DE102011009092A1 - Rotor box for a ground milling machine with guide device for milled material and ground milling machine with such a rotor box - Google Patents

Abstract

The invention relates to a rotor box (100) for a ground milling machine, in particular for a road milling machine or a trench cutter, with at least one milling drum (10) received therein for loosening and / or removing soil material. It is provided that in the interior of the rotor box (100) at least one guide device (150a / 150b) is arranged, which in cooperation with the rotating milling drum (10) conveying (IIa / IIb) of the dissolved material to be milled in the axial direction (L) of Milling roller (10) causes or at least supports such transport.
The invention further relates to a ground milling machine, in particular a road or trench cutter having at least one such rotor box (100).

Description

The invention relates to a rotor box for a ground milling machine, comprising at least one milling drum (or milling rotor) accommodated therein for loosening and / or removing soil material, according to the preamble of claim 1. The invention further relates to a ground milling machine, in particular a road milling machine or a trencher having at least one such rotor box.

It is known from the prior art, at least partially einhausen a milling drum on a ground milling machine by a so-called rotor box. In this regard, z. B. on the EP 1 070 788 A2 directed.

Such a rotor box has an ejection opening, through which the milled by the milling milled soil material (milled material) z. B. can be ejected on a wegführendes conveyor belt. Typically, this ejection opening does not extend over the entire axial length of the milling drum, so that the milled material inside or in the interior of the rotor box, for example, has to be conveyed out of the side areas to the ejection opening. In the prior art, this is done by helical or spiral (helical) arranged on the milling drum Fräsmeißelreihen such. B. from the DE 698 24 340 T2 known. The disadvantage here, however, is that it comes through this conveyance of the material to be milled inside the rotor box, especially in the presence of much material in the rotor box, a heavy wear on the milling drum and in particular on the milling bits and the Fräsmeißelhaltern, as well as on the rotor box itself.

The invention is therefore based on the object to improve the transport of milled material inside the rotor box and thereby in particular to reduce wear.

This object is achieved by a rotor box with the features of claim 1. The dependent of claim 1 claims relate to preferred and advantageous developments and refinements. The solution of the problem also extends to a ground milling machine, such as in particular on a road or trench cutter having at least one rotor box according to the invention.

The rotor box according to the invention for a ground milling machine comprises at least one milling drum accommodated at least partially therein for loosening and / or removing soil material. It is envisaged that at least one guide device is arranged in the interior of the rotor box, which, in cooperation with the rotating milling drum, effects a transport of the dissolved milled material in the axial direction of the milling drum or at least supports such conveyance.

In the context of the invention, milled material is understood to mean the soil material which has been comminuted and dissolved out by the engagement of the milling bit in the soil material. The at least one guide means serves as a passive means of transporting the dislodged milled material with the primary aim of conveying the milled material in an axial direction of the milling drum to the ejection opening of the rotor box, the energy required for conveyance being provided by the rotating milling drum ,

The rotor box according to the invention has many advantages. An advantage is z. For example, it can be seen that less wear occurs at the milling drum and at the rotor box or its wall. Another advantage is the fact that in the rotor box according to the invention, in principle, more milled material can be moved, whereby the milling performance of the ground milling machine is increased. Another advantage is the fact that due to the improved conveyance of the milled material relative to the milling drum less motor power is required to drive the milling drum (reducing the drive torque).

Specifically, the guide device is preferably formed by a plurality of guide plates, which protrude from the inner wall of the rotor box in the direction of the milling drum. In the context of the invention may also be provided a plurality of guide means, each formed of a plurality of guide plates. A guide plate is a planar component, which is particularly flat and whose thickness is small in relation to the surface area. Preferably, but not necessarily, a guide plate is formed of a sheet metal material, as the housing parts of the rotor box also.

