EP1194651B1 - Construction machine and milling roller - Google Patents

Abstract

In a construction machine comprising a machine frame (2) having a milling roller (18) arranged for rotation therein, the milling roller (18) comprising a roller base body (19) driven by a milling roller drive device (11 to 15) via a transmission unit (32), and a milling tube (25) to be coaxially mounted on the roller base body (19) and to be attached in a manner allowing exchange thereof, with the milling tube (25) carrying cutting tools on its outer surface (46), it is provided that the milling tube (25) comprises fastening elements (28), radially projecting from the inner surface (44), by which the milling tube (25) can be mounted in a rotationally fixed manner to the roller base body (19) or to a member connected to the roller base body (19).

Description

The invention relates to a milling drum according to the preamble of A construction machine according to claim 28.

It is often necessary due to different construction site situations and milling work the milling tool the specific tasks adapt. For example, if a certain surface roughness is to be achieved is a milling drum with a certain line spacing of the milling tools or another Tooling equipment required. In another use case only certain lane widths should be expanded, so that a milling drum with a certain working width is required becomes.

As a rule, a special milling machine is required in such situations be used, or the machine must be equipped with one of the Task adapted milling drum to be equipped. Currently the replacement of the rollers is very complex and requires special aids for assembling or disassembling the milling drum.

The adaptation of the milling tool to different requirements is known in the art.

DE 40 37 448 A describes a road milling machine in which the roller body between a supporting the drive housing Fixed bearing and an opposite floating bearing is clamped. The floating bearing is provided with a centering taper and the bracket of the floating bearing can be moved hydraulically become. Furthermore, the floating bearing is connected to the tie rod Fixed storage braced.

In the solution known from DE 40 37 448 A is a complex Clamping mechanism with a tie rod and an adjusting cylinder needed above the milling drum.

In US 4704045 a milling unit is described, the Width through the use of different roller segments can be varied. The roller segments are in this solution connected to each other via a plug connection. This kind in a way provides a milling drum quick-change system which has the following disadvantages:

A disadvantage of this solution is that the milling drum drive is done hydrostatically on both sides of the milling drum Hydraulic motors are attached. In addition, the connection a simple plug connection between the segments, which only allows inadequate centering of the milling rotor.

DE 31 45 713 A describes a milling drum for a road milling machine, by means of a roller bearing supported by a support frame and drive device supported and driven is, the milling drum from a cylindrical base body consists. Located on one end of the milling drum on one side the drive of the roller bearing and drive device as well a ring shoulder against which the one pushed from the other end Milling tube supports. On the opposite of the drive A holding flange is attached to the side of the milling tube fixed. This concept sees a hydrostatic drive the milling drum, which due to its systemic disadvantages, e.g. low efficiency, today hardly with road milling machines is still used. There is also a disadvantage of this solution in that the milling tubes are axially fixed via ring shoulders must be so that the fasteners in the area of heaviest pollution.

The US 4,720,207 describes mounted on a roll base Fräsrohrsegmente. With this conception, first of all a corner ring segment attached to one side. Then they will Milling tube segments screwed to this, the screw connections are within the segments. The enormous screwing effort is disadvantageous and that the milling depth due to the constant Diameter of the base body, is restricted if a Planetary gear is integrated in the base body.

Another solution, in which above all the milling depth is not restricted is described in US 5,505,598. At this is the milling drum tube on which the segments with the milling tools be assembled, paragraph. The reason for this is that is required for a mechanical milling drum drive Gear is integrated in the rotor. The planetary gear is located on the opposite side of the belt driven pulley Side and is driven by a drive shaft through the milling shaft driven.

This gear arrangement is required to achieve a flush milling to enable. In the area of the roller gear is Diameter of the milling shaft according to the volume of the gear unit customized. Then segments can be in the remaining area be attached with the milling tools.

A disadvantage of this invention is that for carrying out various Milling work, such as normal or fine milling, on one Exchange of the milling rotor can not be dispensed with.

The current milling drums and inventions to customize the Focus milling tools on different applications only the adaptation of the milling rotor to the respective Site situation.

