranged in the middle region of the milling roller tube 51. The cutting and cleaning auger rotates helically around the periphery of the surface 52 toward the ejector 53. The material stripped by the chisel holder 30 during the machining application is transported toward the ejector 53 by means of the cutting and cleaning auger. The ejector 53 conveys the material supplied from the working area of ​​the milling roller 50 onto, for example, a conveyor belt (not shown).

[0045] The gaps between the various tool systems can be filled at least partially by means of the filling element 60. Figure 1 In the image, to illustrate more clearly, three tool systems are connected in series using filler element 60.

[0046] Naturally, multiple or all tool systems on the milling roller 50 can also be connected by means of the filling element 60.

[0047] In the current embodiment, the milling roller 50 is provided with a so-called corner ring at its longitudinal end. Multiple tool systems are arranged in succession in a row. The remaining tool systems, or at least most of the tool systems, fixed to the milling roller 50, particularly the tool systems forming the cleaning and loading auger, are preferably arranged spaced apart from each other and connected to the filling element 60.

[0048] The design and arrangement of the filler element 60 will be discussed in detail later.

[0049] Figure 1 and Figure 2 A tool system having a lower part 10 and a chisel holder 30 fixed thereon is shown.

[0050] The lower component 10 has a connecting side 11, which may preferably have a concave, curved connecting surface. The lower component 10 can be fitted onto this connecting side 11. Figure 1 The lower part 10 is suitably fixed to the convex surface 52 of the milling roller tube 50 shown in the figure, for example by means of welding.

[0051] It may be specified that the lower component 10 has a recess 12 on its side in the transition region to the connecting side 11. The recess 12 can be used to accommodate welding material to form a temporary weld.

[0052] The base 13 of the lower component 10 forms a lower connecting side 11. The base 13 has a front side 13.1 in the feed direction V and a rear side 13.2 in the feed direction V. The lower component 10 is bounded by its side surface. Figure 2 In the diagram, the feed direction V extends from left to right. The feed direction V is obtained when using the chisel holder 30 or the tool system as specified.

[0053] It may be specified that at least one shoulder 13.3 exists in the region of at least one side to form a material outlet region.

[0054] like Figure 5 As shown, the lower component 10 may have a support receiving portion 14. The support receiving portion 14 has front support surfaces 15.1, 15.2, which are arranged at least partially in front of the plug-in socket 18. The plug-in socket 18 may be introduced into the base 13 of the lower component 10 as a notch or recess.

[0055] Preferably, a retractable portion 15.3 is arranged in the area between the two front support surfaces 15.1 and 15.2, in front of the plug-in socket 18. The two front support surfaces 15.1 and 15.2 are arranged at an angle to each other, such as... Figure 6 As can be seen, this angle opens towards the upper side of the lower component 10.

[0056] The lower component 10 may also have at least one rear support surface 16.1, 16.2 in the region facing its rear side 13.2. In the current embodiment, two rear support surfaces 16.1, 16.2 are used. The rear support surfaces 16.1, 16.2 are flush with each other, and therefore arranged in a plane. However, it is also conceivable that the two rear support surfaces 16.1, 16.2 are at an angle to each other, wherein the two rear support surfaces preferably enclose an obtuse angle.

[0057] The two rear support surfaces 16.1 and 16.2 are each formed by a support section 19.3. Here, the support section 19.3 may form a portion of the protrusion 19.2. Preferably, the two protrusions 19.2 that form the support sections 19.3 are arranged transversely to the feed direction V and spaced apart from each other.

[0058] Figure 5 As shown, the two rear support surfaces 16.1 and 16.2 can also be connected to each other via a transition section 16.3. The transition section 16.3 can thus also be used to support the chisel holder 30.

