Civil engineering machine

Abstract

The invention relates to a civil engineering machine with a undercarriage comprising a track chassis, a superstructure mounted on the undercarriage, so as to be rotatable about a vertical axis of rotation, a leader with a linear guide along which a work carriage with a construction work implement is displaceably mounted, and an articulation mechanism by means of which the leader is adjustably mounted on the superstructure. According to the invention it is provided that the articulation mechanism comprises a telescopic arm by means of which a distance of the leader relative to the superstructure can be adjusted.

Claims

1. A civil engineering machine, comprising an undercarriage which comprises a chassis, a superstructure with an operator's cab, the superstructure being mounted on the undercarriage, so as to be rotatable about a vertical axis of rotation, a leader with a linear guide along which a work carriage with a construction work implement is displaceably mounted, and an articulation mechanism by means of which the leader is adjustably mounted on the superstructure, wherein the articulation mechanism comprises a telescopic arm having a horizontal pivot axis on one end and a free end on the other end, the horizontal pivot axis being located above the operator's cab, and a holding device arranged at the free end of the telescopic arm so as to be pivotable around the telescopic arm and configured to hold the leader such that the leader is pivotable between a vertical position and a horizontal position, the leader being held only by the holding device, a distance of the leader relative to the superstructure is adjustable by extending or retracting telescoping of the telescopic arm when the telescopic arm is substantially horizontally oriented, without substantial changes to the vertical position of the leader, the undercarriage is configured as a track-bounded undercarriage with a chassis having wheels for driving on railroad tracks, and in a transport position for traveling on the railroad tracks, the telescopic arm is oriented substantially horizontally above the operator's cab and is extended axially and the holding device places the leader in a lying position in front of the undercarriage.

2. The civil engineering machine according to claim 1, wherein the leader is mounted on the holding device, so as to be displaceable parallel to its linear guide.

3. The civil engineering machine according to claim 2, wherein the holding device comprises a pivoting unit by means of which the leader is pivotable about a pivot axis of the leader which is oriented in parallel to the linear guide of the leader.

4. The civil engineering machine according to claim 2, wherein a detachable connecting unit is arranged on the holding device, by means of which the leader is connectible to the telescopic arm in an easily detachable manner.

5. The civil engineering machine according to claim 4, wherein the detachable connecting unit is actuatable automatically.

6. The civil engineering machine according to claim 4, wherein the holding device is mounted on the connecting unit such that the holding device is pivotable relative to the telescopic arm.

7. The civil engineering machine according to claim 1, wherein the leader is pivotable from a substantially vertical operating position into a substantially horizontal rest position, which, in the longitudinal direction, is located in front of the superstructure.

8. The civil engineering machine according to claim 7, wherein the leader is placed on a support in the rest position, a detachable connecting unit is arranged on the holding device, by means of which the leader is connectible to the telescopic arm in a detachable manner, and the leader is detachable from the telescopic arm in the placed rest position on the support by detaching the connecting unit.

9. The civil engineering machine according to claim 8, wherein the support is configured for placing the leader on a transport car.

10. The civil engineering machine according to claim 1, wherein the telescopic arm is actuatable hydraulically.

11. The civil engineering machine according to claim 1, wherein the construction work implement comprises a vibrator, a drill drive, a pile driver, a sheet pile press or a cutter on the work carriage.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The invention is further described below with reference to preferred exemplary embodiments, which are shown schematically in the drawings. The drawings show in:

(2) FIG. 1 a side view of a first civil engineering machine according to the invention;

(3) FIG. 2 a view of an enlarged detail of the civil engineering machine of FIG. 1 with pivoted superstructure;

(4) FIG. 3 a schematic top view of a civil engineering machine according to the invention;

(5) FIG. 4 a side view of the civil engineering machine according to the invention according to FIG. 1 in a transport position;

(6) FIG. 5 a side view of another civil engineering machine according to the invention with a vibrator in a transport position according to FIG. 4;

(7) FIG. 6 a side view of another civil engineering machine according to the invention with a pile driver in a transport position corresponding to FIGS. 4 and 5;

(8) FIG. 7 a side view of another civil engineering machine according to the invention with a sheet pile press in a transport position corresponding to FIGS. 4 to 6;

(9) FIG. 8 another embodiment of a civil engineering machine according to the invention in a transport state with an auxiliary car; and

(10) FIG. 9 a top view of the civil engineering machine according to FIG. 8.

