EP2050875B1 - Road milling device - Google Patents

Description

The invention relates to a road milling machine according to the preamble of claim 1.

Road milling machines serve, in particular, to mill off the road surface of damaged roads. Such a milled road then serves as a substructure for a road to be renewed, on which only a new road surface is to be applied.

Road milling of the type discussed here are usually self-propelled. You can have a caterpillar or a wheel drive. The road milling machines are equipped with a milling drum, which is mounted on a transverse to the milling direction horizontal axis of rotation drivable mounted on the frame of the road milling machine. The milling drum is largely surrounded by a milling drum box. This has two opposite end faces of the milling drum associated side walls and a part-cylindrical peripheral wall which forms a part-cylindrical box casing. The milling drum box, seen in the direction of milling, has a so-called hold-down on its front side, which extends a front part of the peripheral wall. The hold-down serves to seal the milling drum box in front of the milling point where the milling drum is currently milling away the defective road surface. The hold-down is stored for this purpose flying on the Fräswalzenkasten so that it rests on the abzufräsenden defective road surface and automatically adapts to the course of the same.

From the DE 2 160 403 A1 a road milling machine is known, which has a partially extending around the circumference of the milling drum hold-down. The hold-down is connected via rigid support arms with swivel arms for moving the milling drum up and down. As a result, the hold-down device can only be moved up and down together with the milling drum. The consequence is that with an adjustment of the milling depth a center of the blank holder moves relative to the axis of rotation of the milling drum and thereby changes a gap between the hold-down and the milling drum. This can lead to unwanted accumulation of milled material in the gap.

At the time of the EP 1 522 634 A2 Known road milling the hold-down is designed as an arcuate plate which is pivotable about an axis of rotation lying in front of the milling drum. As a result, a large dead space (approximately triangular in cross-section) arises between the hold-down device and the milling roller. In this dead space collects a large amount of milled road material (milled), which is not removed with the rotating milling drum. This milled material remains in front of the milled surface and must be subsequently removed, which is often possible only manually.

The invention is an object of the invention to provide a road milling machine, in which only a minimal amount of milled material remains on the milled surface.

A road milling machine to solve this problem has the features of claim 1. As a result, the hold-down is guided radially around the milling drum. In addition, the arcuate holding-down device is height-adjustable or displaceable on an arcuate path whose center lies on the axis of rotation of the milling drum. The hold-down device is displaceable on a circular path parallel to the cylindrical surface of the milling drum, in a geometric sense rotatable or pivotable about a rotation axis corresponding to the axis of rotation of the drum. It is thus possible to adjust the height to the respective depth and to adapt to the course of abzufräsenden pavement a floating change in height of the hold-down, which in the manner of a visor on the outside partially cylindrical shell of the Fräswalzenkastens along moved and thereby overlaps the shell of the Fräswalzenkastens more or less , Due to such a hold-down no dead space is formed between the milling drum and the hold-down, because follows the course of the cylindrical milling drum by the arcuate design of the hold-down. Consequently, the milled material arising at the milling site is transported along the narrow gap between the milling drum and the hold-down device for suction behind the milling drum. This leaves only a relatively small amount of milled material on the milled surface. Above all, hardly any milled material remains after the completion of the milling process at the level between the milled surface and the remaining road surface.

It is preferably provided to design the bow-shaped hold-down in such a way that it follows a circular path which runs concentrically around the milling drum. The radius of the arcuate holddown is then on the longitudinal center axis of the milling drum. As a result, an almost equally wide gap is formed between the lateral surface of the milling drum and the bow-shaped holding-down device in the circumferential direction of the milling drum. Through this gap of equal width, the loose milled material produced during milling of the road surface is taken along in the direction of rotation of the milling drum to the rear of the milling drum due to the rotating milling drum, where the milled material is removed from the milling box.