It can preferably be provided that the guide plates are arranged obliquely with respect to the axial direction of the milling drum. This is to be understood that the plane of a guide plate intersects the longitudinal axis or the axis of rotation of the milling drum at an acute angle, as explained in more detail below in connection with the figures.

It has proven to be advantageous if the guide plates, d. H. at least some and preferably all of the guide plates belonging to the plurality are arranged parallel to one another and with uniform spacing from one another.

According to a likewise preferred embodiment, it is provided that the guide plates, ie at least some and preferably all of the guide plates belonging to the plurality, in the Side view are formed with the same or identical contour.

It can preferably be provided that the guide plates, d. H. at least some and preferably all of the guide plates belonging to the plurality are, in the side view to the milling rotor, at least roughly matched to the contour of the milling rotor or to the shape of the cutting circle. For this purpose, the guide plates, for example, at least one of the milling drum facing arcuate, in particular circular arc-shaped contour section have. This arcuate or concave contour section serves as a recess for the milling drum, so that the guide plates can be formed relatively large despite the limited space in the interior of the rotor box. Likewise, it may also preferably be provided that the guide plates in the side view have at least one straight contour section facing the milling drum. It is ideal if at least two straight contour sections are present in the guide plate, wherein the two straight contour sections in their angular position to one another are also adapted to the milling drum or the cutting circle of the milling drum. Of course, it is also possible to provide more than two straight contour sections in the manner described above on the guide plate.

According to a preferred embodiment, it is provided that the guide plates, d. H. at least some and preferably all of the guide plates belonging to the plurality are arranged in two groups, wherein the guide plates in the first group have an orientation opposite to the guide plates in the second groups. Orientation is understood to be the sense of direction (positive angle or negative angle) of the surface orientation with respect to the axial direction or with respect to the axis of rotation of the milling drum. By the proposed measure, a conveyance of the milled material can be effected in opposite axial directions, as explained in more detail below in connection with the figures.

Preferably, it may be provided that the rotor box has an ejection opening for the milled material and that the guide plates, that is, the milled plates, have the ejection opening. H. at least some and preferably all of the guide plates belonging to the plurality are arranged with respect to the milling drum on the inner wall of the rotor box opposite the ejection opening. This is roughly the area between the rotor box ceiling and the rotor box rear wall.

According to a preferred development, it is provided that the milling drum accommodated in the rotor box has, in addition to the milling tools, at least one conveying device which also causes a conveyance of the dissolved material to be milled in the axial direction of the milling drum when the milling drum is rotating or at least supports such conveyance. Preferably, the at least one conveyor, as well as the milling bits, also arranged on the outer surface of the Fräswalzengrundkörpers.

This development is based on the idea of a division of tasks between the chisels, which should accomplish the loosening and / or removal of the soil material, and the at least one conveyor, which accomplish the conveyance of the material to be milled in an axial direction of the milling drum or at least support. In particular, support means that the conveyance of the milled material in the axial direction of the rotating milling drum takes place in cooperation with the milling tools and / or the milling tool holders. In combination with the arranged in the interior of the rotor box guide means or the guide plates can be achieved in the result excellent transport of the material to be milled inside the rotor box.

As a result of this development, the following advantages also result. On the one hand, the milling bits and the milling tool holders are relieved, which leads to a significantly reduced wear. Further, the conveyance of the released milled material is improved relative to the milling drum, whereby the milling performance can be further increased. However, the improved conveyance of the milled material relative to the milling drum also means that the motor power required to drive the milling drum can be further reduced (reduction of the drive torque). This is not an exhaustive list

It is preferably provided that such a conveying device is a conveying blade with at least one conveying surface, which is arranged on the outer surface of the roller base body. Such a bucket primarily has a conveying function or transport function for the milled material. This is not precluded that the bucket may also have a milling function, for example. By additionally attached thereto a cutting bit, but which is subordinate to the promotion function.