DETAILED DESCRIPTION

(11) A first civil engineering machine 10 according to the invention is explained in conjunction with FIGS. 1 and 2. For travel on railroad tracks 6, the civil engineering machine 10 includes a track-bounded undercarriage 20 having a flat support frame 22 with a chassis 21, at each end of which is arranged a bogie 24 in each case having four wheel sets 25 with track wheels 26. The undercarriage 20 may have a length of about 12 to 18 meters, preferably about 15 meters. Each wheel set 25 comprises two wheels. The bogie 24 is rotatably mounted about a vertical axis on the support frame 22.

(12) A superstructure 30 with an operator's cab 32 is mounted approximately centrally on the undercarriage 20 so that it can rotate about a vertical axis of rotation 31. A telescopic arm 42, which can be adjusted in length, is mounted on the superstructure 30 so that it can pivot about a horizontal pivot axis 43 and can be pivoted about the horizontal pivot axis 43 by means of at least one actuating cylinder 38. Preferably, two actuating cylinders 38 can be provided. The telescopic arm 42 is part of an articulation mechanism 40, wherein a holding device 46 for holding a leader 50 is arranged at the free end of the telescopic arm 42 via a detachable connecting unit 45. The holding device 46 can be pivoted between the substantially vertical operating position shown in FIGS. 1 and 2 and a substantially horizontal transport position by means of a tilt cylinder 47.

(13) In addition, a pivoting unit 48 is arranged on the holding device 46, by means of which a vertical adjustment unit 49 can be pivoted with the leader 50 about a pivot axis that is vertical in FIG. 1. By means of the vertical adjustment unit 49, the leader 50 can be adjusted in the vertical direction or in the longitudinal direction of the leader 50 via the vertical support 52.

(14) The drive unit for driving the civil engineering machine 10, which is not shown in FIGS. 1 and 2, is substantially arranged in a receiving space 23 on the support frame 22 of the undercarriage 20. The drive unit serves both as a travel drive for the undercarriage 20 for automatic travel, for adjusting the superstructure 30 as well as the articulation mechanism 40, and also for operating a construction work implement 70 on the leader 50.

(15) According to FIGS. 1 and 2, a linear guide 54 is formed on a front side of the vertical support 52 of the leader 50, along which a work-carriage 60 with the construction work implement 70 is mounted so as to be vertically adjustable. In the illustrated exemplary embodiment, the construction work implement 70 is configured for drilling a hole. For this purpose, a drill drive 72 is attached to the work-carriage 60. The drill drive 72 rotationally drives a Kelly bar 71 suspended from the leader 50 via a cable. A drilling tool 73 is detachably attached to the lower end of the Kelly bar 71.

(16) To carry out a construction project along the railroad tracks 6, the construction work implement 70 is pivoted outward with the superstructure 30 about the vertical axis of rotation 31 usually by about 30 to 60, in individual cases up to a maximum of 90, as shown schematically in FIG. 2. To ensure the tilt stability of the civil engineering machine 10, lateral support systems 27 with a laterally outward-pivotable pivoting carrier 28 are arranged on the undercarriage 20. Vertically extendable supports 29 are arranged at the free end of each pivot carrier 28. This allows the vertical supports 29 to be supported on the ground or on prepared support elements 8. In addition, an optionally hydraulically extendable support foot 58 can be arranged at the lower end of the vertical support 52 of the leader 50, by means of which the leader can be supported directly on the ground.

(17) FIG. 3 schematically shows a possible working range or adjustment range of the civil engineering machine 10 according to FIGS. 1 and 2. The non-hatched area within the inner radius R1 denotes a working area in which the leader 50 is held solely by the telescopic arm 42 of the articulation mechanism 40. The hatched work area between the inner radius R1 and the outer radius R2 requires the leader 50 to be supported on the ground by the support foot 58.

