EP3686345A1 - Road finisher with pivotable material deflector - Google Patents

Abstract

The invention relates to a road paver (1) with a chassis (5) with two traction tracks (83). The road paver (1) further comprises a chassis (3), a crop bunker (7) attached to the chassis (3) at the front of the road paver (1) with respect to an installation direction (F) for receiving paving material and a direction of installation (F) Screed (17) provided on the rear of the paver (1) for compacting paving material. This is attached to the chassis (3) by tie rods (9). The road paver (1) also comprises a lifting device (29) which is designed to raise the chassis (3) relative to the chassis (5) at least in a rear area of the road paver (1). The invention is characterized in that a material deflector (71) which can be pivoted relative to the chassis (3) is arranged between the two traction tracks (83), the road paver (1) comprising a sensor unit (89) which is configured to one Distance of the chassis (3) from a base (85) and / or a lifting movement (i) between the chassis (3) and the chassis (5) and / or the distance (g) of a lower edge (73) of the material deflector (71) to capture the subsurface (85).

Description

The present invention relates to road pavers with a chassis that can be raised relative to the chassis at least in a rear region of the road finisher.

Known asphalt pavers include a bunker for receiving paving material in front of the paver with respect to an installation direction. The paving material is conveyed from the material bunker into a rear area of the paver during installation by means of a suitable longitudinal conveyor. There, the paving material is distributed transversely to the direction of paving by means of a distributor screw, and is thus evenly presented to a paving screed pulled by the paver to compact the paving material.

For example, it is from the DE 2 140 058 A1 known to provide shielding plates in the area of the auger, which support the distribution of the installation material. From the GB 1 355 620 A It is known to provide a joint in such shielding plates, so that part of the plate can deflect in a folding movement when it collides with objects.

It is known from practice to mount the auger in a height-adjustable manner on the chassis of the paver. By adjusting the height of the auger in relation to the chassis, the paver can be adapted for the installation of different layer thicknesses. For example, the auger can be raised in relation to the chassis in order to install thicker layers.

A disadvantage of such a system is that the position of the auger relative to the chassis is changed significantly upwards in order to install very thick layers. This can lead to the situation that the distributor screw at least partially blocks a material outlet of the longitudinal conveyor. This reduces the throughput of paving material to the screed, which is particularly disadvantageous for large layer thicknesses, since an increased amount of paving material is required for this.

From the EP 0 849 398 A1 a road paver is known, the rear area of which can be raised for the installation of large layer thicknesses. This is achieved by means of a vertical guide which can be adjusted in height by means of a hydraulic actuating cylinder between a crawler chassis and a chassis of the paver in the rear area of the paver. In a front area, the chassis is rotatably mounted on the crawler track. The disadvantage of this system are the high ones Loads on the hydraulic actuating cylinders, which essentially carry the weight of the chassis completely. Correspondingly high forces are required for height adjustment. The paver's stability also suffers.

Other pavers with a chassis that can be raised at least in a rear area are from the US 4,801,218 A and the US 3,901,616 A known. Here, too, high forces act on hydraulic actuating cylinders, which essentially carry the weight of the chassis completely.

From the "CR600 SERIES PAVERS & MTV" brochure from BOMAG, another system for lifting the chassis relative to the chassis in the rear area of a paver is known as the "Frame Raise System". In this system, a large circular disc is arranged vertically on the chassis in the installation direction of the paver. The disk is rotatably supported on the chassis along its circumference. Thus, the disc can be rotated about a main axis of rotation running through its center, transverse to the direction of installation. Eccentrically to the main axis of rotation, a connection to the chassis of the road paver is provided on an outer surface of the disk, which connection is rotatable about a secondary axis lying transverse to the direction of installation. The disk can be rotated in its storage on the chassis by means of a hydraulic cylinder. When the disk rotates, the mutual height relationship between the chassis and the chassis in a rear area of the paver changes due to the eccentricity of the connection between the disk and the chassis. Although in this system the weight of the chassis no longer has to be borne entirely by the hydraulic cylinder, it still has to exert high forces to rotate the disk when the chassis is lifted. Even when the chassis is held at a certain height, high loads are exerted on the hydraulic cylinder.

By lifting the chassis, the distance between the chassis and the surface is increased, so that there is a space in which the installation material can penetrate. This can increase the period of time in which the paving material under the chassis cools down before it is compacted by the screed. Separations can also occur. Both can lead to a deterioration in the quality of the installed asphalt surface.

It is an object of the invention to improve road pavers with a chassis that can be raised in the rear area by measures that are as simple as possible in terms of construction in such a way that the quality of the installed asphalt layer is increased.

This object is achieved by a paver with the features of claim 1. Advantageous further developments are specified in the dependent claims.

The road paver according to the invention comprises a chassis with two traction tracks and a chassis. It also includes a bunker attached to the chassis at the front of the paver to accommodate paving with respect to an installation direction and a screed to compact paving from the paver at the rear with respect to the installation direction, which is attached to the chassis by tie bars. In addition, it comprises a lifting device which is designed to lift the chassis relative to the chassis at least in a rear area of the paver. The road paver according to the invention is characterized in that a material deflector which is movable, in particular pivotable, relative to the chassis is arranged between the two traction lanes.

As an alternative to a swiveling design, a displaceable material deflector is also conceivable. Such a can be designed as a slidable plate. A slidable plate can e.g. B. can be slidably received in a recess on or in the chassis and pushed out of this to extend the material deflector. It should be clear to the person skilled in the art that pivotable material deflectors on the one hand and extendable material deflectors on the other hand can have different advantages and technical effects. In the following, the terms "extended / collapsed" and "extended / retracted" as well as "extended / retracted" and "expand / collapse" are used synonymously, although the variants are not obvious equivalents.

Areas that essentially extend in the direction of travel and in which traction elements of the paver's undercarriage are in engagement with the ground can be regarded as traction traces in order to ensure the propulsion and directional accuracy of the paver. The undercarriage can be designed as a chain undercarriage or a wheel undercarriage and support the chassis. The arrangement of the material deflector between the traction tracks can prevent the installation goods from penetrating into the space between the traction tracks or between the chassis and the ground. The movable design of the material deflector can on the one hand ensure that its arrangement can be adapted to different lifting heights of the chassis. On the other hand, when not in use, for example when the chassis is completely lowered, the material deflector can be carried along on the paver in a folded position. This can make disassembly after lowering as well as assembly during or before lifting unnecessary.