Preferably, the conveyor blade is arranged on the outer shell of the roller base projecting outwardly, in particular in a radial direction. Preferably, a conveyor blade is welded or screwed to the roller body. It is particularly preferably provided that the conveying blade is arranged replaceably on the roller body. This interchangeability can z. B. be accomplished by a bucket change holder analogous to the replaceable cutting chisels. Furthermore, a conveying blade may be formed in one piece or in several pieces. A A bucket (or at least its blade) is in particular a forged product made of a wear-resistant metal alloy.

According to a preferred development, a plurality of conveying blades is provided, which are arranged distributed in the circumferential direction and / or in the axial direction on the outer shell of the roller base body. By a plurality of conveying blades, the transport of the material to be cut can be significantly improved and / or adapted in individual areas or lengths of the milling drum to special requirements. So z. B. the carriage in the middle section of the milling drum are set stronger than at the axial outer sections.

The concrete arrangement of the conveyor blades can be varied varied. However, outstanding work results are obtained if the conveying surfaces of the conveying blades in a defined length section of the milling drum have a different and in particular an opposite orientation than the conveying surfaces of the remaining conveying blades. An orientation of the conveying surface is understood to mean, in particular, its sense of direction (or in the case of a curved or concave surface, the directional sense of a compensating surface). In this way, a different axial conveying direction for the milled material can be accomplished in the associated length sections, as explained in more detail below in connection with the figures.

Preferably, it is also provided that the conveying blades are arranged with the same or with different orientation of the conveying surface between adjacent Fräsmeißelreihen. This will be explained in more detail below in connection with the figures.

Furthermore, it can preferably be provided that at least one conveying blade has a conveying surface, which is aligned parallel to the axial direction of the milling drum. Alternatively and / or additionally, it is provided that at least one conveying blade has a conveying surface which is aligned obliquely (that is to say in particular at an acute angle) with respect to the axial direction of the milling drum.

According to a preferred embodiment, it is provided that at least one conveying blade is likewise designed as a launcher. A launcher has the function of dropping the milled material in the radial direction of the milling drum to this z. B. eject through the ejection opening in the rotor box.

The invention will be explained in more detail by way of example with reference to the figures. They show schematically:

1 a plan view of a rotor box according to the invention with a view into the interior;

2 a sectional view through the rotor box of 1 , according to the in the 1 specified cutting path;

3 an alternative embodiment of a rotor box in a sectional view, according to the 1 specified cutting path;

4 various design options for the rotor box in the 2 or 3 arranged guide plates;

5 a plan view of a milling drum, preferably in the rotor box of 1 is used;

6 a plan view of another milling drum, preferably in the rotor box of 1 is used;

7 a plan view of another milling drum, which particularly preferably in the rotor box of 1 is used; and

8th a perspective view of a bucket, which on a milling drum according to the 3 to 4 is arranged.

1 shows a rotor box in a plan view 100 , The rotor box ceiling 110 is partially broken away to reveal the view into the interior. Inside the rotor box 100 is a milling drum 10 arranged. The milling drum 10 has a roller body 12 on, on whose outer jacket a plurality of cutting tools is arranged, which are not shown in detail. The axis of rotation of the milling drum 10 is indicated by L, over which also the axial direction of the milling drum is indicated. With 11 is the outer diameter of the milling drum formed by the Fräsmeißelspitzen 10 specified in milling a milling circle 11 ' forms, as in 2 specified. The rotor box 100 has a wall formed from a sheet metal material, which is a rotor box ceiling 110 , a rotor box rear wall (rear wall) 120 and an ejector 130 with an ejection opening 131 includes. The side wall is with 140 designated.

2 shows a section through the rotor box 100 according to the in the 1 indicated section BB, wherein the sectional plane E in the region of the ejection opening 131 runs. The milling circle (chisel engagement circle) of the outer shell of the roller body 12 attached milling chisel is with 11 ' designated. In milling operation, the milling drum rotates 10 in the specified direction R, wherein the cutting bit the soil to be removed (not shown) and take as milled material. A portion of the entrained milled material is through the ejection opening 131 ejected, which is indicated by the arrow A. Supporting this can be done on the milling drum 10 be arranged so-called launcher.