The automatic floating height adjustment of the bow-shaped hold-down takes place by a displaceable mounting of the hold-down between opposite side walls of the milling drum box. This type of storage of the bow-shaped hold-down allows an automatic up and down of the same, so that the hold-down can automatically adapt to the course of the milled road surface.

In a preferred embodiment of the mounting of the arcuate holding-down device on the side walls, arcuate elongated holes are also provided in the side walls and / or edges of the hold-down device, in particular edge strips of the hold-down device. The arcuate slots run parallel to the arcuate wall of the blank holder. As a result, the arcuate slots lie on a circular path around the center of the milling drum, so that the slots have a circular arc-shaped course with a parallel distance from the cylindrical surface of the milling drum.

In a further development of the road milling machine displaceable bearings or bearings are assigned to the oblong holes. The bearings ensure that in the slots an almost backlash-free and tilt-free, slidable storage of the hold-down against the side walls of the Fräswalzenkastens arises. As a result, during milling, in particular forces exerted by the milled material on the blank holder, but also frictional forces between the free transverse edge of the blank holder resting on the road surface to be milled and the road surface can not lead to jamming of the blank holder between the side walls, which causes the automatic up and down movement of the blank holder would prevent. Rather, the bearings lead to a smooth in all operating conditions of the road milling machine mobility of the hold-down between the side walls by the bearings can slide smoothly along the long holes along.

According to a preferred embodiment of the invention, each bearing has at least one rolling element. The rolling elements can be formed by bushes that run smoothly with the least possible play in the arcuate slots, in particular roll in the slots. By this type of rolling bearing a particularly smooth and tilt-free floating support of the blank holder between the side walls of the Fräswalzenkastens is created. The hold-down can steadily move up and down without the risk of jamming during operation of the road milling machine to adapt to the height and course of the road surface to be scoured and different cutting depths. Such a smooth bearing is particularly advantageous in the bow-shaped hold-down, because it is particularly easy to jam between the side walls by the inventive radial guiding around the milling drum. This danger is effectively and reliably avoided by the special design of the bearings of the arcuate hold-down between the side walls, in particular caused by the bushings rolling bearings.

Particularly preferably, the road milling machine has at least one tracking element. The Nachführorgan serves to adjust the height of the hold-down. This ensures that tilting of the hold-down is reliably prevented, since the raising or lowering of the hold-down is made by the Nachführorgan. The tracking element is preferably hingedly connected to the hold-down. A smooth-running articulated connection, in particular by a rod, between the Nachführorgan and the hold-down ensures a low-friction and safe operation of the road milling machine. The fact that the hold-down is raised by the Nachführorgan from above instead of being directly pushed upwards by the abraded road surface from below, canting be effectively avoided.

In particular, the tracking element is guided on the milling frame and / or on the Fräswalzenkasten in a vertical plane pivoted. To guide the Nachführorgans a guide, for example, such as a bolt on the cutter frame or on the Fräswalzenkasten arranged so that the guide can be brought into engagement with the Nachführorgan, for example by engaging in a slot of Nachführorgans. Such a guide then allows pivoting of the Nachführorgans exclusively in a vertical plane about an axis of rotation, which is aligned perpendicular to the vertical plane. However, the guidance of the Nachführorgans in a vertical plane can also be designed differently, for example in the form of at least one guide rail. The advantage of the guided pivoting of Nachführorgans exists The fact that the Nachführorgan can move vertically in a well-defined angular range while maintaining its orientation and position in the horizontal direction, so that a precise height adjustment of the hold-down is ensured by a vertical movement of at least a portion of the Nachführorgans.

The tracking member is preferably brought into contact with the road surface to be scoured. In particular, the tracking element rests at least partially on the road surface to be scoured. By a direct mechanical system of Nachführorgans on the abzufräsenden road surface, the Nachführorgan can ensure an exact tracking of the blank holder in height. In particular, the tracking member slides along with a slider arranged on the road surface to be scoured off. The slider is preferably formed in a circular segment shape with a smooth surface down and aligned curved upward, so that the upwardly bent ends of abzufräsendem pavement point away. As a result, unevenness in the road surface does not lead to a jamming or catching of the slider on these irregularities, but the slider can slide over these irregularities.