[0059] Figure 5 As shown, the lower component 10 has front support surfaces 15.1 and 15.2 that transition into rear support surfaces 16.1 and 16.2 on both sides. Advantageously, a retractable portion 17 is provided between the front support surfaces 15.1 and 15.2 and the corresponding rear support surfaces 16.1 and 16.2, which can be configured as a groove. Therefore, the front support surfaces 15.1 and 15.2 are spatially separated from the rear support surfaces 16.1 and 16.2 to form a bounded support area.

[0060] Figure 10 The diagram shows a plug-in socket 18 with an extension 18.1 at its upper end. The extension 18.1 is for easily inserting the plug-in plug 44 of the chisel holder 30 (see [reference]). Figure 5 ).

[0061] An overload support area 18.4 may be provided in the area of ​​the plug-in socket 18. The overload support area 18.4 preferably has two clamping surfaces 18.5 and 18.6, which are arranged at an angle to each other. The two clamping surfaces 18.5 and 18.6 arranged on the sides can be connected by a fixing surface 18.7. The fixing surface 18.7 also extends at an angle relative to the clamping surfaces 18.5 and 18.6. Preferably, each clamping surface 18.5 and 18.6 and the fixing surface 18.7 enclose the same angle, which is preferably an obtuse angle.

[0062] When the chisel holder 30 is installed, at least a portion of the functional surfaces and functional sections of the lower component 10, especially the clamping surfaces 18.5, 18.6, the front support surfaces 15.1, 15.2, the rear support surfaces 16.1, 16.2, the widening surface 18.1, and / or the rod support surface 18.2 as explained below, may be arranged symmetrically about the longitudinal midplane of the chisel holder 30.

[0063] Preferably, the clamping surfaces 18.5, 18.6 and the fixing surface 18.7 of the overload support region 18.4 are formed by or arranged in the region of the introduction widening portion 18.1, so as to achieve a compact structure.

[0064] Figure 5 and Figure 6 It is also shown that a rod support surface 18.2 facing the front side 13.1 is formed within the plug-in socket 18. The front rod support surface 18.2 is interrupted by a recess 18.3, thus forming sub-surfaces of the front rod support surface 18.2 on both sides of the recess 18.3. The recess 18.3 can be configured in a groove shape. The recess extends from the lower side of the base 13, especially the connecting side 11, in a direction extending longitudinally toward the plug-in socket 18. A molded body (not shown), especially a clamping sleeve, or a locating pin, etc., can be accommodated in the recess 18.

[0065] The screw receiving portion 19 is introduced into the base 13 of the lower component 10 from the rear side. A fastening screw, particularly a clamping screw 20, can be screwed into the screw receiving portion 19. Figure 2 As shown.

[0066] Preferably, the entrance to the screw receiver 19 is protected in the area between the two protrusions 19.2 (see [reference]). Figure 2 A screw receiving portion 19 can be introduced into a face section 19.1, which extends laterally between two protrusions 19.2. The protrusions 19.2 are constrained facing the screw receiving portion 19 by a limiting interface 19.4. This is due to... Figure 2 As shown.

[0067] Figure 4 The structure of the chisel holder 30 is shown. As shown, the chisel holder 30 has a support body 35.

[0068] As described below, the support 35 has a chisel receiving portion 32 on the processing side including a longitudinal central axis M and a plug-in plug 44 on the opposite plug-in plug side including a plug-in plug longitudinal axis 44.2. As shown in the embodiment, the longitudinal mid-plane of the chisel holder 30 can be unfolded through the longitudinal central axis M and the plug-in plug axis 44.2.

[0069] In the processing area, a support section 33 is molded in one piece onto the support body 35. The support section is preferably configured as a protrusion or may have a protrusion. The support section 33 at least partially forms a chisel receiver 32. Preferably, the chisel receiver 32 is configured as a hole and has a longitudinal central axis M. The position of the longitudinal central axis M of the chisel receiver 32 is... Figure 2 It is shown in the figure and is formed by the axis of the hole. Alternatively, on the machining side, a cutting tip may also be provided, and in particular fixed, on the support 35.