It is advantageous if an actuator unit is provided which is configured to move the material deflector relative to the chassis, in particular to pivot it.

A sensor unit is also conceivable, which is configured to detect a distance of the chassis from a base and / or a lifting movement between the chassis and the chassis and / or the distance from a lower edge of the material deflector to the base. This enables monitoring, control or regulation of the lifting process and / or the swiveling process of the material deflector.

It is particularly advantageous if the actuator unit is configured to move, in particular to pivot, the material deflector based on signals generated by the sensor unit. In this way, the (swivel) position of the material deflector can be adapted to one or more of the above-mentioned parameters that can be detected by the sensor unit. It is conceivable, for example, that the distance between the lower edge of the material deflector and the surface is continuously recorded and that it can be kept constant by regulating the (swivel) position of the material deflector even when the chassis is raised.

It is particularly advantageous if a distance between the ground and a lower edge of the material deflector is always the same size or greater than the minimum ground clearance of the paver.

In various variants, the actuator unit can comprise an electrical, hydraulic, electrohydraulic or pneumatic actuator.

In further variants, the sensor unit can have a laser sensor, a radar sensor or an ultrasonic sensor.

It is advantageous if the lifting device comprises a rocker, which is mounted on a chassis-side bearing surface and can be rotated about a chassis axis of rotation and is rotatably mounted on a chassis-side bearing surface about a chassis axis of rotation. The storage area on the chassis side can be a storage area that is part of the chassis or is at least firmly connected to the chassis. The storage area on the chassis side can be a storage area that is part of the chassis or is at least firmly connected to the chassis.

The chassis axis of rotation and the chassis axis of rotation are preferably parallel to one another and in particular each run in a horizontal plane and perpendicular to the direction of installation, that is to say in a transverse direction of the paver. In particular, the chassis axis of rotation and the chassis axis of rotation is not identical. The chassis axis of rotation and the chassis axis of rotation are preferably offset parallel to one another.

It is particularly advantageous if the lifting device also comprises a length-adjustable adjusting element which connects a chassis-side articulation point with a rocker-side articulation point and is configured to change a distance between the chassis-side articulation point and the seesaw-side articulation point and thus to change the chassis the chassis can either be raised or lowered. The articulation point on the chassis side can be an articulation point that is part of the chassis or at least firmly connected to the chassis. The rocker-side articulation point can be a articulation point that is part of the seesaw or is at least firmly connected to the seesaw.

In particular, the length-adjustable adjusting element can be articulated to the chassis-side articulation point and the rocker-side articulation point. Preferably, a first end of the length-adjustable adjustment element is articulated to the chassis-side articulation point and a second end of the length-variable adjustment element is articulated to the rocker-side articulation point. However, it is also conceivable that the length-adjustable adjusting element extends on one or both sides beyond the respective articulation point.

In a further variant, the paver can comprise a coupling mechanism which is configured to pivot the material deflector relative to the chassis when the lifting device lifts the chassis relative to the chassis. With such a coupling mechanism, the swivel position of the material deflector can be automatically adjusted to the height of the chassis.

In an advantageous variant, the coupling mechanism can have a deflection lever which is rotatably attached to the chassis.

It is conceivable for the coupling mechanism to comprise a regulating or control unit which is connected to the sensor unit and the actuator unit, the regulating or control unit actuating the actuator unit as a function of signals received from the sensor unit.

It is also conceivable that a chassis protection is provided which is arranged behind one of the traction tracks in the direction of installation. This can prevent the installation goods arrives at the paver's traction elements and can, for example, negatively influence their traction properties there. In addition, disadvantages, as already described above with reference to the installation material coming under the chassis, can be avoided.

It is conceivable that the chassis protection is covered by the latter towards a rear of the road paver in a position of the chassis which is at a maximum lowered relative to the chassis and can be exposed by lifting the chassis. Such a configuration can have the advantage that no additional mechanism is required to bring the chassis protection into a desired position. Rather, the undercarriage protection can be provided in a suitable position and can only be used when the chassis is raised.

In a further variant, the actuator unit and or the coupling mechanism can have an elastic element. Such an elastic element can prevent damage to the actuator unit or the coupling mechanism, for example if the material deflector encounters or is blocked by objects when moving and / or swiveling or when driving the paver finisher. The elastic element can be prestressed.

It is particularly favorable if the elastic element is configured to be deflected when the movement and / or pivoting of the material deflector is blocked. Depending on the design of the elastic element, a deflection can be understood to mean a change in length or generally a change in dimensions, torsion or reversible deformation.

In the following, the distance between two axes or between an axis and a bearing surface can be defined as the respective minimum distance.

In a variant, a distance between the chassis axis of rotation and the chassis axis of rotation can be greater than a distance between the chassis axis of rotation and the chassis-side bearing surface. This can mean that the chassis axis of rotation lies outside the bearing of the rocker on the chassis. This enables improved power transmission to be achieved when lifting or holding the chassis. In addition, the lifting device can be made compact.

The length-adjustable adjusting element is preferably configured to change the position of the rocker in relation to the chassis or the chassis by changing its length. The position of the rocker can thus provide clearly defined operating states, which can be set, for example, as discrete settings, especially when the lifting device allows a continuous adjustment of the height of the chassis in relation to the chassis.

Preferably, the ratio of the amount of the portion of the connection vector between the rocker-side articulation point and the chassis axis of rotation perpendicular to the longitudinal direction of the length-adjustable adjusting element is to the amount of the portion of the connection vector extending in a horizontal direction between the chassis axis of rotation and the chassis -Axle of rotation greater than 0.5, than 0.7, as 1, as 1.3, as 1.5 or as 2. Because of a leverage effect, particularly good power transmission when lifting or holding the chassis is achieved by the length-adjustable adjusting element. The ratio described can be above one of the limit values mentioned, in particular over the entire setting range of the chassis height. However, it may also be sufficient if this is the case when the chassis is in a maximally lowered or a maximally raised state or in at least an intermediate lifting state of the chassis.