The problem with the prior art mentioned is in Rule that the fasteners to fix the milling element on the base body, in the jacket area of the cylindrical Milling tool. But this area is particularly special exposed to heavy soiling, thereby changing of the milling tube is made considerably more difficult.

The invention has for its object a milling drum and to create a construction machine that can quickly change from Milling drums, the simplified handling of the removed milling drums enable and the required for changing a milling drum Minimize time and effort.

To solve this problem, a milling drum or Construction machine with the features of claims 1 and 28, respectively.

• Zum Austausch des Fräswerkzeuges braucht nur das Fräsrohr ausgetauscht werden.
• Die Befestigungselemente befinden sich im Bereich der geringsten Verschmutzung.
• Der Walzenantrieb mit den mechanischen Fräswalzenantriebselementen verbleibt ausgerichtet gegenüber dem gesamten Antriebsstrang an der Maschine.
• Eignung der Fräswalze für verschiedene Fräswalzenkonzeptionen.
• Keine Justierung des Antriebsstranges erforderlich.
• Zentrierung des Fräsrohres auf den Fräswalzenantriebselementen.
• Leicht lösbare Verbindung Fräsrohr-Fräswalzenantriebselement
• Reduzierung des Hebezeugaufwandes.
• Vermeidung von Unwuchten infolge von Achsverschiebungen oder Winkelversätzen.

The solution according to the invention advantageously provides that the one-piece milling tube has fastening elements projecting radially from the inner lateral surface, with which the milling tube can be fastened in a rotationally fixed manner to the roller base body or to a part connected to the roller base body. This solution has the following advantages:

• To replace the milling tool, only the milling tube needs to be replaced.
• The fasteners are located in the area of minimal contamination.
• The roller drive with the mechanical milling drum drive elements remains aligned with the entire drive train on the machine.
• Suitability of the milling drum for different milling drum designs.
• No adjustment of the drive train required.
• Centering of the milling tube on the milling drum drive elements.
• Easily detachable connection between milling tube and milling drum drive element
• Reduction in hoisting effort.
• Avoiding imbalances due to axis displacements or angular misalignments.

The fastening elements are preferably on at least one arranged front end of the milling tube. In this way can, for example, the milling tube on the roller body be postponed and by guide elements on the Fasteners opposite the axial end of the Roller body are guided and centered.

Preferably, the milling tube on one end of the Fixed roller body. The fasteners are there protected from pollution.

In a preferred embodiment, the Fastening elements radially inward from the milling tube protruding flange parts. Mounting screws are through this Flange parts passed axially and in the front of the Screwed roller body into it.

The milling tube can be a radial distance from that Comply with the roller body. In the thereby subject to change cylindrical cavity can be used, for example, to cool the Milling drum water can be filled.

The milling tube is preferably at two axially spaced locations supported radially on the roller body. The support can thereby consist of radial guide elements, either radially outside on the roller base body or radially inside on the Milling tube are attached. The guide elements consist of Support rings or segmented in the circumferential direction Guide elements, for example, under a mutual Angular distance of 120 ° can be arranged. The Guide elements can have an axial cross section conical (i.e. trapezoidal), spherical or cylindrical shape exhibit.

The support can also consist of radial guide elements, the one piece with the at least one fastener are, so that the fastener is the axial non-rotatable connection between the milling tube and the roller body and the guidance and centering of the milling tube on the Roller base body at an axial.

The radial guide elements can have radially acting clamping elements exhibit.

The milling tube is preferably in one piece.

At least between the milling tube and the roller body a support ring can be arranged, for example from at least consists of two radially bracing segment rings.

This support ring can be relative to the roller body and the Milling tube to be axially displaceable.

The segment rings of the support ring can be wedge-shaped in cross section his.

The at least one support ring can have a conical cross section middle ring consist of a radially outer as well as against a radially inner ring, the one in cross section have opposite conical shape, be axially clamped and the outer ring against the milling tube and the inner ring press against the roller body.

