JP2866284B2 - Equipment to dig deep trenches using the milling drum - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a milling / drum mounted on a chassis.
The present invention relates to a device for digging a deep trench in the ground using s).

[0002]

BACKGROUND OF THE INVENTION Such devices are known in which a milling drum driven in the opposite direction is mounted on a chassis and the chassis itself is suspended from the mast of a lifting machine by means of a cable. In general, the length of the cable separating the mast from the chassis makes the chassis easier to run, even if the lifting machine mast is not fully oriented in the right direction, in the groove in which the chassis will be made. Enough to orient.

[0003] In contrast, if only space limited in height is available above the groove, the length of the cable separating the mast from the chassis is:
Disables rotation of the chassis about the axis of the chassis. Therefore, it is necessary to move the lifting machine to accurately position the mast with respect to the groove to be made.

[0004]

SUMMARY OF THE INVENTION The present invention provides a simple and economical method of making a trench in the ground, which can easily orient itself in a direction corresponding to the direction of the groove that the chassis wants to make. It is intended to provide a dynamic device. The device according to the invention also has the great advantage that grooves can be made along the angle line without substantially changing the position of the lifting machine, for example to make walls around the courtyard of the building. .

[0005] The subject of the present invention is an apparatus for making a trench in the ground, of the type comprising a chassis with a milling drum at the bottom, such that the chassis can be pivoted about its vertical axis. Are supported on the upper part. With the present invention, it is possible to pivot the chassis about its vertical axis without adding torsion to the cable supporting the chassis, which means that the lines of the grooves may include slopes. Nevertheless, it is understood that the chassis can be easily positioned in the direction of the groove desired to be made.

In a preferred embodiment of the present invention, a flexible pipe for raising debris to the ground is disposed on the vertical axis of rotation of the chassis, and the end of the flexible pipe has a twist that damages it. It is preferably pivotable with respect to the chassis so as not to be affected. Other flexible pipelines are needed to supply hydraulic energy to the device, especially for the motor that drives the milling drum and the pump that discharges debris.

In a preferred embodiment of the invention, each of these flexible pipelines has an upper branch pointing upwards, pivoting about its vertical axis, and being substantially horizontal. The other end of the flexible pipe, preferably connected vertically, is connected to the non-rotating upper part of the chassis by an elbow whose lower branch is connected to the end of a length of flexible pipeline. Connected to a pivoting portion of the chassis, wherein the flexible pipe is rotatable about its axis at at least one point along its length. It is horizontally eccentric with respect to the vertical branch of the elbow.

According to this embodiment of the present invention, as the chassis rotates, the rotation of each elbow about a vertical axis is
It is possible to place a sufficient number of flexible pipelines in a small volume near the axis of the chassis, as it is possible to keep the various pipeline bundles substantially parallel to each other. . In other words, during this rotation, according to this preferred embodiment of the invention, the horizontal part of the elbow to which the length of flexible pipeline is connected remains substantially in the same direction, This leaves the flexible pipes substantially parallel to each other.

Thus, it is possible to rotate the chassis by a full angle, at least 180 degrees, which allows the chassis to be oriented in all directions, taking into account the right and left balance of the milling drum. For the purpose of easily understanding the invention, one embodiment is given by way of example and not to limit the scope of the invention, and is illustrated in the accompanying drawings.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The device of FIG.
1 includes a chassis 1 that supports two rotationally drivable milling drums 2. Chassis 1 has multiple twisted cables 3
And a pulley block constituted by the pulley 4, and is suspended from a mast of a lifting machine (not shown). According to the invention, the chassis 1 is turned about a vertical axis 5 by means of ball bearings 6 housed between the upper part 7 of the chassis and the base plate 8 of the pulley block, as can be seen in the cross section of FIG. Can move. Thus, all components arranged below the horizontal plane containing the ball bearing 6 constitute the pivoting part of the chassis, whereas all components arranged above this plane are: Construct a non-rotating part of the chassis.

In the embodiment shown, a debris-removing flexible pipe 9 extends between the two pulleys 4 of the pulley block along the vertical axis 5 of the chassis 1 and terminates in the chassis 1. The flexible pipe 9 is connected to the chassis 1 by using a rotating joint (not shown) which does not receive any twist during rotation of the chassis.

In the illustrated embodiment, a plurality of flexible pipelines 10 used to supply hydraulic energy to the apparatus are connected to a non-rotating portion of the chassis 1 by two pulleys of a pulley block. It is falling between four. Each of these pipelines terminates in an upper branch of an elbow 11 mounted on a non-rotating portion of the chassis 1 so that it can rotate about the axis of its vertically arranged upper branch. . The other horizontal branch of the elbow 11 is connected to the upper end of a length of flexible pipeline 12, the lower end of which is vertically connected to the pivoting part of the chassis. Each flexible pipeline 12 enters the pivoting portion of the chassis 1 at 13. In the embodiment shown, the flexible pipeline 12 is connected to the horizontal branch of the elbow 11 so as to be able to rotate about its vertical axis, so that during rotation of the chassis 1 Not subject to any twist.

