ROAD PAVER WITH SUPPORT DEVICE

Abstract

The disclosure relates to a road paver with a height-adjustable screed for installing a pavement layer and at least one support device for carrying and positioning at least one sensor unit. The support device comprises a center bar, at least one extension bar for the center bar, and at least one attachment unit which detachably attaches the extension bar at one end of the center bar. The center bar and the extension bar are by way of the attachment unit relative to one another—when viewed in the vertical projection plane—at a first mounting angle connectable to one another, and the center bar and the extension bar are by way of the attachment unit connectable to one another—when viewed in the vertical projection plane—at at least one further mounting angle.

Claims

1. A road paver comprising: a height-adjustable screed for installing a pavement layer; and a support device configured to carry and position at least one sensor unit, wherein the support device comprises a center bar, an extension bar for the center bar, and an attachment unit configured to detachably attach the extension bar at one end of the center bar, wherein the center bar and the extension bar are connectable to one another, by way of the attachment unit, at a first mounting angle relative to one another when viewed in a vertical projection plane, and wherein the center bar and the extension bar are, by way of the attachment unit, connectable to one another at at least one further mounting angle when viewed in the vertical projection plane.

2. The road paver according to claim 1 wherein the support device comprises an additional extension bar and a further attachment unit, wherein the additional extension bar is by way of the further attachment unit detachably attached to another end of the center bar.

3. The road paver according to claim 2 wherein the two extension bars are attachable to the center bar running parallel to one another at a defined distance.

4. The road paver according to claim 1 wherein the center bar is attached to a screed beam or to a side plate of the screed.

5. The road paver according to claim 1 wherein the attachment unit comprises a hook-in jaw and a locking plate.

6. The road paver according to claim 5 wherein hooks are formed on the locking plate, and bolts are formed on the hook-in jaw for hooking in the hooks.

7. The road paver according to claim 6 wherein the hook-in jaw comprises a first side wall and a second side wall, and wherein the bolts extend between the side walls.

8. The road paver according to claim 7 wherein the bolts of the hook-in jaw comprise a first group of bolts and a second group of bolts, wherein the center bar and the extension bar are connectable to each other at the first mounting angle by coupling the hooks of the locking plate to the first group of bolts, and wherein the center bar and the extension bar are connectable to one another at the further mounting angle by coupling the hooks of the locking plate to the second group of bolts.

9. The road paver according to claim 6 wherein the bolts of the hook-in jaw comprise a first group of bolts and a second group of bolts, wherein the center bar and the extension bar are connectable to each other at the first mounting angle by coupling the hooks of the locking plate to the first group of bolts, and wherein the center bar and the extension bar are connectable to one another at the further mounting angle by coupling the hooks of the locking plate to the second group of bolts.

10. The road paver according to claim 5 wherein the center bar comprise the hook-in jaw at one end, and an additional hook-in jaw at an opposite, and the extension bar at one end comprises the locking plate for coupling to one of the hook-in jaws of the center bar.

11. The road paver according to claim 10 wherein the two hook-in jaws are configured to be mirror-inverted with respect to one another at the ends of the center bar.

12. The road paver according to claim 10 wherein the extension bar comprises a hook-in jaw or a further locking plate at its end facing away from the center bar.

13. The road paver according to claim 1 wherein the first mounting angle is an obtuse angle and the further mounting angle is 180°.

14. The road paver according to claim 1 wherein the attachment unit for securing the extension bar to the center bar comprises a locking bolt which is movable between a locking position and a release position.

15. The road paver according to claim 14 wherein the locking bolt can be secured in the release position.

16. The road paver according to claim 14 wherein the locking bolt can by way of a spring be pressed to the locking position.

17. The road paver according to claim 5 wherein the attachment unit comprises a locking bolt which is movable between a locking position, for securing the extension bar to the center bar, and a release position.

18. The road paver according to claim 1 wherein the support device can be assembled without tools.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0034] FIG. 1 shows a road paver according to the disclosure with a support device attached thereto;

[0035] FIG. 2 shows an enlarged section of the support device according to FIG. 1;

[0036] FIG. 3 shows a bar assembly in a step-shaped embodiment for the support device;

[0037] FIG. 4 shows an upper coupling point for the bar assembly from FIG. 3;

[0038] FIG. 5 shows a lower coupling point for the bar assembly from FIG. 3;

[0039] FIG. 6 shows a bar assembly in a rectilinear embodiment for the support device;

[0040] FIG. 7 shows a rear coupling point for the bar assembly from FIG. 6;

[0041] FIG. 8 shows a front coupling point for the bar assembly from FIG. 6;

[0042] FIG. 9 shows a locking bolt in the locking position;

[0043] FIG. 10 shows the locking bolt from FIG. 9 in the release position;

[0044] FIG. 11 shows a sectional view of the locking bolt in the locking position; and

[0045] FIG. 12 shows a sectional view of the locking bolt in the release position.