The at least one support ring can be circumferentially divided into two or more parts. This simplifies assembly a support ring; for example, the support ring can consist of two Half rings or consist of 120 ° segments.

In one embodiment it is provided that the gear unit on the milling drum drive device facing End of the roller body is arranged. Here is the gear unit preferably integrated into the roller body.

In another embodiment it is provided that the Gear unit on that facing away from the milling drum drive device End of the roller body is arranged, the Gear unit via a lead through the roller body Shaft connected to the milling drum drive device is. In this case too, the gear unit is in the roller base integrated. Such a construction allows Use of milling tubes with a small milling width.

The roller body is in two side walls of a roller box stored, the side wall facing away from the roller drive is pivotable or axially parallel. The pivotable or axially displaceable side wall takes in Closing state of the floating bearing of the roller base body.

For this purpose, the floating bearing can be a guide part that tapers outwards have, which in a correspondingly tapered Side wall recess recessed and centered becomes.

Further advantageous developments of the invention are the others Claims.

The following are exemplary embodiments with reference to the drawings of the invention:

Fig. 1

eine Straßenfräsmaschine,

Fig. 2

eine schematische Darstellung des Fräswalzenantriebs,

Fig. 3

ein erstes Ausführungsbeispiel einer in einem Walzenkasteri gelagerten Fräswalze mit auswechselbarem Fräsrohr,

Fig. 4

ein zweites Ausführungsbeispiel einer in einem Walzenkasten gelagerten Fräswalze,

Fig. 5

eine schwenkbare Seitenwand des Walzenkastens,

Fig. 6 und 7

ein alternatives Ausführungsbeispiel für die radiale Abstützung des Fräsrohrs,

Fig. 8

ein drittes Ausführungsbeispiel einer Fräswalze, und

Fig. 9

einen Schnitt entlang der Linie IX-IX in Fig. 8.

Show it:

Fig. 1

a road milling machine,

Fig. 2

a schematic representation of the milling drum drive,

Fig. 3

1 shows a first exemplary embodiment of a milling drum mounted in a roller box with an exchangeable milling tube,

Fig. 4

a second embodiment of a milling drum mounted in a roller box,

Fig. 5

a swiveling side wall of the roller box,

6 and 7

an alternative embodiment for the radial support of the milling tube,

Fig. 8

a third embodiment of a milling drum, and

Fig. 9

a section along the line IX-IX in Fig. 8.

In Fig. 1, a road milling machine 1 is shown in the the invention described below mainly used becomes. Road milling machines generally consist of a chassis 2 in which an internal combustion engine 11 is mounted. The chassis the machine usually consists of height-adjustable lifting columns 3.4, on which support wheels or chain drives 5.6 are mounted are.

The milling unit 7 with the milling drum 18 is located under the Chassis 2 and is rigidly connected to this. That from the Milling drum loosened material is conveyed to a first conveyor belt 9, the material to a second, height adjustable and forwardable pivoting conveyor belt 10.

Fig. 2 shows the milling drum drive concept. An internal combustion engine 11 drives a pulley 13 directly. In this The drive train is usually still a pump distributor gear 12, on which the hydraulic pumps for the various hydrostatic drives are mounted. About one Composite V-belt 14, the engine power to a second Transfer pulley 15. This pulley is with one Shaft connected to the power to a planetary gear inside of the milling drum 18, which transmits the engine speed the necessary roller speed is reduced. The milling drum is stored in the side walls 16 and 17.

Fig. 3 shows a first embodiment of a in a roller box 31 stored milling drum 18. The milling drum 18 exists from a roller base body 19, the two axial Ends in the side walls 16, 17 of the roller box 31 are rotatable is stored, and a milling tube 25 takes this from one planetary gear at one axial end existing gear unit 32 and is with this non-rotatably connected. The fixed gear part 22 of the planetary gear 32 is by means of a screw 20 on the Side wall 16 attached. An outer panel 21 can have 20 openings 23 at the level of the screw connections, so the screw connections 20 are accessible from the outside. On the axial end of the roller base body opposite the drive side 19, a floating bearing 24 is provided, which with the help a guide part 40 centrally in a recess 41 of the Side wall 17 is mounted. The guide part 40 and the recess 41 can have a conical shape which is matched to one another, so that the roller body 19 with the floating bearing 24 in easier Way is mounted centrally.

