EP2169117A1 - Road finisher - Google Patents

Abstract

The paver (F) has a paving screed (E) linked to a chassis, and a distributing auger (6) carried at a rear end (3) of the chassis by a distributing auger support (4). Upright scraper blades (20) are provided between the auger and the screed and associated to an extended extension screed part (12). The blades are arranged at paving screed extensions (13), and a scraper blade section (20a) is structurally separated from the screed at a channel sheet steel plate (15). The blade section is adjustable in height direction via a drive (7) i.e. hydraulic cylinder, during a road mat casting process.

Description

The invention relates to a road paver according to the preamble of patent claim 1.

From practice, it is known in road pavers caused by the auger, complete Mischgutverteilung the respective, varied over the screed installation thickness according to the first roughly in height and properly adjusted only by the fact that the auger with the screw suspension during installation on the chassis Rear of the tractor is adjusted in height. For large working widths, the augers are widened with auger extensions and the screed extendible parts with flare members. The auger extensions are mounted in the direction of installation in front of the screed with channel plates and supports. The Ausziehbohlenteile are arranged on guide systems at the rear of a base screed. The mix material template must be spread out before the screed. During installation, the mix material template is moved through the screed in the installation direction. Due to the arrangement of the Ausziehbohlenteile at the rear of the base pile results in different sized Mischgutvorlagen. Due to the high dislocation resistance of the bonded mix very high forces are introduced into the guide systems of the Ausziehbohlenteile, which twist the screed, can affect the flatness of the road surface to be manufactured, and ultimately have an influence on the maximum working width of the screed. To reduce the Mischgutvorlage before the Ausziehbohlenteilen and the screed widening parts and to reduce the displacement resistance occurring there are mounted on the screed widening parts pre-scrapers. The Vorabstreifer can be adjusted in height relative to the screed widening part to minimize the Mischgutvorlage before the Ausziehbohlenteil and the screed widening part or adjust correctly.

Furthermore, it is known from practice to mount pre-wiper sections on auger extensions of the auger. The auger is fixed to the chassis at a height that can not be changed during installation in the auger. The pre-wiper sections retain various hole patterns with slots to allow the pre-wiper sections to be height adjusted relative to the wrench extension during an installation interruption in order to locate the insert template, which is installed by the extended Ausziehbohlenteil or a screed widening part, to limit the Einbaugutvorlage in the field of auger to an optimum height. However, during installation, the paving material distribution can no longer be set according to the respective installation thickness.

The invention has for its object to provide a paver, with the very large working widths are manageable and in the simultaneous relief of the screed systems a common height adjustment of the auger and the pre-scraper during installation is possible.

The stated object is achieved with the features of claim 1.

Since the pre-wipers acting at least in the areas of the screed widening parts are supported on the channel plates, the screed is relieved of forces from the dislocation resistance of the paving material. This makes it possible to set an even larger working width with the same rigidity of the screed, without affecting the flatness of the road surface. The original height, which limits the pre-scraper in front of the Ausziehbohlenteilen and a screed widening part, and the original height in the auger area can be varied during installation by changing the height of the auger on the chassis together with the channel plates and pre-scrapers to the complete Install the distribution of the respective installation thickness accordingly. An additional height fine adjustment of the pre-wipers is, e.g. by a spindle, during the installation operation possible. With this concept, the levelness of the surface interfering disturbing forces on the screed are also avoided from the start and / or a change in the speed of the auger, because such disturbing forces are kept away from the screed and introduced into the chassis.

In an expedient embodiment, for larger working widths in the working direction in front of the extended auger, between the end of the auger and the end of the auger each standing channel plates arranged which carry the extended Ausziehbohlenteilen and the screed widening parts associated pre scrapers, and together with the worm suspension via the drive on the chassis are height adjustable.

Particularly expediently, a pre-wiper or pre-wiper section carried by the channel plates additionally has at least one manually or by a drive operable Height fine adjustment on, which makes it possible to adjust the Vorabstreifer in addition relative to the auger and regardless of an operation of the drive for height adjustment of the screw suspension in height. The minimum paving object height can thus be set at least in front of the screed widening part, regardless of the size of the paving material in the central region of the screed.