The length-adjustable adjusting element preferably extends at least substantially along a horizontal direction. Thus, the weight of the chassis, which acts at least essentially along a vertical direction, is at least partially absorbed by the rocker or the chassis-side and the chassis-side bearing surface and does not have to be carried completely by the length-adjustable adjusting element. This contributes to the stability of the entire arrangement. That the variable-length adjustment element extends at least substantially along a horizontal direction can mean that a horizontal component of the direction of extension of the variable-length adjustment element is greater than a vertical component of the extension direction of the variable-length adjustment element, and / or that an inclination angle between the variable-length adjustment element and a horizontal plane does not exceed 10 °, 15 °, 25 ° or 45 °.

The chassis-side articulation point is preferably at least in some operating positions with respect to the installation direction in front of or behind the chassis axis of rotation and / or the chassis axis of rotation. A good power transmission can be achieved due to a leverage effect.

A lower stop can be provided on the chassis, which is configured to secure the chassis against further lowering by engaging the rocker when the chassis is in a maximally lowered state. In this way, the length-adjustable adjusting element is relieved when the chassis is lowered to the maximum. In addition, the maximum lowered state of the chassis defined by the stop. The lower stop also serves as a safeguard in the event of a lifting device malfunction.

An upper stop can be provided on the chassis, which is configured to secure the chassis against further lifting by engagement with the rocker when the chassis is in a maximally raised state. Such an upper stop serves as a safeguard against overtightening of the lifting device.

The length-adjustable adjusting element can be a hydraulic cylinder. A hydraulic cylinder can be easily integrated into a hydraulic system that is normally provided on a paver and allows the transfer of large forces. Alternatively, the length-adjustable adjusting element could also be a spindle drive. A purely mechanical solution could thus be achieved.

The paver can further comprise an actuator for changing the length of the length-adjustable adjusting element. Such an actuator can be, for example, a hydraulic pump for actuating a hydraulic cylinder or a motor for actuating a spindle drive. In addition, a control element for controlling the actuator for selectively raising or lowering the chassis relative to the chassis can be provided. The control element can allow a vehicle driver to adjust the height of the chassis by means of actuating elements.

A locking element is preferably provided, which is configured to mechanically lock the rocker in a defined relative position with respect to the chassis. In this way, the chassis can be mechanically held at a defined height, thus relieving the adjustable element. The locking element can be designed to lock the rocker only in a predetermined relative position with respect to the chassis, in particular in a position corresponding to a transport height of the chassis.

The locking element can be a locking bolt provided on the chassis, which can be extended for locking engagement with a locking structure, for example an opening or a depression, of the rocker. In particular, the locking element can be extended horizontally, in particular perpendicularly to the direction of installation.

The chassis can be pivotally attached to the chassis in the front area of the paver, so that when the chassis is lifted asymmetrically along the installation direction, no tension occurs between the chassis and chassis.

In order to avoid tension, the chassis can be attached to the chassis in a front area of the paver with longitudinal displacement relative to the direction of installation.

The paver preferably includes a distributor screw for distributing paving material in front of the screed transversely to the direction of paving. The road paver can furthermore comprise a conveying device for conveying paving material from the material bunker to the distributor screw. The auger can be fixed to the chassis in a fixed position relative to the chassis. Since the chassis can be lifted in relation to the chassis as a whole, the height of the auger in relation to the chassis can be dispensed with and greater stability can be achieved. When lifting the chassis with the auger attached as a whole, the mutual spatial relationship between the auger and a material outlet of the conveyor is not changed. There is no blockage of the material outlet when lifting the chassis to achieve great installation thicknesses.

Figur 1

eine schematische Seitenansicht eines Straßenfertigers gemäß einer Ausführungsform;

Figur 2

eine schematische Perspektivansicht des Chassis und des Fahrwerks des Straßenfertigers gemäß der Ausführungsform;

Figur 3

eine schematische Perspektivansicht auf die Wippe einer Anhebeeinrichtung des Straßenfertigers gemäß der Ausführungsform;

Figur 4A

eine schematische Seitenansicht auf das Fahrwerk und das Chassis des Straßenfertigers gemäß der Ausführungsform in einer maximal abgesenkten Position des Chassis;

Figur 4B

eine schematische Seitenansicht auf das Fahrwerk und das Chassis des Straßenfertigers gemäß der Ausführungsform in einer maximal angehobenen Position des Chassis; und

Figur 5

eine schematische Perspektivansicht auf einen in Fahrtrichtung vorne an dem Straßenfertiger gemäß der Ausführungsform gelegenen rechten Verbindungs-bereich zwischen Fahrwerk und Chassis.

Figur 6A

eine schematische Perspektivansicht auf ein Chassis gemäß einem Ausführungsbeispiel mit einem ausgeklappten Materialabweiser und einem Koppelmechanismus.

Figur 6B

die Ansicht aus Figur 6A mit eingeklapptem Materialabweiser.

Figur 7A

eine schematische Rückansicht eines Chassis mit zwei Fahrwerken gemäß dem Ausführungsbeispiel aus den Figuren 6A und 6B in einer angehobenen Position des Chassis.

Figur 7B

die Ansicht aus Figur 7A in einer abgesenkten Position des Chassis.

Figur 8

eine schematische Darstellung eines eine Regel- oder Steuereinheit aufweisenden Koppelmechanismus gemäß einem Weiteren Ausführungsbeispiel.

Figur 9A

eine schematische Seitenansicht eines abgesenkten Chassis mit Fahrwerk gemäß einem Ausführungsbeispiel mit Fahrwerkschutz.

Figur 9B

die Ansicht aus Figur 9A mit gegenüber dem Fahrwerk angehobenem Chassis.