For mounting the milling tube 25 on the roller base body 19 the milling tube 25 is pushed over the roller base body 19. On the drive end of the roller body 19 is a radial Guide element 26 provided that on the one hand on the Roller base body 19 is attached and on the other hand as a screw flange serves for the planetary gear 32. The leadership elements 26 can consist of an annular flange or Ring segments that only fill part of the circumferential area. The guide elements 26 are slightly conical in cross section, spherical or cylindrical and can on the roller body 19 be welded. The radial support of the milling tube on the roller base body 19 can in principle both positively and frictionally. For example the guide elements 26 can also be made from a spline profile consist.

The guide elements 26 center the exchangeable milling tube 25. A conical or spherical shape in cross section is preferred in order to tilt during the assembly of the milling tube 25 avoid.

At the end of the roller base body facing the floating bearing 24 19 is a radial support of the milling tube 25 with the help of a Fastening element 28 of the milling tube 25 is provided. This Fastening element 28 consists, for example, of a radial one ring flange projecting inwardly from the milling tube 25, attached to the inner lateral surface 44 of the milling tube 25 is. This ring flange can, as can be seen from FIG. 3, be L-shaped in cross-section, with an axially projecting Ring segment or ring 42, the milling tube 25 with a fit supported radially on the roller base body 19.

The radially inward protruding portion of the fastener 28 with the help of axial fastening screws screwed to the front end 43 of the roller base body 19, so that the milling tube 25 rotatably with the roller base 19 is connected. The roller body 19 can with his the end bearing 43 facing the floating bearing 24 on the from the ring flange existing fastener 28 without Form a gap 27 apply.

On the outer circumferential surface 46 of the milling tube 25 are not shown milling tools mounted.

To the road milling machine to meet different requirements To be able to adapt to a construction site, only the milling tube 25 can be exchanged. In this way, milling tubes 25 can be different Working width or with a different Line spacing of the milling tools to a different surface roughness of the road surface to be used and can be quickly replaced with other milling tubes 25.

To mount the milling tube 25, the one located on the floating bearing 24 Side wall 17 disassembled or via a hinge or a gear 30, as shown in Fig. 5, pivoted. The hinge 30 or the transmission is attached to the roller box 31. After pivoting the side wall 17, the fastening screws of the fastener 28 are solved and the milling tube 25 can be replaced with simple tools.

Fig. 4 shows a further embodiment for narrow working widths of the milling tube 25, in which in particular the planetary gear 32 on the side of the roller base body facing away from the drive 19 is arranged. The planetary gear 32 is over a shaft 56 which passes through the roller base body 19 is connected to the milling drum drive 11 to 15. The Arrangement of the planetary gear 32 on the drive remote Side allows the milling tube 25 to be almost flush with the Machine outer edge (zero side) closes. When changing the milling tube 25 can after removing the side wall 17 Milling tube 25 are pushed over the planetary gear 32 until the fastener 28 abuts the planetary gear 32.

At the end of the milling tube facing away from the planetary gear 32 25 is a radial support for the milling tube between the Milling tube and the roller base body 19 arranged support ring 33 arranged, which consists of several segment rings 60,62,64. The support ring 33 is axially both relative to the milling tube 25 as well as displaceable relative to the roller base body 19. The outer segment rings 62,64 are on the radial the middle one Segment ring 60 tapered side and in the Inclination of the conical surfaces to the middle one, which is wedge-shaped in cross section Adjusted segment ring 60. The middle segment ring 60 has fastening screws 35 which are ring-shaped or ring segment-shaped pressure plate 34 cooperate to the outer segment rings 60,64 against the middle segment ring 60 to brace. Due to the expansion of the outer segment rings 62, 64, the milling tube 25 is fixed on the roller base body 19 tense and centered at the same time.