In an expedient embodiment, the screed has a roof profile adjustment device. In order to adjust at least approximately according to a set roof profile relative to the auger extension, the pre-wiper or Vorabstreifer section, preferably by means of Höhenfeinverstellvorrichtung, adjustable to adjust the optimal Einbaugutvorlagenhöhe also according to the roof profile to the well supported by the channel sheet pre-wiper or Vorabstreifer section to be able to.

In another embodiment, the at least one pre-wiper portion associated with the extended pullout portion and the corresponding channel plate portion, even without existing auger extension, are commonly supported on the auger to not apply deleterious forces to the screed portion in this area.

In a further embodiment, the pre-scraper section associated with the extended pullout section, the corresponding channel louver section, and the auger extension are cooperatively supported on the auger suspension to prevent harmful forces from being applied to the screed or screed section in that area.

Especially for very large working widths, it is expedient if the channel plate, and on the channel plate and the pre-wiper, are additionally supported on at least one longitudinal member on the chassis or a chassis support side. This side member also stabilizes a mounted auger extension.

The channel plate and the pre-wiper, optionally with a mounted auger extension, may alternatively or additionally be supported on the worm suspension via at least one inclined transverse strut.

A structurally simple and easy to handle height fine adjustment of Vorabstreifers comprises at least one Schraubspindelgetriebe. The screw drive is self-locking and prevents so unwanted self-adjustments of Vorabstreifers. Furthermore, the Schraubspindelgetriebe allows very sensitive height fine adjustments.

In an expedient embodiment, a channel plate provided with a bearing support for supporting the auger extension is attached to the auger. Any further necessary channel plate section is attached to the previous one. Each of a channel plate associated pre-scraper with its fine height adjustment is connected via a Vorabstreiferträger means of a connecting part, preferably a console, with the channel plate. Each assembly of channel plate, bearing support, auger extension, pre-wiper and connector is a rapidly attachable or removable equipment part of the paver.

In a further embodiment, a complete unit of channel plate, bearing support, auger extension, connecting part and Vorabstreifer is connected by means of a support bracket provided on the support bracket via a cross member with the worm suspension. With this concept, a very stable support structure for the interconnected components is achieved.

A mounting assembly for adaptation to a large working width expediently comprises at least one connecting part with a channel plate carrier, optionally with connections for side members, at least one support bracket having at least one bearing support for the worm shaft and optionally a coupling point for a cross strut, at least one connecting part, and one with Schneckenflügeln equipped or equipable auger extension. The respective channel plate portion and / or Vorabstreiferabschnitt can already be pre-assembled thereto.

With reference to the drawings, an embodiment of the subject invention will be explained.

Show it:

Fig. 1

a schematic plan view of a paver for large working widths,

Fig. 2

a side view too Fig. 1 , and

Fig. 3

a schematic plan view of the paver with smaller working width.

Fig. 1 shows in a schematic plan view of main components of a paver F, in particular a paver F for large working widths. A tractor 1 has an unspecified highlighted chassis with a chassis 2. At a rear side 3 of the chassis, at least one worm suspension 4 is height-adjustable by means of a remote-controlled drive 7 in a height guide 8. The worm suspension 4 is in functional connection with a rotary drive, not shown, and supports a behind the traction vehicle 1 transversely oriented auger 6 with a worm shaft 5. Optionally, even two adjacent, height-adjustable worm suspensions 4 are provided for two distribution screw halves.