[0070] The support section 33 forms a support surface 31 at its free end, which preferably extends radially relative to the longitudinal central axis M of the chisel receiver 32. Particularly preferably, the support surface 31 is configured to be circumferential.

[0071] The support surface 31 is used to place an anti-wear shim (not shown) for a round bar chisel. This round bar chisel is inserted into the chisel receiving portion 32 of the chisel holder 30 with its chisel shank inserted into it. Here, the anti-wear shim is arranged between the support surface 31 and the head of the round bar chisel and is arranged so that it can rotate freely about the longitudinal central axis M of the chisel receiving portion 32.

[0072] A centering protrusion 31.1 may be constructed in the region of the support surface 31. The centering protrusion 31.1 may be constructed, for example, as a surrounding ridge. The centering protrusion 31.1 is used to center the aforementioned anti-wear pad on the support surface 31. For this purpose, it may be specified that the anti-wear pad has a surrounding groove on its lower side, on its side facing the support surface 31. The centering protrusion 31.1 engages in the surrounding groove, and the lower side of the anti-wear pad rests on the support surface 31.

[0073] The support section 33 may be constructed with one or more wear marks 33.1. If multiple wear marks 33.1 are used, the wear marks are preferably arranged spaced apart from each other in the direction of the longitudinal central axis M of the chisel receiver 32, such as... Figure 4 As seen. Wear mark 33.1 can, for example, be constructed as a groove that at least partially surrounds the wear. This is in Figure 4 It is also shown in the text.

[0074] The support section 33 is connected to the support body 35 via a transition section 34. Preferably, the transition section 34 widens the support section 33 at least partially in the direction toward the support body 35.

[0075] The support 35 may have a baffle 35.1 on its front side, which is arranged at least partially before the support section 33. The baffle 35.1 may be constructed with a depression 35.2 to improve material transport and to improve the wear resistance of the chisel holder 30.

[0076] For better rigidity, the support section 33 can be coupled to the support body 35 by means of a reinforcing support 35.3. Here, the reinforcing support 35.3 can extend in the regions on both sides and / or the rear side of the support section 33, such as... Figure 4 As shown.

[0077] The chisel holder 30 is bounded by a side 35.4 in the region of its side extending from its front to its rear. The side 35.4 preferably has a frontal slope 35.5 so that the baffle 35.1 narrows in an arrowhead shape in the front region. This allows for better material discharge during operational application. The support 35 has a front member 35.6 on its front side, which preferably bounds the baffle 35.1 on the front side.

[0078] Figure 3 As can be seen, the chisel holder 30 has an ejector receiving portion 36 on the rear side. The ejector receiving portion 36 preferably has two functions.

[0079] On one hand, the ejector receiving portion 36 is used to receive the ejector tool, which provides an inlet to the chisel receiving portion 32. The ejector tool can be used to eject the chisel held in the chisel receiving portion 32 along the longitudinal central axis M of the chisel receiving portion 32.

[0080] The second function of the ejector receiver 36 is to output the waste material introduced into the area of ​​the chisel receiver 32 during operation. The waste material is output radially outward through the ejector receiver 36.

[0081] like Figure 3 It can also be seen that the ejector receiving portion 36 is limited by the two side surfaces 36.1. The ejector receiving portion 36 is also limited on the top side by the top section 36.3. Preferably, the ejector receiving portion 36 is limited not only by the two side surfaces 36.1 but also by the top section 36.3.

[0082] Preferably, the top section 36.3 is arranged parallel to the support surface 31 to achieve better output performance.

[0083] The side 36.1 of the ejector receiver 36 can transition into the contour of the chisel receiver 32 via a transition section.

[0084] Figure 3 It is shown that the ejector receiving portion 36 is in the chisel receiving portion 32. Figure 4 The visible longitudinal central axis M begins to widen radially outward.