DETAILED DESCRIPTION

[0046] Same components are throughout the figures designated with the same reference numerals.

[0047] FIG. 1 shows a road paver 1 with a towed screed 2. Screed 2 is configured to install a new pavement layer 3 onto a road bed 8. Road paver 1 further comprises a material hopper 4 from which the laying material is by way of a transport conveyor (not shown) running within road paver 1 transported to the rear to screed 2 for the installation of pavement layer 3.

[0048] Attached to a screed beam 5 of screed 2 is a support device 6. Support device 6 serves to carry and position at least one sensor unit 7. Sensor unit 7 is, in particular, configured to detect a distance to road bed 8 on which road paver 1 moves. A total of three sensor units 7 is in FIG. 1 arranged on support device 6, where the two sensor units 7—when viewed in the direction of travel F —being at the front each measure a distance to road bed 8 and sensor unit 7′ disposed at the rear end of the support device measures a distance to the new pavement layer 3. Based on the height measurements to road bed 8 and/or to the new pavement layer 3, road paver 1 can by way of a control device 33 perform automatic leveling of screed 2.

[0049] Support device 6 comprises a first and a second pivot arm 9, 9′, by way of which the former is attached to screed beam 5 of road paver 1. Attached to the ends of respective pivot arm 9, 9′ being laterally offset outwardly relative to screed beam 5 are respective clamping devices 10, 10′ which are designed as quick-release fasteners and hold a center bar 11 of support device 6. Center bar 11 is in the direction of travel F of road paver 1 aligned in a forwardly inclined manner with respect to the horizontal direction.

[0050] Attached to an end 12 of center bar 11 in the direction of travel F being disposed at the rear is an extension bar 13 for center bar 11. Center bar 11 and extension bar 13 are—when viewed in the vertical projection plane—connected to each other at a first mounting angle a relative to one another. A further extension bar 13′ is attached further rearwardly on an end 14 of extension bar 13 facing away from center bar 11 for carrying sensor unit 7′ above new pavement layer 3. The two extension bars 13, 13′ are aligned horizontally relative to road bed 8 or to pavement layer 3 paved thereon.

[0051] Attached to an end 15 of center bar 11 in the direction of travel F being disposed at the front is an additional front extension bar 16, which is along its length extended by a further front extension bar 16′ on which sensor unit 7 is carried above road bed 8. Center bar 11 and additional front extension bar 16 are coupled relative to one another at a mounting angle a′, where mounting angle α′ and first mounting angle a are alternate angles, as a result of which extension bar 13 and additional front extension bar 16 are according to FIG. 1 arranged parallel to one another as bar segments in support device 6.

[0052] FIG. 2 shows a section of support device 6 from FIG. 1. FIG. 2 shows that center bar 11 at each respective end 12, 15 comprises a respective attachment unit 18, 18′ which connects extension bar 13 and additional front extension bar 16 to ends 12, 15 of center bar 11. The two extension bars 13, 16 are in FIG. 2 with center bar 11 arranged in a stepped manner and connected to one another by the alternating or Z-angles α, α′.

[0053] FIG. 3 shows only the step-like assembly of center bar 11 with extension bars 13, 16 attached to its respective ends 12, 15. Mounting angles α, α′ are given as alternate angles, i.e., Z-angles, because the two extension bars 13, 16 are running parallel to one another through center bar 11.

[0054] FIG. 4 shows attachment unit 18 in an enlarged view which attaches extension bar 13 to rear end 12 of center bar 11. Attachment unit 18 comprises a hook-in jaw 19 which is formed on center bar 11 and a locking plate 20 which is formed on extension bar 13. Locking plate 20 of extension bar 13 is attached to hook-in jaw 19 of center bar 11 in such a manner that center bar 11 and extension bar 13 are—as seen in the vertical projection plane—connected relative to one another at first mounting angle α.

[0055] FIG. 4 further shows that hook-in jaw 19 comprises a plurality of bolts 21 which are divided into a first group 22 and a second group 23 of bolts 21. Locking plate 20 disposes of two hooks 24 which are attached to first group 22 of bolts 21. The fastening of hooks 24, 24′ to first group 22, 22′ of bolts 21, 21′ at the respective attachment units 18, 18′ results in the formation of a stepped shape between the center bar and the extension bars attached thereto (see FIGS. 4 and 5). The hooking on to the second group 23, 23′ of bolts 21, 21′, on the other hand, results in a rectilinear beam assembly (see FIGS. 7 and 8).