At the towing vehicle 1 or its chassis arranged tow points 9 side rails 10 are articulated, which tow a arranged behind the tractor 1 screed E. The screed E has a base screed 11, at the rear side not shown guide systems two Ausziehbohlenteile 12 are continuously off and inserted arranged. The Ausziehbohlenteile 12 allow a continuous variation of the working width of the screed E between the defined by the width of the base board 11 base width and a defined by the fully extended Ausziehbohlenteile 12 larger working width. In order to be able to increase the working width in stages even further, plank broadening parts 13 are flanged onto the Ausziehbohlenteile 12 successively. On the outer sides of the screed E, regardless of whether only worked with the Ausziehbohlenteilen 12 or with broadening parts 13, if necessary, side shields 14 are mounted.

In installation direction R before the auger 6 standing channel plates 15 are arranged, the ( Fig. 2 ) prevent an inserted in the area of the auger 6 on the planum refuse product template 27 on the path in working direction R. The channel plates 15 are composed for example of sections 15a, corresponding to the respective working width. The channel plates 15 may be supported by obliquely inwardly extending side members 16 on the chassis or chassis outer sides 17.

In the outer regions of the distributor screw 6, this is adaptable by optionally attachable distributor screw extensions 19a, 19b, 19c of the respective working width. A worm shaft portion 5a can be replaced by, for example, at least one, in Fig. 2 shown bearing support 35 to be supported. In working direction R behind the auger 6 and before the Ausziehbohlenteilen 12 and each plank widening part 13 is a standing arranged pre-scraper 20, for example, composed of Vorabstreiferabschnitten 20 a, arranged wherein at least the Vorabstreiferabschnitte 20 a, which are assigned without structural connection with these the plank widening parts 13, are supported by the channel plates 15.

Each auger extension 19a, 19b, 19c may include an optional mounting assembly (FIG. Fig. 1, 2 ) with an inverted U-shaped, approximately parallel to Einbaufahrtrichtung R stationary connecting part 21, a support bracket 34, at least one bearing support 35, and Kanalblech- and Vorabstreiferträgern 33, 26 be. Optionally, at least one channel plate portion 15a and at least one Vorabstreiferabschnitt 20a are mounted, the latter as an option with a height fine adjustment H. In the bearing support 35, a portion 5a of the worm shaft 5 may be held, which is equipped with Schneckenflügeln 6a of the auger 6 or equippable. At the connecting part 21 or the support bracket 34 may be provided for cross braces 18 Anlenkstellen. At least one channel plate carrier 33 may have at least one coupling point for a longitudinal member 16.

The screed E can be equipped with a roof profile adjustment device 31, 32, ie, the base screed 11 is divided centrally into two pivotable about a lower longitudinal axis 31 baseboard parts, which are bent by means of an example designed as a screw spindle actuator 32 from a relatively stretched position , An adjusted roof profile also affects the Ausziehbohlenteile 12 and the plank widening parts 13. The pre-wiper 20 or its sections 20a can also be adjusted in accordance with a set roof profile relative to the distributor screw 6, e.g. by means of the height fine adjustment H. The Vorabstreiferabschnitte 20 a are each supported by at least one connecting part 21, and are supported against tilting.

Fig. 2 shows that the worm suspension 4 in the vertical guide 8 at the rear end 3 of the chassis is height adjustable, by means of at least one drive 7 (eg a hydraulic cylinder), which can be actuated remotely during installation, for example, from the cab of the paver F, or from a suitable external control point on the screed E.

From the screed E (whose base screed 11 in Fig. 2 not shown) is the Ausziehbohlenteil 12 can be seen, which has at its end side attachment points 30 either for attaching the side plate 14 or a first screed widening part 13. Of the Ausziehbohlenteil 12 and attached thereto plank widening parts 13 build from the Einbaugutvorlage 27 a ceiling layer 29 with a predetermined thickness, the Einbaugutvorlage 27 between the channel plate 15 and the Vorabstreifer 20 is relatively high, but from Vorabstreifer 20 to an optimum level 28 is limited.

The portion 5a of the worm shaft 5 of a mounted auger extension 19a, 19b, 19c is held in the at least one bearing support 35 which is connected to the support bracket 34 or the connection part 21, e.g. is attached to the channel plate carrier 33. The support bracket 34 or each or one of the connecting parts 21 may be supported on the worm suspension 4 via an oblique transverse strut 18.

