JPH06200539A - Digging device for deep ditch in ground by using milling drum installed onto chassis - Google Patents

Abstract

PURPOSE: To excavate a trench in an arbitrary direction by pivoting a chassis and a milling drum so that only the chassis and milling drum are directed in excavating direction. CONSTITUTION: A chassis 1 and a milling drum 2 below it are pivoted around a vertical axial line 5. At the same time, flexible pipes 9 and 12 are pivoted along with the chassis. Here, an elbow 11 keeps the flexible pipes 12 parallel to each other. The milling drum 2 is oriented to the direction of trench which is to be excavated. Here, the position of a machine main body hanging the chassis 1 and milling drum 2 is not changed. The trench whose longitudinal direction is specified is excavated with the milling drum 2. Thus, changing of the orientation of the milling drum 2 is easily, and the trench is excavated in an arbitrary direction.

Description

Detailed Description of the Invention

FIELD OF THE INVENTION The present invention relates to milling drums mounted on a chassis.
The present invention relates to a device for digging a deep trench in the ground.

2. Description of the Prior Art Such devices are already known in which milling drums driven in opposite directions are mounted on a chassis, which itself is suspended from the mast of a lifting machine by means of cables. In general, the length of the cable that separates the mast from the chassis is parallel to the groove in which you intend to make the chassis, even if the lifting machine's mast is not perfectly oriented in the correct direction, making the chassis easier. Enough to direct to. In contrast, above the groove, if only space limited in height is available,
The length of the cable separating the mast from the chassis makes it impossible to rotate the chassis around the chassis axis. Therefore, it is necessary to move the lifting machine in order to accurately position the mast with respect to the groove to be made.