Preferably, the tracking member is formed substantially triangular and in particular rotatably mounted about a rotation axis. The axis of rotation is formed in particular by a bearing on the milling frame of the road milling machine and is preferably arranged at one end or a corner of the Nachführorgans. Thus, the axis of rotation opposite end of the Nachführorgans perform a partially substantially vertically aligned movement. This axis of rotation opposite the end of the Nachführorgans is particularly preferably non-positively connected to the hold-down. Thus, a vertical movement of this end of the Nachführorgans also leads to a vertical movement of the blank holder.

The tracking member is preferably arranged in the milling direction in the area in front of the hold-down. This ensures that the follower organ scans the not yet milled road surface and the height of the holddown can adjust the pavement following.

Fig. 1

eine schematische Seitenansicht einer Straßenfräse,

Fig. 2

eine perspektivische Ansicht von schräg oben auf einen Fräswalzenkasten mit einer Fräswalze,

Fig. 3

eine perspektivische Ansicht des Fräswalzenkastens mit der Fräswalze von schräg unten,

Fig. 4

eine Seitenansicht des Fräswalzenkastens mit der Fräswalze bei montierter Seitenwand und Seitenschild,

Fig. 5

eine Ansicht analog zur Fig. 4 ohne die Seitenwand und das Seitenschild,

Fig. 6

einen Längsschnitt durch eine Lagerung eines Niederhalters an einer Seiten- wand,

Fig. 7

eine Seitenansicht des Fräswalzenkastens analog zu Fig. 5 gemäß des zweiten Ausführungsbeispiels der Erfindung,

Fig. 8

eine Seitenansicht eines an dem Niederhalter gemäß Fig. 7 installierten Nachführorgans, und

Fig. 9

eine Ansicht des am Niederhalter installierten Nachführorgans aus einer Ansicht entgegen der Fräsrichtung.

Two preferred embodiments of the invention are explained below with reference to the drawing. In this show:

Fig. 1

a schematic side view of a road milling machine,

Fig. 2

a perspective view obliquely from above on a Fräswalzenkasten with a milling drum,

Fig. 3

a perspective view of the Fräswalzenkastens with the milling drum obliquely from below,

Fig. 4

a side view of the Fräswalzenkastens with the milling drum with mounted side wall and side plate,

Fig. 5

a view analogous to Fig. 4 without the side wall and side shield,

Fig. 6

a longitudinal section through a bearing of a hold-down on a side wall,

Fig. 7

a side view of the Fräswalzenkastens analogous to Fig. 5 according to the second embodiment of the invention,

Fig. 8

a side view of one of the holddown according to Fig. 7 installed tracker, and

Fig. 9

a view of the follower installed on the hold-down member from a view opposite to the milling direction.

The Fig. 1 shows a road milling machine with a cylindrical milling drum 11 for milling defective and / or worn pavements. The road milling machine 10 is self-propelled and provided with a corresponding chassis. The road milling machine 10 shown has a wheel chassis 12. The road milling machine 10 may also have one or more caterpillar drives. The road milling machine 10 has a drive for the wheel drive 12 and the milling drum 11. The drive drives the milling drum 11 about a horizontal axis of rotation 13. The drive may be an internal combustion engine which drives hydraulic pumps, which in turn serve to drive hydraulic motors for the wheeled chassis 12 and the milling drum 11. It is also conceivable that the internal combustion engine drives a generator which generates power for driving electric motors for the wheeled chassis 12 and the milling drum 13.