The channel plate carrier 33 is supported on the support bracket 34 via a locking pin 36 on a pair of superposed in a triangular composite longitudinal member 16 on the chassis or a chassis support against tilting. The channel plate sections 15 a are fastened to the channel plate carriers 33. At Konsol 23 Vorabstreiferträger 26 is arranged, which is either block-shaped or extends in the transverse direction limited. The pre-wiper 20 is arranged on the pre-wiper carrier 26, wherein the height fine adjustment H is arranged between the bracket 23 and the pre-wiper carrier 26 or the pre-wiper 20 or the pre-wiper section 20a and the pre-wiper carrier 26, for example a screw-spindle drive 24 which can be operated manually or remotely by means of a drive. For manual actuation, for example, a ratchet lever 25 is provided. Vorabstreifer 20 or Vorabstreiferabschnitt 20a can thus be adjusted according to a set roof profile relative to the auger 6. Alternatively, it would be possible to tilt the pre-wiper 20 or the pre-wiper sections 20a by means of slot connections or the like to the pre-wiper carriers 26.

The height fine adjustments H are also actuated during installation, as well as the worm suspension 4 with the auger 6 is infinitely adjustable in height during installation. The longitudinal members 16 may be connected to the chassis or chassis support with universal joints or other joints, for example, so that they join in height movements of the screw suspension 4. The cross strut 18 follows height movements of the worm suspension 4 in any case. The cross strut 18 is also in Fig. 1 indicated, wherein it acts in the region of the most inner connecting part 21. There could be further cross members 18 also provided to further connecting parts 21 or auger extensions 19b, 19c.

Since the Vorabstreifer 20 is supported by the channel plate 15 and channel plate carrier 33, and is supported on the channel plate support 33 and the locking pin 36 and the side members 16 against tipping, all loads resulting from the Versetzungswiderstand of the material to be inserted in the Einbaugutvorlage 27 to the auger extensions 19a, 19b, 19c and the pre-wiper 20, introduced directly or indirectly into the chassis of the towing vehicle 1, and kept away from the screed E, the Ausziehbohlenteilen 12 and the screed widening parts 13. This results in a noticeable relief of the screed E at large working widths, so that the screed E with the same stiffness as in the prior art tolerates larger working widths and yet a good flatness of the ceiling layer 29 is achieved.

It is expedient to support further inner Vorabstreiferabschnitte 20 a to the channel plates 15.

If installed only with the screed width, the channel plates 15, the pre-scrapers 20 and the distributor screw extensions 19a-19c can be dismantled and the side shields 14 mounted on the retracted Ausziehbohlenteilen 12.

Is according to Fig. 3 installed only with the base beam 11 and the Ausziehbohlenteilen 12, if necessary, only the auger extensions 19a and the inner portions 15a, 20a of the channel plate 15 and the Vorabstreifers 20 are mounted. Then also not used longitudinal beams 16 and / or cross struts 18 are removed or omitted. The more the working width is then increased in stages by means of screed widening parts 13, the more sections of the channel plate 15 and the preliminary scraper 20, if appropriate also distributor screw extensions 19b, 19c and longitudinal members 16 and / or cross struts 18 are mounted.

There may be, e.g. to increase the rigidity, the channel plate and / or Vorabstreiferabschnitte 15a, 20a in the respective abutment area butt-flanged or overlapping but stably connected, or there is a Kanalblech- or Vorabstreiferträger placed where there is a joint, so that each auger extension 19a , 19b, 19c is a rigid and torsion-resistant structure, and mutually connected structures support each other stable, even if only one cross member 18 or only a few longitudinal members 16 are mounted.