[0085] like Figure 4 As shown, the support body 35 has a support section 40, which is constructed on the lower side of the chisel holder 30. The support body 40 has two front stripping surfaces 41.1 and 41.2. The front stripping surfaces 41.1 and 41.2 are arranged on both sides of the longitudinal intermediate plane of the chisel holder 30. Preferably, as shown, the front stripping surfaces 41.1 and 41.2 are arranged sideways on the side of the chisel holder 30 corresponding to the stripping surfaces, next to the longitudinal intermediate plane and not penetrating the longitudinal intermediate plane.

[0086] It is conceivable that the two front stripping surfaces 41.1 and 41.2 are connected to each other by means of supplementary surface 42. Supplementary surface 42 penetrates the longitudinal intermediate plane.

[0087] The front stripping surfaces 41.1 and 41.2 surround the transverse support angle α, as shown. Figure 5 As shown. Preferably, the angle α is in the range of 100° and 120°. The angle bisector of the angle α is preferably located in the longitudinal midplane.

[0088] As shown in the figure, a plug-in connector 44 is arranged on the lower side of the chisel holder 30, preferably molded in one piece. The front stripping surfaces 41.1 and 41.2 are arranged at least partially in the feed direction before the plug-in connector 44. This is in Figure 4 As shown in the image.

[0089] The support section 40 also has at least one rear stripping surface 43.1, 43.2. In the illustrated embodiment, two rear stripping surfaces 43.1, 43.2 are used, which are located in a plane and arranged at least partially perpendicular to the longitudinal intermediate plane and spaced apart from each other. The two rear stripping surfaces 43.1, 43.2 form longitudinal support angles with respect to the front stripping surfaces 41.1, 41.2 corresponding to the sides of the chisel holder 30, respectively.

[0090] Figure 2 As shown, the front stripping surfaces 41.1 and 41.2 transition to the rear stripping surfaces 43.1 and 43.2 via the inclined surface 42.1, respectively.

[0091] Here, the inclined surface 42.1 extends in the regions of the two transverse edges. The transverse edge facing the front of the chisel holder 30 forms a transition between the front stripping surfaces 41.1, 41.2 and the inclined surface 42.1. The transverse edge facing the rear of the chisel holder 30 forms a transition between the inclined surface 42.1 and the corresponding rear stripping surfaces 43.1, 43.2. Therefore, the inclined surface 42.1 transitions directly into the front stripping surfaces 41.1, 41.2 or the rear stripping surfaces 43.1, 43.2. However, spaced transitions, such as those using rounded transitions, are also conceivable. See also Figure 2 The inclined surface 42.1 may form an obtuse angle with the corresponding front peeling surfaces 41.1, 41.2 and the rear peeling surfaces 43.1, 43.2. It is particularly preferred that the inclined surface forms the same angle with the front peeling surfaces 41.1, 41.2 and the rear peeling surfaces 43.1, 43.2.

[0092] The plug-in plug 44 transitions into the support 35 at its end facing the support 35 via a rod widening portion 44.1. The rod widening portion 44.1 widens the cross-section of the plug-in plug 44 toward the support 35 and at least partially in the radial direction relative to the longitudinal axis 44.2 of the plug-in plug. Preferably, the rod widening portion 44.1 is configured to surround the plug-in plug 44.

[0093] According to Figure 4 As seen in the attached figures, the rod widening portion 44.1 widens the cross-section of the plug-in plug 44.

[0094] To mount the chisel holder 30 onto the lower part 10, a plug-in plug 44 is inserted into a plug-in socket 18 with its free end. The widened portion 18.1 allows the plug-in plug 44 to be easily inserted.

[0095] The insertion movement of the plug-in type 44 into the plug-in type socket 18 is limited by the support surfaces 15.1, 15.2 at the front and 16.1, 16.2 at the rear of the lower part 10. The chisel holder 30 collides with the support surfaces 15.1, 15.2, 16.1, 16.2 with its front stripping surfaces 41.1, 41.2 or its rear stripping surfaces 43.1, 43.2.