The road milling machine 10 has a milling frame 14 to which a milling drum box 15 is coupled. The Fräswalzenkasten 15 extends as the axis of rotation 13 of the milling drum 11 transversely to the direction indicated by an arrow milling direction 16 of the road milling machine 10, preferably over the entire or nearly entire width of the road milling machine 10, in particular the Fräsrahmens 14th

The Fräswalzenkasten 15 is down to its bottom, whereby the distributed distributed on a cylindrical surface 17 of the milling drum 11 arranged chisel 18 can reach the abzufräsenden defective road surface, closed. At least one side wall 20 serves for the rotatable mounting of the milling drum 11 in the milling drum box 15. A rear lower part of the box casing 19 is not curved, but straight. A lower rear edge of the straight portion of the box shell 19 is associated with a height-adjustable wall element 22. This serves to retain the back of the milling drum 11 by a only partially in the Fig. 1 illustrated conveyor 23 abzutransportierenden milled road surface, namely the Milling material. Outside next to the side walls 20 and 21 side plates 24 are still provided, which extend only over a lower half of the milling drum 11 and serve to prevent the lateral exit of milled material from the Fräswalzenkasten 15.

In accordance with the invention, a hold-down 25 forming a front lower part of the milling drum box 15 is designed. This hold-down 25 is formed in the longitudinal direction of the axis of rotation 13 of the milling drum 11 is arcuate. As a result, the hold-down device 25 extends radially around the milling drum 11, and at a distance from the lateral surface 17 and the tips of the cutting tool 18 of the milling drum 11. The hold-down 25 thereby continues the part-circular course of the box shell 19 at the front of the Fräswalzenkastens 15. The arcuate hold-down 25 is located on a partial circular path which is concentric with the cylindrical surface 17 of the milling drum 11. The center of the arcuate hold-down 25 is thereby on the axis of rotation 13 of the milling drum 11. In this way arises between the cylindrical surface 17 of the milling drum 11 and the arcuate inside of the blank holder 25 in the direction of rotation 26 of the milling drum 11 the same gap space 27. The gap 27th is so large that the tips of the cutting tools 18 are all approximately equidistant from the partial arc-shaped curved inside of the blank holder 25, in each rotational position of the milling drum 11 (FIG. Fig. 5 ).

Due to the approximately semi-cylindrical design of the box shell 19 of the same width gap 27 between the hold-down 25 and the cylindrical surface 17 of the milling drum 11 is continued in the area of the box shell 19. In this way, the milling drum 11 is surrounded in the region of the Fräswalzenkastens 15 to the straight wall element 22 in the rear lower portion of the Fräswalzenkastens 15 of a cylinder chamber whose center is located on the axis of rotation 13 of the milling drum 11. The box shell 19 and the hold-down 25 are provided with respect to the circumferential direction of the milling drum 11 with such a length that they partially overlap, with an upper part of the blank holder 25 rests on the outside of the box shell 19 or is optionally slightly spaced therefrom. As a result, an upper transverse edge 28 of the hold-down 25 is above a lower (front) transverse edge 29 of the arcuate or semi-circular box shell 19th

The hold-down 25 is between the side walls 20 and 21 easily freely up and stored movable. This up and down movement of the blank holder 25 takes place on a part-circular path outside the arcuate, in particular partially cylindrical box shell 19. When moving up and down the hold-down 25 follows the arcuate course of the outside of the box shell 19. The area with which the hold 25th overlaps the box shell 19, 25 is increased or decreased accordingly when moving up and down of the hold-down. However, a narrow overlap between the hold-down 25 and the box shell 19 is maintained even when completely downwardly moved or heruntergeschwenktem hold-25. When moving up and down the hold-down 25 this moves quasi about an axis of rotation which is located on the axis of rotation 13 of the milling drum 11, whereby the hold-down 25 moves up and down on a concentric circular path to the box shell 19.