Claims (12)

Road paver (F), with
a towing vehicle having a chassis (1),
a screed (E) hinged to the chassis and having at least one screed part (12) which is adjustable for stepless variation of the working width and to which at least one screed broadening part (13) can be mounted for stepwise further widening of the working width;
a by means of a drive (7) by means of a drive (7) during installation steplessly height-adjustable mounted auger (6), at the standing for gradual adaptation to the working width in working direction in front of the auger (6) by means of at least one screw suspension (4) at the chassis rear end (3) Channel plates (15 with at least one auger extension (19) are mountable, and
at least the preliminary Ausziehbohlenteil (12) and each mounted widening part (13), standing in the working direction (R) behind the auger (6) arranged Vorabstreifern (20), which are composed for the stepwise adaptation to the working width of sections (20a),
characterized in that at least one of the assembled screed widening part (13) associated Vorabstreiferabschnitt (20a) structurally separated from the screed (E) at least one channel plate (15) and with the auger (6) during installation via the drive ( 7) is height adjustable. Road finisher according to claim 1, characterized in that for larger working widths the auger (6) by Verteilerschneckenverlängerungen (19) widened and in working direction (R) arranged in front, on the auger (4) fixed channel plates (15) with at least one bearing support (35 ) are provided for the auger (6), and that also at least the extended Ausziehbohlenteilen 812) and a screed widening part (13) associated, of the channel plates (15) carried Vorabstreiferabschnitte (20a) together via the drive (7) are height adjustable. Road paver according to claim 1, characterized in that one of the mounted channel plates (15) carried Vorabstreiferabschnitt (20a) is additionally adjustable in height relative to the auger (19) by means of a manually or by a drive operable height fine adjustment (H). Paver according to at least one of the preceding claims, characterized in that the screed (E) has a roof profile adjusting device (31, 32), and that of the channel plates (15) carried Vorabstreiferabschnitt (20a), preferably by means of the height fine adjustment (H) relative to the auger (6) in height, preferably stepwise, is at least approximately adaptable to a set roof profile. Road paver according to at least one of the preceding claims, characterized in that on the worm suspension (4) and a the extended Ausziehbohlenteil (12) associated channel plate portion (15a) is secured with Vorabstreiferabschnitt (20a). Paver according to at least one of the preceding claims, characterized in that on the worm suspension (4) also a the extended Ausziehbohlenteil (12) associated channel plate portion (15a) with Vorabstreiferabschnitt (20a) and auger extension (19) is attached. Paver according to at least one of the preceding claims, characterized in that the channel plate (15), and, preferably, via the channel plate (15) and the Vorabstreifer (20), via at least one longitudinal carrier (16) on a chassis or chassis support side of Towing vehicle (1) is supported. Road paver according to at least one of the preceding claims, characterized in that the mounted auger extension (19) via at least one, the pre-wiper (20) and the channel plate (15) mitragende, oblique cross-strut (18) on the worm suspension (4) is supported. Road paver according to claim 3, characterized in that the additional height fine adjustment (H) of the pre-wiper (20) has at least one screw-spindle transmission (25, 24). Road finisher according to at least one of the preceding claims, characterized in that the channel plate (15) on the screw suspension (4) and each further outwardly placed channel plate section (15a) are mounted on the preceding, further inside channel plate section (15a), that the auger extension ( 19) is mounted on the at least one bearing support (35) on the channel plates (15), and that the pre-wiper (20) and its height fine adjustment (H) arranged on a Vorabstreiferträger (26) and via a connecting part (21), preferably a console , is connected to the respective channel plate (15). Road paver according to claim 10, characterized in that the channel plate (15) and at least one channel plate carrier (33) via the connecting part (21) with the Vorabstreifer (20), the bearing support (35), optionally also a Verteilerschneckenverlängerung (19) and an the bearing support (35) mounted, preferably with the transverse strut (18) coupled support bracket (34) is provided, and that the channel plate carrier (33) is supported by longitudinal members (16) against tilting and for receiving mixed material-related forces. Road paver according to claim 11, characterized in that a mounting assembly of the paver (F) at least the support bracket (34), the channel plate carrier (33), the connecting part (21) and the bearing support (35) with or without auger extension (19), and the Vorabstreiferträger (26) with the Vorabstreifer (20).

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