The maximum cutting circle diameter is by dashed lines indicated, as well as the minimum milling width.

The figures 6 and 7 show an alternative radial support of the milling tube 25 on the roller base body 19. As from FIG. 6 can be seen, the fastener is in this embodiment 28 axially flush at the front end 43 of the Roller base body 19 without a gap.

At the free end of the roller base body 19 is a cylindrical Guide element 26 welded to the tight fit the inner lateral surface 44 of the milling tube 25 abuts. Furthermore is the inner lateral surface 44 of the milling tube 25 on his free end protected with a protective sleeve 39, so that of the milling drum 25 loosened material not the inner surface 44 of the milling tube 25 can damage. Preferably, the Protective sleeve 39 on the planetary gear 32 via a flange attached.

FIG. 8 shows an alternative exemplary embodiment to FIG. 4 shown, the fastener 28 with a close fit rests on a flange part of the planetary gear 32. On Support ring 33 is screwed to the roller body 19 and can the roller base body 19 in different axial positions depending on the length of the milling tube 25. For this the roller base body 19 has a protective tube 38 which can be replaced and mounted non-rotatably on the roller base body 19 is. The protective tube 38 serves to roll the body 19 in front To protect damage from the milled material. In the protective tube 38 are recesses 37 in predetermined axial Spaces evenly spaced around the circumference which the support ring 33 is mounted on the roller base body 19 can be. The axial distances between the recesses 37 are Lengths of different milling tubes 25 adjusted. The cutouts 37 are, if no support ring 33 is mounted, with a cover 36 closed, so that also in the area of the recesses 37 no damage to the roller base body 19 can occur. It is preferably provided that the support ring 33 with a Protective sleeve 39 is combined, which is at the free end of the milling tube 25 protects the inner lateral surface 44.

FIG. 9 shows a section along the line IX-IX in FIG. 8. The support ring 33 consists of two halves, which by means of Screw connections 47 on the roller base body 19 against each other can be screwed tight. Here, projections 35 of the Support ring 33 in the recesses 37 of the protective tube 38. The Support ring halves can on the projections 35 with the roller base 19 screwed. For axial displacement of the Support ring 33, the screw connections 47 after removal of the milling tube 25 released, so that the two halves of the support ring 33 can be pulled apart at least as far, that the support ring 33 are pushed over the protective tube 38 can. For spreading the two halves of the support ring apart 33 serve pressure screws 48, with the help of the support ring 33rd on another axial without much effort and time Place of the roller body 19 can be mounted without the Loosen screw connections 47 completely. The recesses 37 are arranged axially in the protective tube 38 so that the Support ring 33 coupled protective sleeve 39 for the inner lateral surface 44 of the milling tube each flush with the free end of the each used milling tube 25 completes.

Claims (28)

