Automotive milling machine, as well as method for unloading milled material

Patent metadata

Field	Value
Publication number	US-9915043-B2
Application number	US-201615000161-A
Country	US
Kind code	B2
Filing date	Jan 19, 2016
Priority date	Aug 23, 2012
Publication date	Mar 13, 2018
Grant date	Mar 13, 2018

Abstract

In an automotive milling machine, with a height-adjustable machine frame, with a controller for the travelling and milling operation, with a working drum, with a slewable transport conveyor device arranged in front of or behind the working drum as seen in the direction of travel of the milling machine, where the last or single transport conveyor of the transport conveyor device as seen in the direction of transport is slewable sideways, relative to the machine frame, about an essentially vertical axis under a slewing angle, and about an axis orthogonal to the axis under an elevation angle, and where the transport conveyor discharges the milled material at a specified conveying speed onto a point of impingement on a loading surface of a transport vehicle, it is provided for the following features to be achieved: the controller comprises a detection and control system which continuously locates the alterable position of the loading surface of the transport vehicle and of the transport conveyor relative to the machine frame, or the alterable position of the loading surface of the transport vehicle relative to the transport conveyor, and continuously controls positioning of the point of impingement of the milled material automatically via the slewing angle and/or the elevation angle and/or the conveying speed of the transport conveyor in such a way that the discharged milled material impinges within the loading surface.

First claim

The invention claimed is:

1. An automotive milling machine, comprising:
a machine frame;
a working drum connected to the machine frame and configured to mill material from a ground surface;
a transport conveyor arranged in front of or behind the working drum, the transport conveyor being pivotable relative to the machine frame about an essentially horizontal first axis to define an elevation angle, and the transport conveyor being slewable sideways relative to the machine frame about a second axis orthogonal to the first axis to define a slewing angle, the transport conveyor having a conveying speed, wherein the transport conveyor discharges milled material onto a point of impingement on a loading surface of a transport vehicle;
at least one detector configured to supply data corresponding to an alterable position of the loading surface of the transport vehicle relative to the transport conveyor; and
a controller connected to receive the data from the at least one detector and configured to:
compare the received data with specified target position data; and
in the event of any deviations from the specified target position data, continuously control positioning of the point of impingement of the milled material automatically via at least the conveying speed of the transport conveyor such that the discharged milled material impinges on a specified point of impingement on the loading surface, independent of movements of the milling machine and the transport vehicle.

2. The automotive milling machine of claim 1 , wherein the detector comprises at least one of:
a loading surface detector configured to continuously detect the position of the loading surface;
a conveyor detector configured to continuously detect the position of the transport conveyor;
a slewing angle detector;
an elevation angle detector; and
a conveying speed detector.

3. The automotive milling machine of claim 1 , wherein:
the detector includes an image-recording system or a radio-frequency identification system configured to continuously locate the position of at least one of the loading surface and the transport conveyor and to supply data for determining the position of the loading surface in relation to the transport conveyor.

4. The automotive milling machine of claim 3 , wherein:
the controller is configured to
in the event of any deviations from the specified target position data, to perform a continuous position control for at least one of:
a discharge end of the transport conveyor;
the point of impingement; and
the conveying speed.

5. The automotive milling machine of claim 4 , wherein:
the controller is configured to emit a signal prior to or at latest in the event of any deviation not rectifiable by control of the position of the loading surface relative to the position of the transport conveyor, as seen in the direction of transport and relative to the machine frame.

6. The automotive milling machine of claim 3 , wherein:
the image-recording system or a detector for the radio-frequency identification system is arranged at a discharge end of the transport conveyor.

7. The automotive milling machine of claim 1 , wherein:
the detector comprises an image-recording system, and the controller is configured to
detect and analyze a filling condition of the loading surface; and
uniformly load the loading surface by continuously controlling at least one of:
the conveyor speed;
a position of a discharge end of the transport conveyor; and
the point of impingement.

8. The automotive milling machine of claim 1 , wherein:
the controller is configured such that control data for at least one of the slewing angle, the elevation angle and the conveying speed are stored in a map in accordance with at least one of:
loading surfaces of different transport vehicles;
different loading conditions of the loading surface for different positions; and
points of impingement on the loading surface.

9. The automotive milling machine of claim 1 , wherein:
the detector is configured to detect a marking on the transport vehicle marking at least one point of an essentially rectangular loading surface or an essentially cuboid-shaped loading volume of the transport vehicle.

10. A method of discharging removed milled material from an automotive milling machine onto a point of impingement on a loading surface of a transport vehicle, the method comprising:
(a) removing the milled material from a ground surface with a working drum of the milling machine;
(b) discharging the milled material at a conveying speed from a transport conveyor arranged in front of or behind the working drum relative to a direction of travel of the milling machine, the transport conveyor being slewable sideways in a slewing angle and adjustable in discharge height in an elevation angle;
(c) detecting with a detection and control system an alterable position of the loading surface of the transport vehicle relative to the transport conveyor; and
(d) automatically controlling with the detection and control system the point of impingement of the milled material by controlling at least the conveying speed such that the milled material is discharged onto a specified point of impingement within the loading surface, independent of movements of the milling machine and the transport vehicle.

11. The method of claim 10 , wherein:
the detecting of step (c) is performed by an image-recording system or a radio-frequency identification system, to supply data for determining the position of the loading surface in relation to the transport conveyor.

12. The method of claim 11 , wherein step (d) further comprises:
comparing the data for determining the position with stored target position data to identify any deviation; and
in the event a deviation is determined, controlling at least one of the position of a discharge end of the transport conveyor, the conveying speed, and the position of the transport vehicle to correct the deviation.

13. The method of claim 12 , wherein the target position data are determined by a teach-in procedure.

14. The method of claim 10 , further comprising:
detecting a filling condition of the loading surface via an image-recording system; and
wherein step (d) further comprises loading the loading surface uniformly.

15. The method of claim 10 , wherein:
step (d) further comprises maintaining the point of impingement at a position specified by the detection and control system independent of movements of the milling machine and the transport vehicle.

16. The method of claim 10 , further comprising:
determining a position of a geometrical center of the loading surface via image analysis or via a non-optical positioning system;
determining a position of a current point of impingement on the loading surface by image analysis; and
wherein in step (d) the position of the point of impingement is regulated in accordance with a desired position of the point of impingement.

Assignees

• Wirtgen Gmbh

Inventors

• Berning Christian
• Franzmann Dirk
• Montermann Armin
• Barimani Cyrus

Classifications

• E01C23/088 Primary

  Rotary tools, e.g. milling drums {(for forming recesses to receive marking materials E01C23/0946)} · CPC title

• E01C23/127

  rotary, e.g. rotary hammers · CPC title

• G05D2201/0202

  Physics · mapped topic

• G05D1/0293

  Convoy travelling · CPC title

• G05D1/0246

  using a video camera in combination with image processing means · CPC title