[0096] The clamping screw 20 can be screwed into the screw receiving portion 19 of the lower part 10. Here, the clamping screw 20 abuts against the screw clamping surface of the screw receiving portion, which is located on the rear side of the plug-in plug 44. In this case, the chisel holder 30 is pulled into the plug-in socket 18. The clamping screw 20 secures the chisel holder 30 in the lower part 10. In the installed state, the stem extension 44.1 of the plug-in plug 44 is at least partially received in the introduction extension 18.1 of the lower part 10.

[0097] During machining applications, the generated machining force is guided to the lower component 10 via the chisel holder 30. In this case, the force is introduced from the front stripping surfaces 41.1, 41.2 and the rear stripping surfaces 43.1, 43.2 of the chisel holder 30 to the front support surfaces 15.1, 15.2 and the rear support surfaces 16.1, 16.2 of the lower component 10.

[0098] As the tool is used over time, the front stripping surfaces 41.1, 41.2 and the rear stripping surfaces 43.1, 43.2 and / or the front support surfaces 15.1, 15.2 and the rear support surfaces 16.1, 16.2 may wear down. Consequently, the chisel holder 30 shifts relative to the lower part 10. Ample space is provided by using the inclined surface 42.1 opposite the lower part 10 in the area of ​​the retraction portion 17 (see...). Figure 2This provides additional space to compensate for wear. Therefore, the chisel holder 30 can also be reliably and as specified supported on the support surfaces 15.1, 15.2 at the front and 16.1, 16.2 at the rear of the lower component 10.

[0099] As described above, adjacent tool systems can be connected to each other using filling elements 60. This allows for... Figure 7 and Figure 8 This can be seen from the text.

[0100] As shown in the accompanying drawings, the tool system is welded to the surface 52 of the milling roller 50 via its lower component 10. For this purpose, a weld 70 is applied in the transition region between the connecting side 11 and the surface 52 of the milling roller tube 51. Here, the weld 70 extends along the side of the lower component 10.

[0101] The lower components 10 are arranged spaced apart from each other along the circumferential direction of the milling roller 50. Filler elements 60 are arranged in the gap area between the two lower components 10.

[0102] Figure 9 The design of the filling element 60 is shown in the figure. As shown in the figure, the filling element 60 has a base 60.1. The base 60.1 has a lower mounting surface 61. The mounting surface 61 is preferably constructed in a concave curve. The curved portion of the mounting surface 61 is designed to complement the curved portion of the convex surface 52 of the milling roller tube 51.

[0103] However, it is also conceivable that the base 60.1 has two or more spaced-apart support elements that stand upright on the surface 52 of the milling roller 50. Preferably, the filler element 60 can be welded to the surface 52 of the milling roller 50 in the region of the support elements. Particularly preferably, at least two support elements are used, which extend from the underside of the base 60.1 opposite to the protrusions 63, 68, wherein it is preferably specified that the support elements extend along the entire width of the filler element 60 in the direction of the rotation axis of the milling roller 50.

[0104] The base 60.1 is defined on its side by a side surface 64. The side surface 64 extends substantially along the circumferential direction of the milling roller 50 when mounted on the milling roller 50. Preferably, the side surface 64 is oriented radially or substantially radially relative to the axis of rotation of the milling roller tube 51, and is arranged particularly perpendicular to the surface 52.

[0105] A base edge 61 is constructed in the transition region between the side surface 64 and the mounting surface 61, and the base edge is oriented in the circumferential direction of the milling roller 50.

[0106] like Figure 9As shown, the filling element 60 has a front protrusion 65 in the region of its front side 62. Preferably, the front limiting interface defines the front side of the substrate 60.1 and the front side of the protrusion 65. Preferably, the front limiting interface is configured as a plane, such as... Figure 9 As shown.

[0107] The front protrusion 65 is molded onto the base 60.1 in one piece and extends radially outward over the base 60.1.

[0108] In this document and in the context of this patent application, "radial" does not refer to a precise radial arrangement of the components relative to the axis of rotation of the milling roller 50. Rather, it should describe a substantially radial orientation.