That of the milling drum 10 However, soil material (milled material) removed in the side sections must be inside the rotor box 100 to the ejector 130 be encouraged. This is done in a known manner by a spiral-like arrangement of the cutting chisels on the outer surface of the roller body 12 accomplished, as explained in more detail below, which, however, leads to heavy wear, especially on the cutting tools and the Fräsmeißelhaltern. According to the invention it is therefore provided that in the interior of the rotor box 100 a variety of newly formed guide plates 150a and 150b is arranged, that of the inner wall of the rotor box 100 in the direction of the milling drum 10 protrude, causing, in cooperation with the rotating milling drum 10 a transport of the dissolved Milling material in the axial direction L of the milling drum 10 causes or is at least supported. As a result, the wear on the milling bits and the Fräsmeißelhaltern be significantly reduced. Furthermore, the milling performance can be increased, as already explained above. Depending on the embodiment, the guide plates 150a and 150b also spatially shaped, ie not being flat. The guide plates 150a and 150b may additionally be cross-braced.

The guide plates 150a and 150b are at the ejection opening 131 arranged opposite inner wall and are preferably both on the rotor box rear wall 120 as well as at the rotor box ceiling 110 fastened, especially welded, as very good in the 2 seen. As a result, the rigidity of the rotor box construction is increased. The guide plates 150a and 150b have, for example, a vertical orientation. Alternatively, the guide plates 150a and 150b be arranged inclined in the interior.

The guide plates 150a and 150b are with respect to the longitudinal axis L of the milling drum 10 (which corresponds to the axis of rotation) arranged obliquely. The angle between the plane of a guide plate 150b and the longitudinal axis L is indicated by alpha. The guide plates 150a are arranged at the same angle but with an opposite orientation. Again 2 can also be seen, have the guide plates 150a (The same applies to the guide plates 150b ) one of the milling drum 10 facing concave contour section 151 on the formed by the Fräsmeißelspitzen outer contour ( 11 ' ) of the milling drum 10 is adjusted. Due to the design and arrangement of the guide plates shown 150a respectively. 150b can also be a Abschabeffekt for on the milling drum 10 adhering milled material be accomplished.

In a particularly preferred embodiment, the guide plates are arranged in two groups, as in FIG 1 shown, with the guide plates 150a in the first group one to the guide plates 150b in the second groups have opposite orientation. This can cause a conveyance of the material to be milled in opposite axial directions, which is indicated by the arrows IIa and IIb. In particular, the milled material can be from both side sections of the milling drum 10 targeted in the direction of the level E (level of ejection opening) promoted. Within a group are the guide plates 150a respectively. 150b surface parallel and arranged with the same spacing to each other.

3 shows an alternative embodiment for a rotor box 100 in which the rotor box ceiling 110 and the transition to the rotor box back wall 120 are formed by flat sheets. The arrangement of the guide plates 150a and 150b is essentially unchanged.

4 shows in several subfigures a. to f. various design options for the guide plates 150a and 150b in a the 2 respectively. 3 corresponding side view. An essential distinguishing feature of the various guide plates is that of the milling drum 10 (or the milling circle 11 ' ) facing contour. The in the 4 execution options shown are by no means exhaustive, but rather are intended to illustrate the different design options. In addition to pointed on the milling drum 10 (or the milling circle 11 ' ) directed embodiments, such as in the 4c and 4d , it is also possible that the milling circle 11 facing contour of the guide plates 150a / b to the rounded shape of the cutting circle 11 ' adapt. The coarsest form of adaptation succeeds with an oblique to the circumference of the milling circle 11 ' extending rectilinear formation of the milling circle facing contour of the guide plates 150a / b, as for example in 4b is specified. The extent of the adaptation can be improved by contours having at least two straight contour sections. Such embodiments are for example in the 4e and 4f shown. Alternatively, the milling circle 11 ' facing contour of the guide plates 150a / b but also rounded, ideally to the rounding of the milling circle 11 ' adapted to be trained as it is in 4a is illustrated in more detail.