1. A milling roller comprising a roller base body (19) driven by a milling roller drive device (11 to 15) via a transmission unit (32), and a one-pieced milling tube (25) to be coaxially mounted from one side on the roller base body (19) and to be attached in a manner allowing exchange thereof, the milling tube carrying cutting tools on its outer surface (46), characterized in that the milling tube (25) comprises fastening elements (28), radially projecting from the inner surface (44) of the milling tube (25), by which the milling tube (25) can be mounted in a rotationally fixed manner to the roller base body (19) or to a member connected to the roller base body (19).
2. The device according to claim 1, characterized in that the fastening elements (28) are arranged on at least one end side of the milling tube (25).
3. The device according to any one of claims 1 or 2, characterized in that the milling tube (25) is fastened to an end side of the roller base body (19) and is radially supported on the other end side.
4. The device according to any one of claims 1 to 3, characterized in that the fastening elements (28) comprise flange members projecting radially inward from the milling tube (25).
5. The device according to any one of claims 1 to 4, characterized in that the milling tube (25) is arranged at a radial distance from the roller base body.
6. The device according to any one of claims 1 to 5, characterized in that the milling tube (25) axially projects relative to the roller base body (19).
7. The device according to any one of claims 1 to 6, characterized in that the member connected to the roller base body (19) comprises the transmission unit (32) integrated into the roller base body (19).
8. The device according to any one of claims 1 to 7, characterized in that the milling tube (25) is radially supported at two axially spaced positions on the roller base body (19).
9. The device according to claim 8, characterized in that the support comprises radial guide elements (26;33;42) fastened either radially outside on the roller base body (19) or radially inside on the milling tube (25) or are arranged between the roller base body (19) and the milling tube (25).
10. The device according to claim 8, characterized in that the support comprises radial guide elements (42), wherein the guide elements (42) are integrally connected to the at least one fastening element (28).
11. The device according to claim 9, characterized in that the support comprises radial guide elements (26), wherein the guide elements (26) are arranged on the free end side of the roller base body (19).
12. The device according to any one of claims 9 or 11, characterized in that the radial guide elements can comprise radially acting tensioning elements (60,62,64).
13. The device according to any one of claims 1 to 12, characterized in that, between the milling tube (25) and the roller base body (19), at least one support ring (33) is arranged as a radial guiding element.
14. The device according to claim 13, characterized in that the at least one support ring (33) comprises at least two radially tensioned segment rings (60,62,64).
15. The device according to claim 13 or 14, characterized in that the at least one support ring (33) is arranged for axial displacement relative to the roller base body (19) and the milling tube (25).
16. The device according to claim 14 or 15, characterized in that the segment rings (62,62,64) are wedge-shaped in cross section.
17. The device according to any one of claims 13 to 16, characterized in that the at least one support ring (33) comprises a central ring (60) having a conical shape in cross section and arranged to be axially tensioned against a radially outer ring (62) and a radially inner ring (64) which have an opposite conical shape in cross section, and pressing the outer ring (62) against the milling tube (25) and the inner ring (64) against the roller base body (19).
18. The device according to any one of claims 13 to 17, characterized in that the at least one support ring (33) is divided into two or more parts in the circumferential direction.
19. The device according to any one of claims 1 to 18, characterized in that the transmission unit (32) is arranged at the end of the roller base body (19) facing toward the milling roller drive device (11 to 15).
20. The device according to any one of claims 1 to 18, characterized in that the transmission unit (32) is arranged at the end of the roller base body (19) facing away from the milling roller drive device (11 to 15), the transmission unit (32) being connected to the milling roller drive device (11 to 15) by a shaft (56) guided through the roller base body (19).
21. The device according to any one of claims 1 to 20, characterized in that the roller base body (19) is supported in two side walls (16,17) of a roller box (31), that the side wall (17) facing away from the milling roller drive device (11 to 15) can be displaced by a pivoting or axis-parallel movement, and that the pivotable side wall (17) in the closed condition receives the movable bearing (24) of the roller base body (19).
22. The device according to claim 21, characterized in that the movable bearing (24) comprises an outwardly tapering guide member (40) and that the side wall (17) comprises a correspondingly tapering recess (41) receiving the guide member (40).
23. The device according to any one of claims 1 to 22, characterized in that the roller base body (19) is supported in two side walls (16,17) of a roller box (31), that the machine cover (21) arranged on the milling roller drive device (11 to 15) is provided with openings (23) allowing access to fastening elements (20) between the side wall (16) facing toward the milling roller drive device (11 to 15) and the transmission unit (32) without a demounting of machine parts.
24. The device according to any one of claims 1 to 23, characterized in that the free end of the milling tube (25) is provided with a protective sleeve (39) for the inner surface (44).
25. The device according to claims 13 and 24, characterized in that the protective sleeve (39) projects from the support ring (33).
26. The device according to any one of claims 1 to 25, characterized in that the roller base body (19) is surrounded by a protective tube (38).
27. The device according to claims 13 and 26, characterized in that the protective tube (38) comprises recesses (37) arranged in a uniform distribution at predetermined axial distances on the circumference, for receiving the support ring (33).
28. A construction machine, preferably comprising a machine frame (2), having arranged or supported therein a milling roller (18) according to any one of claims 1 to 27.

Images