The invention will be explained in more detail below on the basis of exemplary embodiments with reference to the figures. Show

Figure 1

is a schematic side view of a paver according to an embodiment;

Figure 2

is a schematic perspective view of the chassis and the chassis of the paver according to the embodiment;

Figure 3

is a schematic perspective view of the rocker of a lifting device of the paver according to the embodiment;

Figure 4A

is a schematic side view of the chassis and chassis of the paver according to the embodiment in a maximum lowered position of the chassis;

Figure 4B

is a schematic side view of the chassis and chassis of the paver according to the embodiment in a maximum raised position of the chassis; and

Figure 5

a schematic perspective view of a right in the direction of travel at the paver according to the embodiment located right connection area between the chassis and chassis.

Figure 6A

is a schematic perspective view of a chassis according to an embodiment with a material deflector and a coupling mechanism.

Figure 6B

the view Figure 6A with folded material deflector.

Figure 7A

is a schematic rear view of a chassis with two chassis according to the embodiment of the Figures 6A and 6B in a raised position of the chassis.

Figure 7B

the view Figure 7A in a lowered position of the chassis.

Figure 8

a schematic representation of a regulating or control unit coupling mechanism according to a further embodiment.

Figure 9A

is a schematic side view of a lowered chassis with chassis according to an embodiment with chassis protection.

Figure 9B

the view Figure 9A with the chassis raised compared to the chassis.

Fig. 1 shows a schematic side view of a paver 1 according to the invention according to one embodiment. The road paver 1 comprises a chassis 3 and a chassis 5, in the present case a track chassis. In the installation direction F at the front of the chassis 3, a crop bunker 7 is attached to accommodate the crop. On both lateral sides of the paver 1 with respect to the installation direction F, a pull arm 9 is held on the chassis 3 via a height-adjustable articulation point 11. The articulation point 11 can be adjusted in height by means of an articulation hydraulic cylinder 13 on the paver 1. On a rear side of the road finisher 1, the tension arms 9 are again attached to the chassis 3 on both sides via height-adjustable rear hydraulic cylinders 15. A screed 17 for compacting paving material is suspended from the rear end of the tension arms 9 with respect to the installation direction F. During paving, the screed 17 is pulled by the pull arms 9 floating on the paving material behind the paver 1. In the chassis 3, a conveying device 19 is provided for conveying paving material from the bunker 7 into a rear area of the paver 1. In the rear area of the road finisher 1, the paving material leaves the conveyor device 19 through a material outlet 21 and arrives at a distributor screw 23 fixedly attached to the chassis 3 for distributing paving material in front of the screed 17 transversely to the paving direction F. The distributor screw 23 and the material outlet 21 are shown in FIG Fig. 1 covered but in Fig. 2 shown. On the chassis 3 of the road finisher 1, an operating station 25 is provided, which space for an operator offers and includes control units 27 for making inputs for controlling the paver 1.

Fig. 2 shows a schematic side view of the chassis 5 and the chassis 3 of the road paver 1, various structures, components and claddings provided on the chassis 3 not being shown for reasons of clarity. In a rear region of the chassis 3 with respect to the installation direction F, a lifting device 29 is provided for lifting the chassis 3 relative to the chassis 5 in the rear region of the road finisher 1. The lifting device 29 comprises a rocker 31 and a length-adjustable adjusting element 33 on both lateral sides of the paver 1. The opposite side can be designed analogously.

The rocker 31 is mounted rotatably about a chassis axis of rotation A on a chassis-side bearing surface 35. As in Fig. 2 shown, for this purpose a crawler carrier 37 of the chassis 5 comprises a cylindrical recess 39, the inner wall of which forms the chassis-side bearing surface 35. A cylindrical extension 41 of the rocker 31, which extends along the chassis axis of rotation A, is rotatably received in the recess 39. Alternatively, however, it would also be conceivable for a corresponding recess to be provided in the rocker 31 and for a cylindrical extension of the crawler carrier 37 to be accommodated therein about the axis of rotation A of the chassis. In this case, the bearing surface 35 on the chassis side would be formed by the peripheral surface of the extension.

The rocker 31 is also mounted on a chassis-side bearing surface 43 so that it can rotate about a chassis axis of rotation B. As with the in Fig. 3 shown schematic view of the in Fig. 2 Invisible inner surface of the rocker 31 can be seen, a cylindrical element 45 fixedly attached to the chassis 3 is rotatably received in a corresponding recess 47 of the rocker 31 about the chassis axis of rotation B. The chassis-side bearing surface 43 is provided by an outer circumference of the cylindrical element 45. Alternatively, it would also be conceivable for an extension of the rocker 31 to be accommodated in a corresponding recess in a element fixed to the chassis about the axis of rotation B of the chassis. In this case, an inner peripheral surface of the recess would provide the chassis-side bearing surface 43.

The chassis axis of rotation A and the chassis axis of rotation B are parallel to one another and run in a transverse direction perpendicular to the installation direction F.

As in Fig. 2 a first end of the variable-length adjusting element 33 is connected to a chassis-side pivot point 49 so that it can rotate about an axis of rotation E. A second The end of the variable-length adjustment element 33 is connected to a rocker-side articulation point 51 so that it can rotate about an axis of rotation G. Thus, the variable-length adjustment element 33 connects the chassis-side articulation point 49 with the rocker-side articulation point 51. The axis of rotation E and the axis of rotation G are parallel to one another and to the chassis axis of rotation A and the chassis axis of rotation B and run in a transverse direction perpendicular to the installation direction F .

In the embodiment shown, the length-adjustable adjusting element 33 is a hydraulic cylinder. However, it would also be conceivable to provide another length-adjustable adjusting element 33, such as a spindle drive. The length-adjustable adjusting element 33 can be actuated by means of an actuator 53 to change its length. The actuator 53 can be controlled by means of a control element 55, which in the embodiment shown is a control element in the control station 25 of the road finisher 1, for changing the length of the length-adjustable setting element 33. This can be done in particular based on user input from a paver operator.

By changing the length of the variable-length adjustment element 33 by means of the actuator 53, a distance between the chassis-side articulation point 49 and the rocker-side articulation point 51 is changed. As a result, the position of the rocker 31 with respect to the chassis 5 and the chassis 3 is changed, and the chassis 3 is optionally raised or lowered relative to the chassis 5.