The arcuate hold-down 25 is guided during automatic up and down by arcuate slots 30, 31. The arcuate course of the slots 30 and 31 is such that their longitudinal center axes lie on a circular path, the center of which is also on the axis of rotation 13 of the milling drum 11. Thus, the elongated holes 30, 31 as the cylindrical part of the box shell 19 and the hold-down 25 extend on an imaginary concentric circular path to the axis of rotation 13 and the cylindrical surface 17 of the milling drum eleventh

In the road milling machine 10 shown here, the slots 30, 31 associated with opposite edges of the blank holder 25. The elongated holes 30, 31 are housed in edge strips 32 at opposite arcuate longitudinal edges of the blank holder 25. The edge strips 32 project in the manner of collars on the outside of the curved hold-25 outward, so that the pitch circle on which the slots 30, 31 lie, has a slightly larger radius than In the illustrated road milling machine 10, the edge strips 32 are longer, approximately twice as long as the hold-down 25 is formed. As a result, the edge strips 32 overlap the arcuate box jacket 19 over a much greater length than the hold-down 25. In the embodiment shown, each edge strip 32 is provided with two successive oblong holes 30 and 31 whose longitudinal center axes lie on a common imaginary concentric circular path about the axis of rotation 13. The slots 30 extend approximately over such a peripheral region of the Fräswalzenkastens 15, over which also the hold-down 25 extends. The elongated holes 31 located in front of the oblong holes 30 are in the region of the edge strips 32 projecting in the manner of a tongue in relation to the upper transverse edge 28 of the hold-down device.

The hold-down 25 is mounted visually displaceable by means of the edge strips 32 between opposite side walls 20, 21 of the Fräswalzenkastens 15. For storage of the blank holder 25 between the side walls 20 and 21 serve in the illustrated road milling 10 four identically formed bearings 33. In each of the two slots 30, 31 in the edge strip 32 on the left side of the blank holder 25 and the edge strip 32 on the right side of the Hold-down 25 thus two bearings 33 are provided. The bearings 33 are inventively designed so that they hold the hold-down 25 substantially free of play, but easily automatically displaced between the side walls 20, 21. In particular, the bearings 33 are formed so smoothly that the hold-down 25 can automatically lower due to its own weight on the top of abzufräsenden road surface, during operation of the road milling machine 10 when pressure against the milling direction 16 on the free lower edge 34 of the blank holder 25th is exercised. In order to ensure such a play-free, smooth and tilt-free mounting of the hold-down 25 between the side walls 20, 21, the bearings 33 are formed as rolling bearings ( Fig. 6 ). Accordingly, each bearing 33 has a bolt 35 fastened to the respective side wall 20, 21, which protrudes inwards relative to the respective side wall 20, 21 and extends through a respective oblong hole 30, 31 in the edge strip 32 lying on the inside adjacent to the side wall 20, 21 extends. On the bolt 35, a freely rotatable sleeve 36 is arranged, whose diameter corresponds approximately to the width of the elongated hole 30 and 31, preferably is slightly thinner, so that the freely rotatable on the bolt 35 mounted sleeve 36 can roll almost free of play in the respective slot 30, 31. On both sides of the sleeve 36 is a thrust washer 37, 38 on the bolt 35, which hold the sleeve 36 in the slot 30, 31 and ensure a guide of the bearing 33 on opposite sides of the respective edge strip 32. There is some play between the thrust washers 37, 38 and the side surfaces of the edge strips 32, so that the thrust washers 37, 38 not hinder the smooth rolling of the sleeve 36 of the bearing 33 in the respective slot 30 and 31 respectively.

The free lower edge 34 of the blank holder 25 is associated with a solid rod 39. With the rod 39 which are pointing to her ends of the edge strips 32 are connected. As a result, the rod 39 and the edge strips 32 form a stable subframe for the guided, frictionless sliding along the edge strips 32 with the hold-down 25 on the inner sides of the side walls 20 and 21. In addition, the rod 39 serves as abutment of the lower edge 34 of the blank holder 25 on the scoured road surface whereby the hold-down 25 slides along with the rod 39 on the pavement and the course of the same following the hold-down 25 guided by the bearings 33 in the slots 30, 31 moves up and down.