FIG. 1 illustrates how these flexible pipelines 12 are mounted on the non-rotatable upper portion of the chassis at a point 13 where the pipelines 12 enter It is shown whether the elbow 11 connected to the line 10 is displaced in the axial direction. FIGS. 2 and 3 schematically show the relative positions of two fixed length flexible pipelines 12 before and after a rotation of the lower part of the chassis 1 of about 45 degrees. Two elbows 1 connected to the upper end of the flexible pipeline 12
The upwardly directed vertical branch of each of the ones is indicated by a circle in FIG.

According to the present invention, each elbow 11 pivots about a vertical axis of its upper branch. The lower end of each fixed length pipeline 12 terminates vertically at 14 on a pivoting portion of the chassis 1, forming an arc, as seen in FIG. The flexible pipeline 12 shown in solid lines is used to schematically show the position of the chassis 1 shown in solid lines in FIG. 2, and the flexible pipeline 12 'shown in dashed lines , Is used to schematically show the flexible pipeline 12 at the location of the chassis 1 shown in broken lines in FIG.

As can be clearly seen in FIG. 2, the chassis 1
When pivots in the direction of arrow 15, flexible pipelines 12 pivot about the vertical branch of elbow 11 while remaining substantially parallel to each other. As is evident in FIG. 3, this takes into account the fact that the rotation of the chassis 1 about the vertical axis 5 reduces the horizontal distance between the lower and upper ends of the flexible pipeline 12. The curvature of the same length varies, in this case the flexible pipeline 12 'shown in broken lines.
Has a smaller curvature than the flexible pipeline 12 shown by the solid line.

In fact, FIG. 3 shows a flexible pipeline 1
2 'indicates that the bend is greater after pivoting than before pivoting, which is due to the lower end 14 of the flexible pipeline 12.
This is due to approaching the elbow 11 in the horizontal direction while the chassis 1 is rotating. Since the elbow 11 is fixed to the non-rotating portion of the chassis 1 and the lower end 14 is fixed to the rotating portion of the chassis 1, the horizontal distance changes.

It is now known that the point which is rotationally driven about an axis is equidistant from this axis, but the distance from a fixed point remote from said axis varies. In the present embodiment, the elbow 11 is mounted so as to be rotatable about the vertical branch pipe thereof, so that the flexible pipeline 12 having the non-rotating top connected to the turning bottom of the chassis 1 is substantially formed. While keeping it parallel
Approximately 90 chassis 1 supporting the milling drum
It is possible to pivot about its vertical axis in one direction or the other.

In the embodiment described above, a limited number of flexible pipelines are shown in the figure for reasons of simplicity. It is apparent, however, that it is possible to arrange multiple groups of flexible pipelines on either side of the axis of the chassis while retaining the advantages described above. It is clear that the embodiments described herein are not of a limiting nature and that any desired changes can be accepted without departing from the scope of the invention.

[Brief description of the drawings]

FIG. 1 is a front view of an apparatus according to one embodiment of the present invention.

FIG. 2 schematically shows, from above, the chassis of FIG. 1 pivoting about a vertical axis.

FIG. 3 is a view in the direction of arrows III and III ′ of FIG. 2;

[Explanation of symbols]

 Reference Signs List 1 chassis 5 vertical axis 9, 10 flexible pipe 11 elbow 12 flexible pipe 16 points

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E02F 5/02 E02F 5/08

Claims (2)

(57) [Claims] 1. An apparatus for making underground grooves, of the type comprising a chassis with a milling drum at the bottom, such that the chassis (1) is pivotable about its vertical axis (5). A flexible pipe (9) supported on its upper part (7) and rising the debris to the surface is arranged on the vertical axis (5) of rotation of the chassis (1). An apparatus for digging a deep groove in the ground using a milling drum mounted on a chassis, wherein an end of a flexible pipe (9) is rotatable with respect to the chassis (1). 2. A flexible pipeline (10) for supplying hydraulic energy to the chassis (1) comprises an elbow (11).
The elbow (11) is pivoted about the vertical axis of the elbow (11), and is substantially horizontal, with the upper branch pointing upward and connected to the non-rotating upper portion of the chassis (1). Is connected to an end of the flexible pipeline (12), and the other end of the flexible pipeline (12) is connected to a rotating part of the chassis (1). The flexible pipeline (12) is rotatable about its axis at at least one point (16) along its entire length, and the lower end (14) of the flexible pipeline (12) is connected to the elbow (11). 2.) The device according to claim 1, wherein the device is horizontally eccentric with respect to the vertical branch of (i).