The length-adjustable adjusting element 33 extends at least substantially along a horizontal direction. In the embodiment shown, the chassis-side articulation point 49 lies behind the chassis axis of rotation B and the chassis axis of rotation A with respect to the installation direction F. However, it would also be conceivable for the chassis-side articulation point 49 with respect to the installation travel direction F in front of the chassis axis of rotation B and / or the chassis axis of rotation A lies.

In Figure 4A the chassis 3 is shown in a maximum lowered position relative to the chassis 5. In the embodiment shown, this corresponds to a minimum length of the variable-length adjusting element 33. In the maximum lowered position of the chassis 3, the chassis 3 is secured against further lowering by engagement of the rocker 31 with a lower stop 57 provided on the chassis 3. Is from the in Figure 4A In the state shown, the length of the variable-length adjusting element 33 is increased by means of the actuator 53, the distance between the chassis-side articulation point 49 and the rocker-side articulation point 51 increases Figure 4A shown view rotated clockwise around the chassis axis of rotation A, which in the drawing plane through the center Extension 41 of the rocker 31 goes. As a result, the chassis 3 is raised due to the mounting of the rocker 31 on the chassis-side bearing surface 43, which is rotatable about the chassis axis of rotation B.

If the length of the variable-length adjusting element 33 continues to be extended, the length in FIG Figure 4B shown state reached. Figure 4B shows a maximally raised state of the chassis 3 relative to the chassis 5. In this state, the rocker 31 engages with an upper stop 59 provided on the chassis 3, which further lengthens the length of the variable-length adjustment element 33 and thus further swivels the rocker 31 prevented about the chassis axis of rotation A.

By reducing the length of the variable-length adjustment element 33 again, the chassis 3 can be moved from the position shown in FIG Figure 4B shown position can be lowered again. The chassis 3 is preferably infinitely adjustable in height between the minimally raised state and the maximally raised state by suitably adjusting the length-adjustable adjusting element 33. However, it would also be conceivable to provide several discrete setting options.

As in Fig. 3 shown, a locking element 61 designed as a locking bolt for mechanically locking the rocker 31 in a defined relative position with respect to the chassis 3 is provided in the embodiment shown. The locking element 61 is provided on the chassis 3 and can be extended laterally in a horizontal plane perpendicular to the installation direction F in order to engage a locking structure 63 of the rocker 31 in an extended position. In the embodiment shown, the locking structure 63 of the rocker 31 is designed as a recess. By locking engagement of the locking element 61 with the locking structure 63 of the rocker 31, the rocker 31 is fixed against changing its relative position with respect to the chassis 3 and the chassis 5. The chassis 3 can thus be mechanically secured in a defined height setting, for example in a transport position for transporting the paver 1 between construction sites.

As among others in the 4A and 4B recognizable, a distance d between the chassis axis of rotation B and the chassis axis of rotation A is greater than a distance e between the chassis axis of rotation B and the chassis-side bearing surface 43. The chassis axis of rotation A is therefore outside the mounting of the rocker 31 on the Chassis 3. This results in an improved power transmission when lifting the chassis 3. In addition, the lifting device 29 can obviously be made compact.

In the 4A and 4B The amount f of the portion of the connection vector between the rocker-side articulation point 51 and the chassis axis of rotation A, which is perpendicular to the longitudinal direction of the length-adjustable adjusting element 33, is shown schematically constructed. In addition, the amount x of the portion of the connection vector extending in a horizontal direction between the chassis axis of rotation A and the chassis axis of rotation B is shown schematically constructed. The ratio of these amounts, as f / x, is preferably greater than 0.5, as 0.7, as 1, as 1.3, as 1.5 or as 2. Thus, due to a leverage effect, particularly good power transmission is achieved Raising or holding the chassis 3 achieved by the length-adjustable adjusting element 33.

In the embodiment shown, the chassis 3 can be pivoted in a region of the road paver 1 which is at the front with respect to the installation direction F and is longitudinally displaceable on the chassis 5 with respect to the installation direction F. In this way, the chassis 3 can be raised or lowered in the rear area of the paver 1 relative to the chassis 5 without generating any tension in the front area of the paver 1. An asymmetrical lifting of the chassis 3 is possible in such a way that the chassis 3 is raised further in the rear area of the paver 1 than in the front area of the paver 1. Fig. 5 shows a schematic side view of a detail of an attachment area 65 located on the right side of the road finisher 1 between the chassis 5 and the chassis 3. On the left side of the road finisher 1 there could be an analogously designed attachment area 65. The undercarriage 5 is pivotable and is longitudinally displaceable on a bearing block 67 of the chassis 3 with respect to the installation direction F. In particular, the undercarriage 5 can be mounted on the bearing block 67 by means of an articulated bearing 69 with an integrated slide bearing.

The view in Figure 6A shows a chassis 3 of a road finisher 1 according to an exemplary embodiment with a material deflector 71. This can be provided on the chassis 3 in a movable, for example pivotable, manner as in the exemplary embodiment shown. The material deflector 71 has a lower edge 73. A coupling mechanism 75 is provided for moving the material deflector 71, ie in the present exemplary embodiment for pivoting. As in the present exemplary embodiment, this can be a mechanical coupling mechanism, in particular a purely mechanical coupling mechanism. In the present exemplary embodiment, the coupling mechanism comprises a bell crank 77 which is rotatably mounted on the chassis 3. This can be connected to a rod 79, which in turn can be connected to the lifting device 29, in the present exemplary embodiment to the rocker 31. The rod 79 can be set up to move the lifting device 29, in particular to transfer a rotation of the rocker 31 to the bell crank 77. The bell crank 77 can be set in rotation.

The rod 79 can have a thread through which the length of the rod 79 can be adjusted. This may allow adjustment of the coupling mechanism 75, e.g. B. to compensate for play and / or tolerances. Such a thread can also be used to specifically adapt the pivoting range of the material deflector 71.

The deflection lever 77 can also be connected to an elastic element 81. The elastic element 81 can in turn be connected to the material deflector 71 such that movement or deflection, for example expansion or compression, of the elastic element 81 causes the material deflector 71 to move, in particular pivot. The components mentioned can interact in such a way that a movement of the lifting device 29 displaces the rod 79, as a result of which the deflection lever 77 can be rotated. The rotation of the deflection lever 77 can in turn move the elastic element 81, as a result of which the material deflector 71 can be moved, in particular pivoted.