Center of the rod 39 is still a fork 40 is fixed to the free end of a piston rod in the Fig. 1 shown hydraulic cylinder 41 is articulated. From the hydraulic cylinder 41, the entire hold-down 25 can be raised when the road tiller 10 is to be moved in interrupted milling operation.

The second embodiment of the invention is an extension of the first embodiment already described above. Thus, the road milling machine 10 is formed in principle as described above. In the Fig. 7 to 9 Therefore, only the changes compared to the road milling machine 10 are shown according to the first embodiment. The same reference numbers are used for the same parts.

At the Fräswalzenkasten 15 with the milling drum 11 of the road milling machine 10, the hold-down 25 is arranged. In this embodiment, an additional tracking member 42 is arranged in the milling direction 16 in front of the hold-down 25. The tracking member 42 is connected via a control lever 43 to the hold-25. The tracking member 42 has a substantially triangular, flat shape, and is rotatably mounted with a pointing away from the hold-down 25 corner on a bearing pin 44 on the milling frame 14 of the road tiller 10 in a vertical plane. Another bearing bolt 45 arranged on the milling frame 14 extends through a substantially arcuate one Slot 46 of Nachführorgans 42. A rotation of Nachführorgans 42 to the bearing pin 44 is thus possible to the extent that a movement of the bearing pin 45 in the slot 46 is possible. The corresponding with the bearing pin 45 slot is used for tilt-free guidance of Nachführorgans 42, which is characterized substantially free of play in the vertical plane pivotable. In the embodiment shown, the tracking member 42 can be pivoted by an angle of about 30 °. The control lever 43 is rotatably mounted on the tracking member 42 in the region of the upper tip parallel to the plane of the Nachführorgans 42. A bolt 47 is used for this purpose. The other end of the control lever 43 is rotatably mounted by means of a bolt 48 in addition to the fork 40 arranged on the hold-down 25 for fastening one end of the hydraulic cylinder 41. As a result of the approximately central arrangement of the fork 40 on the hold-down 25, both the hydraulic cylinder 41 and the tracking element 42 act essentially centrally on the hold-down 25 via the control lever 43.

The tracking member 42 has a slightly upwardly curved slider 49 in the region of its lower corner. By this slider 49, the tracking member 42 is in contact with the abraded road surface by the slider 49 rests on this. If an increase in the road surface for an upward movement of the slider 49 and thus pivoting the Nachführorgans 42 provides about the bearing pin 44, the control lever 43 conveys this upward movement of the hold-down 25 so that it moves substantially upwards. With a lowering of the abraded road surface of the slider 49 follows due to the applied gravity of this movement accordingly and the tracking member 42 pivots about the bearing pin 44 down. This movement is also passed from the control lever 43 to the hold-down 25 so that it also moves by gravity down. Due to the articulated connection of the Nachführorgans 42 with the control lever 43 and the hold-25, the hold-down 25 moves in the same vertical direction and the same distance as the slider 49, so that the rod 39 of the hold-down 25 during operation of the road tiller 10 at any time rests on the surface of the abzufräsenden road surface. Tilting is reliably prevented by the Nachführorgan 42.

Alternatively or additionally, the hydraulic cylinder 41 can adjust the hold-down 25 and at the same time the tracking member 42 in height. In addition, a pulling up of the blank holder 25 and the Nachführorgans 42, for example, for transport purposes possible.