[0109] The protrusion 65 is bounded at its radially outer end by a top section 66. The top section 66 forms a plane, which is preferably configured to be right-angled and has an extension along the axis of rotation of the milling roller 50, which is greater than the circumferential extension of the top section 66.

[0110] The protrusion 65 forms a rear transition section 69.3 on the side facing the rear side 63 of the filling element 60. The transition section may be at least partially configured as a concave surface and may form a rounded transition section 69.5.

[0111] like Figure 9 Preferably, the filling element 60 may have a rear protrusion 67 in the region of its rear side 63. Preferably, the rear limiting interface defines the rear side of the substrate 60.1 and the rear side of the protrusion 67. Preferably, the rear limiting interface is configured as a plane, such as... Figure 9 What I saw.

[0112] The rear protrusion 67 is molded onto the base 60.1 in one piece and extends radially outward over the base 60.1.

[0113] The protrusion 67 is bounded at its radially outer end by a top section 68. The top section 68 forms a plane, which is preferably constructed at right angles and has an extension along the axis of rotation of the milling roller 50, which is greater than the circumferential extension of the top section 66.

[0114] The rear protrusion 67 forms a front transition section 69.1 on the side facing the front side 62 of the filling element 50. The transition section may be at least partially configured as a concave surface and may form a rounded transition section 69.4.

[0115] like Figure 9 As can be seen, the two shoulders 65 and 67 are arranged spaced apart from each other. Preferably, the rear transition section 69.3 and the front transition section 69.1 face each other.

[0116] like Figure 9 As shown, the substrate 60.1 may have a closed surface 69.2 on its upper side opposite to the mounting surface 61. Preferably, the closed surface 69.2 of the substrate 60.1 is concave and may have or form a recess 69. Preferably, the closed surface 69.2 of the upper part of the substrate 60 is concave. It is conceivable that the upper closed surface 69.2 is implemented in the shape of a rounded portion. To ensure a stable construction, the rounded portion is preferably implemented with a radius of not less than 10 mm. The rear transition section 69.3 and / or the front transition section 69.1 transition into the closed surface 69.2 via rounded transition portions 69.5, 69.4.

[0117] The filling element 60 has two front lateral edges 62.1 in the region of the longitudinal end of the side surface 64, in the region of the front side 62, and two rear lateral edges 63.1 in the region of the rear side 63. The lateral edges 62.1 and 63.1 preferably extend radially outward in the regions of the protrusions 65 and 67, such as... Figure 9 As shown.

[0118] In addition, such as Figure 9 As shown, the front protrusion 65 may have a front longitudinal edge 66.1 in the region of its top section 66. Additionally, the rear protrusion 67 has a rear longitudinal edge 68.1 in the region of its top section 68. The longitudinal edges 66.1 and 68.1 extend in the direction of the rotation axis of the milling roller 50.

[0119] Figure 7 As shown, the filling element 60 rests with its front side 62 against the rear side 13.2 of the lower part 10 arranged in front of the corresponding filling element 60.

[0120] Furthermore, the filler element 60 rests against the front side 13.1 of the adjacent lower part 10 in the region of its rear side 63. The filler element 60 is fixed using a material connection, preferably a welded connection.

[0121] In order to fix the filler element 60 to the surface 52 of the milling roller tube 51, the weld 70 is preferably constructed continuously in the region of the base edge 61.1.

[0122] To secure the filler element 60 to the lower front member 10, welds are constructed in the regions of the longitudinal edge 66.1 and the two transverse edges 62.1 of the front portion between the lower member 10 and the filler element 60. Here, the welds are guided as far as possible through the regions of the transverse edges 62.1 to the top section 66. The welds in the regions of the longitudinal edges 66.1 preferably extend over the entire width of the top section 66.

[0123] To secure the filler element 60 to the lower rear member 10, welds are constructed in the regions of the rear longitudinal edge 68.1 and the two rear transverse edges 63.1 between the lower member 10 and the filler element 60. Here, the welds are guided as far as possible through the region of the rear transverse edges 63.1 to the top section 68. The welds in the region of the rear longitudinal edge 66.1 preferably extend over the entire width of the top section 68.