In connection with the 5 to 7 are subsequently milling drums 10 which is preferred in a rotor box according to the invention 100 are used and continue the idea of the invention in an advantageous manner.

5 shows a first embodiment of such a milling drum 10 in a schematic plan view. The axis of rotation of the milling drum 10 is indicated by L, above which also the axial direction of the milling drum 10 is displayed. The direction of rotation is indicated by R. On the outer jacket of the roller body 12 the milling drum 10 In a known manner, a plurality of milling bits is mounted in a spiral-like arrangement. The spiral-like arrangement line is with 13 specified. The milling bits are not shown in detail. With 11 is the outer diameter of the milling drum formed by the Fräsmeißelspitzen 10 indicated that in milling the milling circle 11 ' (please refer 2 ).

On the outer jacket of the roller body 12 the milling drum 10 are also between the adjacent Fräszeugißelreihen, resulting from the spiral-like arrangement of the cutting tool, distributed several conveyor blades 20 arranged, which are shown in simplified form as rectangles. Shovel the conveyor 20 stand outward and in particular radially outward from the roller body 12 However, typically do not exceed the Fräsmeißelspitzen (contour 11 ).

Each bucket 20 each has a conveying surface 21 on. By means of the conveying surface 21 In the milling operation, the milled material removed from the milling cutters from the soil material to be processed can first be moved in the circumferential direction, according to arrow I. From the superposition of this movement in the circumferential direction with the rotational movement of the spiral-shaped milling cutter (due to the Fräswalzenrotation) results in a transport of the material to be cut in the axial direction L, according to the arrow II. A substantial from the conveyor blades 20 the resulting advantage over the solutions known from the prior art is less wear on the milling bits and the Fräsmeißelhaltern.

6 shows a second embodiment of such a milling drum. Notwithstanding the first embodiment of 1 are the conveyor blades 20 or their conveying surfaces 21 obliquely to the axial direction L of the milling drum 10 aligned. As a result, the conveyance of the milled material in the axial direction L can be enhanced.

7 shows a third embodiment of such a milling drum. Notwithstanding the first embodiment of 1 and to the second embodiment of the 2 the milling bits are arranged in two opposing spirals, which meet in the plane E. This is preferably the plane of the ejection opening 131 of the rotor box 100 as explained above. The conveyor blades 20a (as shown in the upper section) with respect to the conveyor blades 20b (as shown in the lower section) a different orientation (sense of direction) on. As a result, an opposite conveyance of the milled material is thus effected in the sections separated by the plane E, which is indicated by the arrows IIa and IIb. As a result, z. B. the milled material from both side sections targeted in the direction of the plane E (level of the ejection opening) are promoted. In particular, in level E can also throwers on the body 12 the milling drum 10 be arranged, the milled material through the ejection opening 131 in the rotor box 100 eject.

8th schematically shows an embodiment of a conveying blade 20 in a perspective view overlooking the Fördefläche 21 , It is preferably provided that the conveying surface 21 on a separate and especially replaceable blade 22 is formed as shown. With 23 is called a change holder.