LIST OF REFERENCE NUMBERS

10

road milling machine

11

milling drum

12

wheel chassis

13

axis of rotation

14

cutting frame

15

cutter housing

16

Milling direction

17

cylindrical surface

18

Tooth

19

box coat

20

Side wall

21

Side wall

22

wall element

23

Conveyor

24

side shield

25

Stripper plate

26

direction of rotation

27

gap

28

upper transverse edge

29

lower transverse edge

30

Long hole

31

Long hole

32

edge strips

33

storage

34

lower edge

35

bolt

36

shell

37

thrust washer

38

thrust washer

39

pole

40

fork

41

hydraulic cylinders

42

Nachführorgan

43

control lever

44

bearing bolt

45

bearing bolt

46

Long hole

47

bolt

48

bolt

49

skid

Claims (14)

1. Road milling machine having a chassis and a rotatably drivable milling roller (11) which is partially surrounded by a milling roller housing (15), wherein the milling roller housing (15) has, on its transverse edge (29) that is located at the front in the milling direction, a movable holding-down means (25) that is configured in an arcuate manner, wherein an arc midpoint of the arcuate holding-down means (25) is located on a central rotation axis (13) of the milling roller (11), characterized in that the arcuate holding-down means (25) is movable about the rotation axis (13) on an arcuate path such that it is pivotable or movable in the geometrical sense about the rotation axis (13).
2. Road milling machine according to Claim 1, characterized in that the arcuate holding-down means (25) extends about the milling roller (11) on a concentric circular path.
3. Road milling machine according to Claim 1 or 2, characterized in that the radius of the arcuate holding-down means (25) is larger by a milling gap than the maximum radius of the milling roller (11) at the tips of the milling cutters (18) arranged on the outer circumference of a cylindrical lateral surface (17) of the milling roller (11).
4. Road milling machine according to one of the preceding claims, characterized in that the arcuate holding-down means (25) is height-adjustable on an arcuate path, wherein the midpoint of the arcuate path is located on the rotation axis (13) of the milling roller (11).
5. Road milling machine according to one of the preceding claims, characterized in that the arcuate holding-down means (25) is mounted so as to be height-adjustable between opposite side walls (20, 21) of the milling roller (11).
6. Road milling machine according to Claim 5, characterized in that the side walls (20, 21) and/or rims of the holding-down means (25), in particular peripheral strips (32) at the arcuate rims of the holding-down means (25), have arcuate slots (30, 31) about a midpoint located on the rotation axis (13) of the milling roller (11), wherein, by means of mountings (33) that extend through the slots (30, 31), the holding-down means (25) is movable freely up and down in a guided manner.
7. Road milling machine according to Claim 5 or 6, characterized in that a rim of the holding-down means (25) or a peripheral strip (32) secured to the holding-down means (25) is guided on each side wall (20, 21) by way of a plurality of mountings (33) located one behind another.
8. Road milling machine according to Claim 6 or 7, characterized in that each mounting (33) has at least one roller body, wherein preferably each roller body is formed by a sleeve (36) or bushing.
9. Road milling machine according to Claim 8, characterized in that each bushing or sleeve (36) runs in an arcuate slot (30, 31), and in particular each bushing or sleeve (36) rolls in an arcuate slot (30, 31).
10. Road milling machine according to one of the preceding claims, characterized by at least one follower member (42) for the height adjustment of the holding-down means (25), wherein preferably the follower member (42) is pivotable in a manner guided in a vertical plane on the milling frame (14) and/or on the milling roller housing (15).
11. Road milling machine according to Claim 10, characterized in that the follower member (42) is connected in an articulated manner to the holding-down means (25), preferably via a control lever (43).
12. Road milling machine according to either of Claims 10 and 11, characterized in that the follower member (42) is in contact with the road surface to be milled off, and in particular rests thereon.
13. Road milling machine according to one of Claims 10 to 12, characterized in that the follower member (42), which is preferably formed in a substantially triangular manner, is mounted on the road milling machine (10) so as to be rotatable about a rotation axis, and preferably the follower member (42) is connected in a force-fitting manner to the holding-down means (25) at an end opposite the rotation axis.
14. Road milling machine according to one of Claims 10 to 13, characterized in that the follower member (42) is arranged in the region in front of the holding-down means (25) in the milling direction (16).

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