[0124] exist Figure 10 A variation of the filling element 60 is shown in the side view. The same reference numerals denote the same elements as those used in the accompanying drawings. Figure 9 The same components as those in the embodiments. In this regard, to avoid repetition, please refer to the above content. Therefore, only those based on... Figure 10 The differences between the embodiments.

[0125] like Figure 10 As shown, the substrate 60.1 has a convexly curved closed surface 69.2 opposite to its mounting surface 61, which extends between two protrusions 65 and 67. The convex curve causes the cross-section of the substrate 60.1 to increase in the region between the two protrusions 65 and 67.

[0126] See Figure 10 The front protrusion 65 and / or the rear protrusion 67 may transition into the upper closed surface 69.2 via rounded transition portions 69.5 and 69.4. At least one of the protrusions 65 and 67 may be coupled to the base 60.1 via a bottom section.

[0127] The head section connects to the bottom section. A cross-sectional weakening section can be provided in the area of ​​the bottom section, for example, by means of a rounded transition section 69.5, such as... Figure 10 As shown. Therefore, the cross-section in the bottom region is smaller than that in the head region. Accordingly, the protrusion 65 has a smaller resisting moment against bending in the bottom region than in the head region. If a load is introduced into the protrusion 65 via the head region, the protrusion 65 elastically deforms in the bottom region.

[0128] See Figure 10 The two top sections 66 and 68 of the terminating protrusions 65 and 67 are provided with chamfered portions in the connecting portions of the front longitudinal edge 66.1 or the rear longitudinal edge 68.1, respectively. The chamfered portions form a weld preparation portion for accommodating welding materials.

[0129] As described in the preceding embodiments, the present invention relates to a milling roller 50 having a milling roller tube 51, wherein a lower component 10 is fixed to the surface 52 of the milling roller tube 51 extending from the tool system. At least a portion of the lower components 10 are arranged spaced apart from each other along the circumferential direction of the milling roller tube 51. In the thus obtained spaced regions, filler elements 60 are respectively arranged between at least a portion of adjacent lower components 10. The filler elements are respectively welded to the lower components 10 arranged in the circumferential direction of the roller before the filler element 60 and to the lower components 10 arranged in the circumferential direction of the roller after the filler element 60, and to the surface 52 of the milling roller tube 51. At least a portion of the filler element 60 has a base 60.1, and at least one radially outwardly extending protrusion 65, 67 is molded onto the base. The protrusions 65 and 67 are welded to the rear side 13.2 of the lower part 10 in the circumferential direction or to the front side 13.1 of the lower part 10 in the feed direction.

Claims

1. Milling drum (50) with a milling drum tube (51), wherein The lower component (10) is protruding from the tool system and fixed to the surface (52) of the milling roller tube (51). At least a portion of the lower components (10) are arranged spaced apart from each other along the circumferential direction of the milling roller tube (51). A filling element (60) is arranged in the interval region between at least a portion of the circumferentially spaced lower components (10). The filling element is respectively associated with the lower component (10) arranged along the circumferential direction of the roller before the filling element (60) and the filling element arranged along the circumferential direction of the roller. (60) The lower part (10) and the surface (52) of the milling roller tube (51) are welded together, characterized in that at least a portion of the filling element (60) has a base (60.1) on which at least one protrusion (65, 67) is molded about the axis of rotation of the milling roller (50) extending radially outward, and the protrusion (65, 67) is welded to the rear side (13.2) of the lower part (10) in the circumferential direction or the front side (13.1) of the lower part (10) in the feed direction.

2. Milling roller (50) according to claim 1, characterized in that A front protrusion (65) and a rear protrusion (67) are molded on the substrate (60.1). The front protrusion and the rear protrusion are arranged spaced apart from each other in the circumferential direction. The front protrusion (65) is welded to the lower part of the front part (10) and the rear protrusion (67) is welded to the lower part of the rear part (10) in the circumferential direction.