The features explained above can also be combined with one another in other embodiments than those shown in the figures and correspondingly explained, provided that this does not result in a technical contradiction.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 1070788 A2 [0002]
• DE 69824340 T2 [0003]

Claims (18)

Rotor box ( 100 ) for a ground milling machine, in particular for a road milling machine or trencher, with at least one milling drum ( 10 ) for loosening and / or removing soil material, characterized in that in the interior of the rotor box ( 100 ) at least one guide device is arranged, which in cooperation with the rotating milling drum ( 10 ) a transport of the dissolved Milling material in the axial direction (L) of the milling drum ( 10 ) or at least supports such promotion. Rotor box ( 100 ) according to claim 1, characterized in that the guide means by a plurality of guide plates ( 150a / 150b ) formed by the inner wall of the rotor box ( 100 ) in the direction of the milling drum ( 10 ) protrude. Rotor box ( 100 ) according to claim 2, characterized in that the guide plates ( 150a / 150b ) with respect to the axial direction (L) of the milling drum ( 10 ) are arranged obliquely. Rotor box ( 100 ) according to 2 or 3, characterized in that at least a part of the guide plates ( 150a / 150b ) is arranged parallel to the surface and with uniform spacing to each other. Rotor box ( 100 ) according to one of the preceding claims 2 to 4, characterized in that the guide plates ( 150a / 150b ) are formed in the side view with the same contour. Rotor box ( 100 ) according to one of the preceding claims 2 to 5, characterized in that the guide plates ( 150a / 150b ) in the side view at least one of the milling drum ( 10 ) facing curved contour section ( 151 ) exhibit. Rotor box ( 100 ) according to one of the preceding claims 2 to 5, characterized in that the guide plates ( 150a / 150b ) in the side view at least one of the milling drum ( 10 ) facing straight contour section. Rotor box ( 100 ) according to one of the preceding claims 2 to 7, characterized in that the guide plates ( 150a / 150b ) are arranged in two groups, wherein the guide plates ( 150a ) in the first group one to the guide plates ( 150b ) in the second groups have opposite orientation. Rotor box ( 100 ) according to one of the preceding claims 2 to 8, characterized in that it has an ejection opening ( 131 ) for the milled material and that the guide plates ( 150a / 150b ) on the ejection opening ( 131 ) opposite inner wall of the rotor box ( 100 ) are arranged. Rotor box ( 100 ) according to one of the preceding claims, characterized in that the milling drum ( 10 ) has in addition to the milling chisels at least one conveying device which, when the milling drum is rotating ( 10 ) a transport of the dissolved Milling material in the axial direction (L) of the milling drum ( 10 ) or at least supports such promotion. Rotor box ( 100 ) according to claim 10, characterized in that such a conveying device comprises a conveying blade ( 20 ) with at least one conveying surface ( 21 ), which together with the milling bits on the outer shell of the roller body ( 12 ) is arranged. Rotor box ( 100 ) according to claim 10 or 11, characterized by a plurality of conveying blades ( 20 ), which in the circumferential direction and / or in the axial direction (L) distributed on the outer surface of the roller body ( 12 ) are arranged. Rotor box ( 100 ) according to one of the preceding claims 10 to 12, characterized in that the conveying blades ( 20 ) with the same or different orientation of their conveying surface ( 21 ) between adjacent rows of milling bits ( 13 ) are arranged. Rotor box ( 100 ) according to one of the preceding claims 10 to 13, characterized in that the conveying surfaces ( 21 ) of the conveyor blades in a defined length of the milling drum ( 10 ) a different orientation than the conveyor surfaces ( 21 ) of the remaining conveyor blades ( 20 ) exhibit. Rotor box ( 100 ) according to one of the preceding claims 10 to 14, characterized in that at least one conveying blade ( 20 ) a conveying surface ( 21 ) parallel to the axial direction ( 1 ) of the milling drum ( 10 ) is aligned. Rotor box ( 100 ) according to one of the preceding claims 10 to 15, characterized in that at least one conveying blade ( 20 ) a conveying surface ( 21 ), which obliquely to the axial direction (L) of the milling drum ( 10 ) is aligned. Rotor box ( 100 ) according to one of the preceding claims 10 to 16, characterized in that at least one conveying blade ( 20 ) is also designed as a thrower. Ground milling machine, in particular road or trench cutter, comprising at least one Rotor box ( 100 ) according to any one of the preceding claims.

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