SUMMARY OF THE INVENTION The present invention is a simple and economical way to make a groove in the ground that allows itself to be easily oriented in a direction corresponding to the direction of the groove the chassis desires to make. The purpose is to provide a conventional device. The device according to the invention also has the great advantage that grooves can be made along the angle lines without substantially changing the position of the lifting machine, for example to make walls around the courtyard of a building. . The subject of the invention is a device for grooving in the ground, of the type including a chassis with a milling drum at the bottom, such that the chassis can be rotated about its vertical axis. It is characterized by being supported at the top. The present invention allows the chassis to be pivoted about its vertical axis without adding twist to the cables supporting the chassis, which means that the groove lines may include bevels. Nevertheless, it is understood that it allows the chassis to be easily positioned in the direction of the groove one wishes to make. In a preferred embodiment of the invention, the flexible pipe for raising the debris to the ground is arranged on the pivoting vertical axis of the chassis, the end of said flexible pipe being free from twisting which damages it. In addition, it is preferably pivotable with respect to the chassis. Other flexible pipelines are needed to supply the system with hydraulic energy, especially for the motors that drive the milling drums as well as the pumps that discharge debris. In a preferred embodiment of the invention,
Each of these flexible pipelines has an upper branch pointing upwards and pivots about its vertical axis and a substantially horizontal lower branch having a fixed length. The other end of the flexible pipe, which is connected to the non-rotating upper portion of the chassis by an elbow connected to the end of the flexible pipeline, is preferably vertically connected to the swivel portion of the chassis, The length is pivotable about its axis at at least one point on its length, the lower end of a length of flexible pipeline is horizontally eccentric to the vertical branch of the elbow. . This embodiment of the invention allows the swiveling of each elbow about a vertical axis to remain substantially parallel to one another while forming a bundle of various pipelines as the chassis rotates. It is possible to place a sufficient number of flexible pipelines in a small volume near the axis of the chassis. In other words, during this rotation, according to this preferred embodiment of the present invention, the horizontal portion of the elbow to which the length of flexible pipeline is connected remains substantially oriented in the same direction, This is
The flexible pipes remain substantially parallel to each other. It is therefore possible to rotate the chassis at all angles, at least 180 degrees, which allows the chassis to be oriented in all directions, taking into account the left and right balance of the milling drum. For the purpose of facilitating the understanding of the invention, there will be described one embodiment given by way of example and not limiting the scope of the invention and shown in the accompanying drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The device of FIG.
It includes a chassis 1 that supports two rotationally drivable milling drums 2. Chassis 1 is a multi-strand cable 3
And a pulley block constituted by a pulley 4 are used to suspend the mast of the lifting machine (not shown). According to the invention, the chassis 1 rotates about a vertical axis 5 by means of a ball bearing 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 the components located below the horizontal plane containing the ball bearings 6 constitute the pivoting part of the chassis, whereas on the contrary all the components located above this plane are It constitutes the non-rotating part of the chassis. In the embodiment shown, the debris-removing flexible pipe 9 comprises two pulleys 4 of the pulley block.
Between the two ends in the chassis 1 along the vertical axis 5 of the chassis 1. This pipe 9 is connected to the chassis by the use of a rotary joint, not shown, which does not undergo any twisting during rotation of the chassis.
In the illustrated embodiment, a plurality of flexible pipelines 10, which are used to supply hydraulic energy to the system, connect between the two pulleys 4 of the pulley block to connect to the non-rotating portion of the chassis. It is descending. Each of these pipelines is an elbow-shaped union 11 attached to a non-rotating part of the chassis so that it can pivot about the axis of its vertically arranged upper branch pipe.
Ends in the upper branch of. The other branch of the horizontal elbow 11 is connected to the upper end of a flexible pipe 12 of a certain length, and its lower end is connected vertically to the rotating part of the chassis. Each length 12 penetrates into the pivoting portion of the chassis at 13. In the illustrated embodiment, the length of each of the flexible pipelines 12 is connected to a horizontal tributary of the elbow 11 so that it can pivot about its longitudinal axis, so that it is of the chassis. It does not undergo any twist during rotation. FIG. 1 shows how a fixed length pipeline 12 penetrates the pivoting portion of the chassis 1 and how these fixed length flexible pipelines 12 are not connected to the chassis. It is shown axially separated from the elbow 11 which is connected to the pipeline 10 ending at the upper part of rotation. 2 and 3 show
About 45 degrees, 2 before and after the rotation of the lower part of the chassis 1
1 schematically shows the relative position of a length of flexible pipeline 12 of a book. The upwardly facing vertical branch of each of the two elbows 11 connected to the upper end of the length 12 is indicated by a circle in FIG. According to the invention,
Each elbow 11 rotates about the vertical axis of its upper branch pipe. The lower end of each fixed length pipeline 12 terminates vertically at 14 on the pivoting portion of the chassis, forming an arc, as seen in FIG. 3, in this case a solid line. 12 is used to schematically illustrate a length of pipeline in the position of the chassis shown in solid lines in FIG. 2 and dashed line 12 '.
Is used to schematically illustrate this length of pipeline in the position of the chassis shown in phantom in FIG. As can be clearly seen in FIG. 2, when the chassis 1 pivots in the direction of the arrow 15, the flexible pipelines 12 of constant length remain substantially parallel to each other and center on the vertical branch of the elbow 11. Turn to. Considering the fact that pivoting the chassis about the vertical axis 5 reduces the horizontal distance between the lower and upper ends of a length of flexible pipeline, as is clear from FIG. , The curvature of these lengths varies, in which case line 12 'has a more pronounced curvature than line 12. actually,
FIG. 3 shows that the curve of the pipeline 12 'of constant length is greater after rotation than the rotation, which means that the union 14 of the pipeline 12 of constant length causes the rotation of the chassis. This is because the elbow 11 was approached in the middle and the horizontal direction. Since the elbow 11 is fixed to the non-rotating portion of the chassis and the union 14 is fixed to the rotating portion of the chassis, the horizontal distance changes. Now, it is known, then, that a point which is driven to rotate about an axis is equidistant from this axis but at a variable distance from a fixed point which is separate from said axis. According to this embodiment, a length of flexible pipeline connecting the non-rotating top to the pivoting bottom of the chassis is provided by the use of elbows mounted such that the elbows are pivotable about their vertical tributaries. It is possible to rotate the chassis supporting the milling drum about 90 degrees about its vertical axis in one direction or the other while keeping the axes substantially parallel. For reasons of simplicity, a limited number of flexible pipelines are shown in the figure, however, while retaining the above advantages, a large number of groups of flexible pipelines can be placed on either side of the chassis axis. Obviously, it can be arranged. The embodiment just described is not of a limiting character,
Obviously, any desired modification can be accepted without departing from the scope of the present invention.

[Brief description of drawings]

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

2 is a schematic view from above of the chassis of FIG. 1 rotating about a vertical axis;

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

[Explanation of symbols]

 1 Chassis 5 Vertical Axis 9, 10 Flexible Pipe 11 Elbow 12 Flexible Pipe 16 Points

Claims (3)

[Claims] 1. A device for making a groove in the ground, of the type comprising a chassis with a milling drum in the lower part, such that the chassis (1) can pivot about its vertical axis (5). A device characterized in that it is supported on its upper part (7). 2. A flexible pipe (9) for raising debris to the surface is arranged on the vertical axis (5) of rotation of the chassis (1), the end of said flexible pipe (9). Part
Device according to claim 1, which is rotatable with respect to the chassis (1). 3. A flexible pipeline (10) for supplying hydraulic energy to the chassis (1), each of which has its upper branch pipe directed upward and pivots with respect to the vertical axis of the elbow, A substantially horizontal lower branch is connected to the non-rotating upper part of the chassis (1) by an elbow (11) connected to the end of a length of flexible, pipeline (12). The other end of the flexible pipeline (12), preferably vertically (14), the chassis (1)
Of the flexible pipeline (12) is coupled to a pivoting portion of the flexible pipe (12) such that the length (12) is pivotable about its axis at at least one point (16) along the length. )
Device according to any one of claims 1 and 2, wherein the lower end of the length is vertically eccentric with respect to the vertical branch of the elbow (11).