(18) Depending on the respective travel position of the civil engineering machine 10 along the railroad tracks 6, the rotational position of the superstructure 30 around the vertical axis of rotation 31, the support of the leader 50 with the support foot 58 and the extended position of the telescopic arm 42, a working area with a distance corresponding to the maximum outer radius R2 can thus be reliably worked along tracks.

(19) FIG. 4 shows a first transport position of the civil engineering machine 10 according to FIGS. 1 and 2. For the transport position, the superstructure 30 is oriented longitudinally to the undercarriage 20. The telescopic arm 42 of the articulation mechanism 40 is extended axially. At the same time, the tilt cylinder 47 is extended so that the leader 50 is arranged approximately horizontally with a certain angle of inclination with respect to the horizontal. In this transport position, the leader 50 is thus essentially positioned in a lying position in front of the actual undercarriage 20. If necessary, a mast head 56 on the leader 50 can be folded in by means of a folding cylinder 57, so as to further reduce the overall height H of the track-bounded civil engineering machine 10 in the transport position, so as to provide a maximum permissible height for rail transport. Preferably, this is possible when the operation of the construction work implement 70 does not require rope guidance via the pulleys located at the mast head. In this state, shorter distances in particular can be covered in slow travel, e.g. within a construction site, so that the first transport position is also referred to as the offset position.

(20) FIG. 5 shows a further civil engineering machine 10 according to the invention in the transport position according to FIG. 4, which largely corresponds to the machine described above, but where a vibrator 74 is adjustably mounted on the leader 50 as a construction work implement 70. The vibrator 74 has, in particular, rotationally drivable unbalanced masses with which targeted vibrations can be generated, for example for driving sheet piles into a ground.

(21) FIG. 6 shows another civil engineering machine 10 according to the invention in the transport position according to FIGS. 4 and 5, wherein the construction work implement 70 comprises a pile driver 76. The pile driver 76 can be used to apply targeted impact pulses for driving beams or piles into the ground.

(22) Referring to FIG. 7, another civil engineering machine 10 according to the invention is shown in the transport position corresponding to FIGS. 4 to 6, wherein a sheet pile press 78 for pressing sheet piles into the ground is attached to the leader 50 as the construction work implement 70.

(23) FIGS. 8 and 9 show a civil engineering machine 10 according to the invention in another transport position, which is particularly suitable for covering longer distances and at higher travel speeds. For this purpose, the civil engineering machine 10 having the track-bounded undercarriage 20 comprises an auxiliary car 80, which can be detachably coupled to the undercarriage 20. In this case, the civil engineering machine 10 and the auxiliary car 80 can be incorporated into a train formation with an external drive unit such as a locomotive, for example, or can be driven only by an external drive device such as a locomotive. An upper side of the auxiliary car 80 is formed as a support 82 for the leader 50.

(24) For placing, the leader 50 is preferably brought into a substantially horizontal position by the articulation mechanism 40 on the superstructure 30 after the leader has been pivoted by 90 along an axis parallel to the longitudinal direction of the leader by the pivoting means 48, and is placed immediately or preferably after being pivoted by 90 to the side onto the support 82 of the auxiliary car 80. The 90 pivoting is preferably performed with the mast being in vertical position. The connecting unit 45 between the telescopic arm 42 and the holding device 46 of the articulation mechanism 40 can then be detached. Now the telescopic arm 42 can be retracted again. Optionally or in addition, the placed leader 50 can be shifted laterally and/or in the track direction on the auxiliary car 80 in order to bring the center of gravity of the unit of leader 50 and work carriage 60 as close as possible to the center of the auxiliary car 80. The mast head 56 can be folded to prevent it from projecting laterally beyond the width of the auxiliary car 80. Thereby line connections 66 may remain between the telescoping arm 42 on the superstructure 30 and the leader 50 placed on the auxiliary car 80. The line connections may be power lines and/or data lines. This enables the leader 50 to be reconnected to the superstructure almost automatically by extending the telescopic arm 42 and closing the connecting unit 45 when another construction site is reached, without having to re-establish the line connections 66 before starting work.

(25) The civil engineering machines 10 shown in FIGS. 1 to 9 basically have the same structure, although said structure differs significantly in the type of construction work implement 70 used.