[0056] Hook 24 in FIG. 4 being formed at the bottom locking plate 20 is secured against lower bolt 21 of first group 22 of bolts 21 by way of a locking bolt 25.

[0057] FIG. 5 shows a further attachment unit 18′ which is formed at front end 15 of center bar 11. Attachment unit 18′ at front end 15 of center bar 11 comprises a hook-in jaw 19′ on which a locking plate 20′ is hooked in, which is formed on extension bar 16 and which by way of a locking bolt 25′ formed thereon is secured to hook-in jaw 19′. Hook-in jaw 19′ is in FIG. 5 configured as being mirror-inverted—when viewed in the vertical plane—relative to hook-in jaw 19 of FIG. 4. It is thereby achieved that center bar 11 can be connected to respective extension bars 13, 16 in a step-shaped and rectilinear manner. Locking plate 20′ from FIG. 5 in analogy to FIG. 4 comprises two hooks 24′ which are attached to a first group 22′ of bolts 21′ of hook-in jaw 19′.

[0058] FIG. 6 shows the assembly of center bar 11 with the two extension bars 13, 16 in a rectilinear embodiment. Center bar 11 and extension bars 13, 16 are there connected to each other at a further mounting angle β, β′. Further mounting angle β, β′ according to FIG. 6 is 180° , from which the rectilinear bar assembly arises.

[0059] FIGS. 7 and 8 show the respective locking positions of attachment units 18, 18′ according to FIG. 6.

[0060] In FIG. 7, locking plate 20 with hooks 24 provided thereon is attached to second group 23 of bolts 21 at hook-in jaw 19 of center bar 11. In contrast to FIG. 4, this mounting gives rise to a rectilinear assembly of center bar 11 with extension bar 13 according to further mounting angle β.

[0061] FIG. 8 shows attachment unit 18′ formed at front end 15 of center bar 11, where hooks 24′ are there as well attached to second group 23′ of bolts 21′. The front end of center bar 11 can thereby also be connected in a rectilinear manner to additional extension bar 16.

[0062] FIG. 9 shows attachment unit 18′ from FIG. 8 in an enlarged view in the locking position. Locking bolt 25′ is there positioned with its front end 26′ below lower bolt 21′ of second group 23′ of bolts 21′ in order to secure hook 24′, which is at this point hooked in above bolt 21′, to hook-in jaw 19′. Front end 26′ of locking bolt 25′ is preferably configured to be conical and, in particular, tapered in a region directly below bolt 21′, so that locking bolt 25′ does not twist when abutting bolt 21′ when being in the locking position.

[0063] FIG. 9 also shows that locking bolt 25′ is by a spring 27′ pressed into the locking position.

[0064] FIG. 10 shows locking bolt 25′ from FIG. 9 in a release position. In the release position, front end 26′ of locking bolt 25′ is below bolt 21′ moved away laterally in order to release the lock of hook 24′ at bolt 21′. In the release position, extension bar 16 can be unhooked from center bar 11. FIG. 10 also shows that locking bolt 25′ is secured retracted in the release position in a release seat 28′. For this purpose, locking bolt 25′ can by rotation about its mounting axis be moved to release seat 28′, whereupon locking bolt 25′ remains secured due to the spring force of spring 27′.

[0065] FIG. 11 shows a sectional view of the locking position of locking bolt 25′ shown in FIG. 10. Locking bolt 25′ is in FIG. 11 with its head 29′ and with its front end 26′ held in a guide 30′. Spring 27′ presses front end 26′ of locking bolt 25′ with the tapered tip against bolt 21′. FIG. 11 also shows that locking bolt 21′ of hook-in jaw 19′ extends between a first side wall 31′ and a second side wall 32′. First and second side walls 31′, 32′ together form a stable seat and guide for locking plate 20′ so that the latter cannot swing out in the horizontal plane. It is thereby achieved that extension bar 16 fastened to center bar 11 remains positioned—when viewed in the horizontal plane—in a stable manner at the side of the road paver in the direction of travel F.

[0066] FIG. 12 shows locking bolt 25′ from FIG. 11 in the release position, where head 29′ of locking bolt 25′ is in comparison to the locking position rotated by 90° about the mounting axis seated on release seat 28′ of guide 30′.

[0067] Although the support device has above been described exclusively on a road paver, it can also be attached to other vehicles, for example, to a charger vehicle for a road paver