The elastic element 81 can be provided on a strut 82. This can serve to prevent the elastic element 81 from kinking. The strut 82 can be made telescopic to allow deflection of the elastic element 81. Similar to the rod 79, the strut 82 can have a thread through which the length of the strut 82 can be adjusted. This can provide another setting option for the coupling mechanism 75, e.g. B. to compensate for play and / or tolerances. Such a thread can also be used to specifically adapt the pivoting range of the material deflector 71. The coupling mechanism 75 can also have a strut 82 without an elastic element 81 being provided thereon. Then any constructions that are not telescopic are also conceivable. However, a thread can also be advantageous in variants without an elastic element 81.

The Figure 6A shows the lifting device 29 in a position in which the chassis 3 is raised relative to the chassis 5. Due to the position of the rocker 31, the material deflector 71 has been moved into an extended position by the interaction of the rod 79, the deflection lever 77 and the elastic element 81. Figure 6B shows the lifting device 29 in a position in which the chassis 3 is arranged in a completely lowered position relative to the chassis 5. In this case, as in the Figure 6B can be seen, the material deflector 71 arranged in a folded position.

In the in Figure 7A shown schematic view, the chassis 3 and the chassis 5 can be seen from behind. Traction tracks 83 are defined by the running gear 5. The material deflector 71 is arranged between the traction tracks 83. In Figure 7A the chassis is raised relative to the running gear 5 and the material deflector 71 is unfolded. The lower edge 73 is arranged at a distance g from a base 85. The distance h is defined between the chassis 3 and the ground 85.

In Figure 7B is the chassis 3 relative to the chassis 5 by a lifting movement i compared to the in Figure 7A shown position lowered. The distance g between the lower edge 73 and the base 85 is opposite Figure 7A stayed the same.

Figure 8 is a schematic representation of the coupling mechanism 75 according to another embodiment. In this exemplary embodiment, the coupling mechanism 75 comprises a control unit 87. Alternatively, however, a control unit can also be provided. Furthermore, the coupling mechanism 75 according to this exemplary embodiment can have a sensor unit 89. This can be configured to measure or determine the distance g between the lower edge 73 and the ground 85 and / or the lifting movement i and / or the distance h between the chassis 3 and the ground 85. The sensor unit 89 can be connected to the control unit 87 in order to transmit measured or detected values to the control unit 87.

The coupling mechanism 75 according to the in Figure 8 The exemplary embodiment shown can furthermore have an actuator unit 91. This can be connected to the control unit 87 in order to receive control signals. In cases where a control unit is provided, the actuator unit 91 can also be connected to it in order to receive control signals. The actuator unit 91 can have an actuator 93. This can be configured to move the material deflector 71, in particular to pivot it. The actuator 93 can be any suitable actuator known to the person skilled in the art. In particular, electrical, hydraulic, electrohydraulic or pneumatic actuators are conceivable, for example an electric or servo motor, or a hydraulic cylinder. Correspondingly, it can be in the control unit 87 z. B. an electrical, hydraulic, electrohydraulic or pneumatic control unit.

Various possibilities are conceivable for regulating or controlling the movement of the material deflector 71. For example, it is conceivable that the sensor unit 89 detects the distance g between the lower edge 73 of the material deflector 71 and the substrate 85 and transmits this to the control unit 87. The control unit 87 can then be configured such that it transmits control signals to the actuator unit 91 based on the received distance cause the actuator unit 91 to control the actuator 93 in such a way that the distance g between the lower edge 73 and the background 85 remains constant.

Alternatively, the sensor unit 89 can detect the lifting movement i and transmit it to the control unit 87. Based on the lifting movement i, this can determine a target position of the material deflector 71, which is assigned to the detected lifting movement i. An assignment of a lifting movement i to a position of the material deflector 71 can be established using mathematical formulas or tables. It is conceivable that the control unit 87 transmits the target position to the actuator unit 91 and this independently controls or regulates the actuator 93 in such a way that the material deflector 71 assumes the received target position. However, it is also conceivable that the control unit 87 itself comprises a controller and only transmits control signals to the actuator unit 91.

In Figure 9A is a side view of a chassis 5 of a paver 1 according to another embodiment. In this embodiment, a chassis protection 95 is provided. For example, as shown in the exemplary embodiment, this can be attached to the crawler carrier 37. In the in Figure 9A shown configuration, the chassis 3 is completely lowered relative to the chassis 5. In this configuration, the chassis protection 95 is covered by the chassis 3 in the direction of travel to the rear. In this configuration, the chassis 3 prevents installation goods from getting into the area of the chassis 5.

In Figure 9B the chassis 3 is raised relative to the chassis 5. As a result, as in the present exemplary embodiment, the chassis protection 95 can be exposed. In this configuration, the undercarriage protection 95 can prevent installation goods from reaching the area of the undercarriage 5. It can also be seen that without the undercarriage protection 95 there would be significantly more space between the lower edge of the chassis 3 and the ground, which would allow the installation goods to get into the area of the undercarriage.