3. Milling roller (50) according to claim 2, characterized in that The base (60.1) is radially bounded by a closed surface (69.2), such that the front protrusion (65) of the base (60.1) arranged circumferentially has a rear transition section (69.3), and the rear transition section (69.3) and the closed surface (69.2) transition into each other via a rounded transition section. And / or the rear protrusion (67) arranged rearward on the base (60.1) in the circumferential direction has a front transition section (69.1), and the front transition section (69.1) and the closing surface (69.2) are turned into each other by a rounded transition section.

4. Milling roller (50) according to claim 3, characterized in that The rear transition section (69.3) and the closing surface (69.2) and / or the front transition section (69.1) and the closing surface (69.2) transition tangentially into each other.

5. Milling roller (50) according to claim 3 or 4, characterized in that The closed surface (69.2) is convex and / or concave in at least a portion of the region.

6. Milling roller (50) according to any one of claims 1 to 4, characterized in that The front protrusion (65) and / or the rear protrusion (67) have a head region in the radial outer region, the head region being coupled to the base (60.1) via a bottom region, and the protrusion (65, 67) has a smaller drag torque in the bottom region than the portion of the head region of the front protrusion (65) and / or the rear protrusion (67) coupled to the bottom region, the drag torque being a drag torque against bending about an axis parallel to the axis of rotation of the milling roller (50).

7. Milling roller (50) according to any one of claims 1 to 4, characterized in that The front protrusion (65) has a front longitudinal edge (66.1) at its radially outer end region, wherein the front longitudinal edge (66.1) extends along the rotation axis of the milling roller (50) and the front longitudinal edge (66.1) is connected to the front lower part (10) by means of a weld. And / or the rear protrusion (67) has a rear longitudinal edge (68.1) at its radially outer end region, wherein the rear longitudinal edge (68.1) extends in the direction of the rotation axis of the milling roller (50) and the rear longitudinal edge (68.1) is connected to the rear lower part (10) by means of a weld.

8. The milling roller (50) according to any one of claims 1 to 4, characterized in that, The front protrusion (65) has a front lateral edge (62.1) on its opposite sides, which are spaced apart from each other in the direction of rotation of the milling roller (50), and the front lateral edge (62.1) is welded to the lower part of the front (10). The rear protrusion (67) has a rear transverse edge (63.1) on its opposite sides, which are spaced apart from each other in the direction of rotation of the milling roller (50), and the rear transverse edge (63.1) is welded to the rear lower part (10).

9. Milling roller (50) according to claim 8, characterized in that The lateral edges (62.1) of the front portion and / or the lateral edges (63.1) of the rear portion are in the direction of the rotation axis of the milling roller (50) and the spacing of the filling element (60) in the connecting area on the surface (52) of the milling roller (50) is at least 0.4 to 1.0 times the width of the corresponding lower part (10) in the direction and in the connecting area on the surface (52) of the milling roller (50).

10. The milling wheel of any one of claims 1 to 4, characterized in that, At least one of the protrusions (65, 67) is limited by a top section (66, 68) on its side opposite to the milling roller (50), and the top section extends at least 15 mm in the circumferential direction of the milling roller (50).

11. Milling roller (50) according to any one of claims 1 to 4, characterized in that The portion of the front protrusion (65) that extends radially beyond the base (60.1) is greater than the portion of the rear protrusion (67) that extends radially beyond the base (60.1).

12. The milling wheel (50) according to claim 7, characterized in that The longitudinal edge (66.1) at the front and / or the longitudinal edge (68.1) at the rear are arranged radially retracted relative to the radially outer ends of the protrusions (65, 67) so that the chamfered portion extending in the direction of rotation is configured as a weld preparation portion.

13. Milling roller (50) according to any one of claims 1 to 4, characterized in that The milling rollers can be used in road milling machines.

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