1. 1. Straßenfertiger 1 mit einem Fahrwerk 5 mit zwei Traktionsspuren 83; einem Chassis 3; einem bezüglich einer Einbaufahrtrichtung F vorne am Straßenfertiger 1 an dem Chassis 3 angebrachten Gutbunker 7 zur Aufnahme von Einbaugut; einer bezüglich der Einbaufahrtrichtung F hinten am Straßenfertiger 1 vorgesehenen Einbaubohle 17 zum Verdichten von Einbaugut, welche durch Zugholme 9 an dem Chassis 3 angebracht ist; und einer Anhebeeinrichtung 29, welche dazu ausgelegt ist, das Chassis 3 gegenüber dem Fahrwerk 5 zumindest in einem hinteren Bereich des Straßenfertigers 1 anzuheben, dadurch gekennzeichnet, dass zwischen den zwei Traktionsspuren 83 ein relativ zu dem Chassis 3 bewegbarer, insbesondere schwenkbarer, Materialabweiser 71 angeordnet ist.
2. 2. Straßenfertiger nach Ausführungsbeispiel 1, gekennzeichnet durch eine Aktuatoreinheit 91, die dazu konfiguriert ist, den Materialabweiser 71 relativ zu dem Chassis 3 zu bewegen, insbesondere zu schwenken.
3. 3. Straßenfertiger nach einem der vorangehenden Ausführungsbeispiele, gekennzeichnet durch eine Sensoreinheit 89, die dazu konfiguriert ist, einen Abstand des Chassis 3 von einem Untergrund 85 und/oder einen Anhebeweg i zwischen dem Chassis 3 und dem Fahrwerk 5 und/oder den Abstand g einer Unterkante 73 des Materialabweisers 71 zu dem Untergrund 85 zu erfassen.
4. 4. Straßenfertiger nach den Ausführungsbeispielen 2 und 3, dadurch gekennzeichnet, dass die Aktuatoreinheit 91 dazu konfiguriert ist, den Materialabweiser 71 basierend auf von der Sensoreinheit 89 erzeugten Signalen zu bewegen, insbesondere zu schwenken.
5. 5. Straßenfertiger nach Ausführungsbeispiel 2 oder 4, dadurch gekennzeichnet, dass die Aktuatoreinheit 91 einen elektrischen, hydraulischen, elektrohydraulischen oder pneumatischen Aktuator 93 umfasst.
6. 6. Straßenfertiger nach Ausführungsbeispiel 3 oder 4, dadurch gekennzeichnet, dass die Sensoreinheit 89 einen Lasersensor, einen Radarsensor oder einen Ultraschallsensor aufweist.
7. 7. Straßenfertiger nach einem der vorgehenden Ausführungsbeispiele, dadurch gekennzeichnet, dass die Anhebeeinrichtung 29 eine Wippe 31 umfasst, welche um eine Fahrwerk-Drehachse A drehbar an einer fahrwerkseitigen Lagerfläche 35 gelagert ist, und um eine Chassis-Drehachse B drehbar an einer chassisseitigen Lagerfläche 43 gelagert ist.
8. 8. Straßenfertiger nach Ausführungsbeispiel 7, dadurch gekennzeichnet, dass die Anhebeeinrichtung 29 zudem ein längenveränderliches Einstellelement 33 umfasst, welches einen chassisseitigen Anlenkpunkt 49 mit einem wippenseitigen Anlenkpunkt 51 verbindet, und dazu konfiguriert ist, durch Verändern seiner Länge einen Abstand zwischen dem chassisseitigen Anlenkpunkt 49 und dem wippenseitigen Anlenkpunkt 51 zu verändern und so das Chassis 3 gegenüber dem Fahrwerk 5 wahlweise anzuheben oder abzusenken.
9. 9. Straßenfertiger nach einem der vorangehenden Ausführungsbeispiele, gekennzeichnet durch einen Koppelmechanismus 75, der dazu konfiguriert ist, den Materialabweiser 71 relativ zu dem Chassis 3 zu schwenken, wenn die Anhebeeinrichtung 29 das Chassis 3 gegenüber dem Fahrwerk 5 anhebt.
10. 10. Straßenfertiger nach Ausführungsbeispiel 9, dadurch gekennzeichnet, dass der Koppelmechanismus 75 einen Umlenkhebel 77 aufweist, der drehbar an dem Chassis 3 angebracht ist.
11. 11. Straßenfertiger nach Ausführungsbeispiel 2, 3 und 9, dadurch gekennzeichnet, dass der Koppelmechanismus 75 eine Regel- oder Steuereinheit 87 umfasst, die mit der Sensoreinheit 89 und der Aktuatoreinheit 91 verbunden ist, wobei die Regel- oder Steuereinheit 87 die Aktuatoreinheit 91 in Abhängigkeit von von der Sensoreinheit 89 empfangenen Signalen betätigt.
12. 12. Straßenfertiger nach einem der vorangehenden Ausführungsbeispiele, gekennzeichnet durch einen Fahrwerkschutz 95, der in der Einbaufahrtrichtung F hinter einer der Traktionsspuren 83 angeordnet ist.
13. 13. Straßenfertiger nach Ausführungsbeispiel 12, dadurch gekennzeichnet, dass der Fahrwerkschutz 95 in einer maximal gegenüber dem Fahrwerk 5 abgesenkten Position des Chassis 3 durch letzteres zu einer Rückseite des Straßenfertigers 1 hin verdeckt ist und durch Anheben des Chassis 3 freilegbar ist.
14. 14. Straßenfertiger nach einem der vorangehenden Ausführungsbeispiele, dadurch gekennzeichnet, dass die Aktuatoreinheit 91 und/oder der Koppelmechanismus 75 ein elastisches Element 81 aufweisen.
15. 15. Straßenfertiger nach Ausführungsbeispiel 14, dadurch gekennzeichnet, dass das elastische Element 81 dazu konfiguriert ist, ausgelenkt zu werden, wenn das Bewegen und/oder das Schwenken des Materialabweisers 71 blockiert ist.

The invention also relates to the following exemplary embodiments:

1. 1. paver 1 with a chassis 5 with two traction tracks 83; a chassis 3; a good bunker 7 attached to the chassis 3 in front of the paver 1 with respect to an installation direction F for receiving installation material; a screed 17 provided at the rear of the paver 1 with respect to the paving direction F for compacting paving material, which is attached to the chassis 3 by tie bars 9; and a lifting device 29, which is designed to lower the chassis 3 relative to the chassis 5 at least in a rear region of the Lift paver 1, characterized in that between the two traction tracks 83 there is arranged a material deflector 71 which is movable, in particular pivotable, relative to the chassis 3.
2. 2. Paver according to embodiment 1, characterized by an actuator unit 91, which is configured to move the material deflector 71 relative to the chassis 3, in particular to pivot it.
3. 3. Road paver according to one of the preceding exemplary embodiments, characterized by a sensor unit 89 which is configured to determine a distance between the chassis 3 and a base 85 and / or a lifting movement i between the chassis 3 and the chassis 5 and / or the distance g one To detect the lower edge 73 of the material deflector 71 to the substrate 85.
4. 4. Paver according to the exemplary embodiments 2 and 3, characterized in that the actuator unit 91 is configured to move, in particular to pivot, the material deflector 71 based on signals generated by the sensor unit 89.
5. 5. Paver according to embodiment 2 or 4, characterized in that the actuator unit 91 comprises an electrical, hydraulic, electrohydraulic or pneumatic actuator 93.
6. 6. Road paver according to embodiment 3 or 4, characterized in that the sensor unit 89 has a laser sensor, a radar sensor or an ultrasonic sensor.
7. 7. Road paver according to one of the preceding exemplary embodiments, characterized in that the lifting device 29 comprises a rocker 31 which is mounted on a chassis-side bearing surface 35 and is rotatable about a chassis axis of rotation A and is rotatable about a chassis axis of rotation B on a chassis-side bearing surface 43 is stored.
8. 8. Asphalt paver according to embodiment 7, characterized in that the lifting device 29 also comprises a variable-length adjusting element 33, which connects a chassis-side articulation point 49 with a rocker-side articulation point 51, and is configured to change a distance between the chassis-side articulation point 49 and to change the rocker-side articulation point 51 and thus selectively raise or lower the chassis 3 relative to the chassis 5.
9. 9. Paver according to one of the preceding embodiments, characterized by a coupling mechanism 75, which is configured to the material deflector 71 relative to the Chassis 3 to pivot when the lifting device 29 lifts the chassis 3 relative to the chassis 5.
10. 10. paver according to embodiment 9, characterized in that the coupling mechanism 75 has a bell crank 77 which is rotatably attached to the chassis 3.
11. 11. Asphalt paver according to exemplary embodiments 2, 3 and 9, characterized in that the coupling mechanism 75 comprises a regulating or control unit 87 which is connected to the sensor unit 89 and the actuator unit 91, the regulating or control unit 87 depending on the actuator unit 91 actuated by signals received from the sensor unit 89.
12. 12. Road paver according to one of the preceding exemplary embodiments, characterized by a chassis protection 95, which is arranged in the installation direction F behind one of the traction tracks 83.
13. 13. paver according to embodiment 12, characterized in that the chassis protection 95 in a maximum lowered position relative to the chassis 5 of the chassis 3 is covered by the latter to a rear of the paver 1 and can be exposed by lifting the chassis 3.
14. 14. Paver according to one of the preceding exemplary embodiments, characterized in that the actuator unit 91 and / or the coupling mechanism 75 have an elastic element 81.
15. 15. Paver according to embodiment 14, characterized in that the elastic element 81 is configured to be deflected when the movement and / or the pivoting of the material deflector 71 is blocked.

Claims (14)

Paver (1) with
a chassis (5) with two traction tracks (83);
a chassis (3);
a crop bunker (7) attached to the chassis (3) on the front of the road paver (1) with respect to an installation direction (F) for receiving installation material;
a screed (17) provided on the road paver (1) with respect to the paving direction (F) for compacting paving material, which is attached to the chassis (3) by tie bars (9); and
a lifting device (29) which is designed to raise the chassis (3) relative to the chassis (5) at least in a rear region of the road paver (1),
characterized,
that between the two traction tracks (83) there is arranged a material deflector (71) which can be moved, in particular pivoted, relative to the chassis (3), the paver (1) comprising a sensor unit (89) which is configured to set a distance between the chassis (3) from a base (85) and / or a lifting movement (i) between the chassis (3) and the chassis (5) and / or the distance (g) from a lower edge (73) of the material deflector (71) to the base (85). Paving machine according to claim 1, characterized by an actuator unit (91) which is configured to move, in particular to pivot, the material deflector (71) relative to the chassis (3). Paving machine according to claim 2, characterized in that the actuator unit (91) is configured to move, in particular to pivot, the material deflector (71) based on signals generated by the sensor unit (89). Paver according to claim 2 or 3, characterized in that the actuator unit (91) comprises an electrical, hydraulic, electrohydraulic or pneumatic actuator (93). Paver according to one of the preceding claims, characterized in that the sensor unit (89) has a laser sensor, a radar sensor or an ultrasonic sensor. Road paver according to one of the preceding claims, characterized in that the lifting device (29) comprises a rocker (31) which is rotatably mounted about a chassis axis of rotation (A) on a chassis-side bearing surface (35), and about a chassis axis of rotation ( B) is rotatably mounted on a chassis-side bearing surface (43). Paver according to claim 6, characterized in that the lifting device (29) further comprises a variable-length adjusting element (33) which connects a chassis-side articulation point (49) to a rocker-side articulation point (51) and is configured to change a distance by changing its length to change between the chassis-side articulation point (49) and the rocker-side articulation point (51) and thus optionally raise or lower the chassis (3) relative to the chassis (5). Paver according to one of the preceding claims, characterized by a coupling mechanism (75) which is configured to pivot the material deflector (71) relative to the chassis (3) when the lifting device (29) the chassis (3) relative to the chassis ( 5) lifts. Paving machine according to claim 8, characterized in that the coupling mechanism (75) has a bellcrank (77) which is rotatably attached to the chassis (3). Paving machine according to claims 2 and 8, characterized in that the coupling mechanism (75) comprises a regulating or control unit (87) which is connected to the sensor unit (89) and the actuator unit (91), the regulating or control unit (87 ) actuates the actuator unit (91) as a function of signals received from the sensor unit (89). Asphalt paver according to one of the preceding claims, characterized by a chassis protection (95) which is arranged behind one of the traction tracks (83) in the direction of installation (F). Paving machine according to claim 11, characterized in that the chassis protection (95) in a position of the chassis (3) which is lowered as far as possible relative to the chassis (5) is covered by the latter towards a rear side of the paver (1) and by lifting the chassis (3 ) is exposed. Paver according to one of the preceding claims, characterized in that the actuator unit (91) and / or the coupling mechanism (75) have an elastic element (81). Paver according to claim 13, characterized in that the elastic element (81) is configured to be deflected when the movement and / or the pivoting of the material deflector (71) is blocked.

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