Automotive milling machine, as well as method for steering an automotive milling machine

Patent metadata

Field	Value
Publication number	US-9873993-B2
Application number	US-201614987811-A
Country	US
Kind code	B2
Filing date	Jan 5, 2016
Priority date	Aug 23, 2012
Publication date	Jan 23, 2018
Grant date	Jan 23, 2018

Abstract

In an automotive milling machine, with a machine frame with longitudinal axis, with a chassis with wheels or tracked travelling drive units which support the machine frame, with a controller for the travelling, steering and milling operation, with a height-adjustable working drum, with a slewable last or single transport conveyor of specified length arranged in front of or behind the working drum as seen in the direction of travel of the milling machine, where the transport conveyor is, as a minimum, slewable sideways about an essentially vertical first axis under a slewing angle, it is provided for the following features to be achieved: the controller comprises a detection and control system which, as a minimum, detects the steering angle of the steering controller for the chassis or, as a minimum, the steering angle of the steering controller and the distance travelled or the travel speed, and controls the slewing angle of the transport conveyor in accordance with this no less than one parameter.

First claim

What is claimed is:

1. An automotive milling machine, comprising:
a machine frame with a longitudinal axis;
a plurality of ground engaging units configured to support the machine frame from a ground surface, at least one of the ground engaging units being steerable in a steering angle;
working drum connected to the machine frame;
a transport conveyor slewable sideways in a slewing angle relative to the machine frame about an essentially vertical first axis;
at least one detector configured to detect at least one parameter, the at least one parameter including the steering angle; and
a controller connected to the at least one detector to receive the at least one parameter, and configured to continuously control the slewing angle of the transport conveyor via associated piston-cylinder units and in accordance with the at least one parameter;
wherein the controller is configured to continuously control the slewing angle of the transport conveyor such that the slewable transport conveyor assumes a slewing angle in each steering angle during forward travel which essentially corresponds to a slewing angle of a longitudinal axis of a slewable fictitious single-axle trailer articulated at the first axis when in forward travel.

2. The automotive milling machine of claim 1 , wherein:
the controller is configured such that a location of the axle of the fictitious single-axle trailer is selectable in longitudinal direction.

3. The automotive milling machine of claim 2 , wherein:
the controller is configured such that a longitudinal distance of the axle from the first axis is in a range of from one-third to an entire length of the transport conveyor.

4. The automotive milling machine of claim 3 , wherein the longitudinal distance of the axle from the first axis is in a range from 40% to 60% of the entire length of the transport conveyor.

5. The automotive milling machine of claim 2 , wherein:
the controller is configured such that a longitudinal distance of the axle from the first axis is in a range of from one-third to an entire distance from the first axis to a point of impingement of milled material from the transport conveyor onto a loading surface of an associated transport vehicle.

6. The automotive milling machine of claim 5 , wherein the longitudinal distance of the axle from the first axis is in a range from 40% to 60% of the entire distance from the first axis to the point of impingement.

7. An automotive milling machine, comprising:
a machine frame with a longitudinal axis, the machine frame having a front end and a rear end with reference to a forward direction of travel;
two front and two rear tracked ground engaging units configured to support the machine frame from a ground surface, the front and the rear tracked ground engaging units being steerable in steering angles;
a working drum connected to the machine frame and located in a longitudinal direction between the front and rear tracked ground engaging units;
a plurality of lifting columns for adjusting a height of the machine frame and the working drum relative to the ground surface, the machine frame being supported from each of the front and rear tracked ground engaging units by one of the lifting columns;
a transport conveyor extending forward from the front end of the machine frame and slewable sideways in a slewing angle relative to the machine frame about an essentially vertical first axis;
at least one detector configured to detect at least one parameter, the at least one parameter including at least one of the steering angles of the tracked ground engaging units; and
a controller connected to the at least one detector to receive the at least one parameter, and configured to continuously control the slewing angle of the transport conveyor via associated piston-cylinder units and in accordance with the at least one parameter,
wherein the controller is configured to automatically control the slewing angle of the transport conveyor such that during forward travel an end of the transport conveyor is essentially guided along a center line, or at a constant spacing from the center line, of a track to be travelled over by the milling machine.

8. The automotive milling machine of claim 7 , wherein:
the controller is configured such that during forward travel the transport conveyor is guided along a path to be travelled over by the milling machine.

9. The automotive milling machine of claim 7 , wherein the at least one parameter further includes a distance travelled by the milling machine.

10. The automotive milling machine of claim 7 , wherein the at least one parameter further includes a travel speed of the milling machine.

11. The automotive milling machine of claim 7 , wherein:
the controller is configured to automatically control the slewing angle of the transport conveyor such that during forward travel an end of the transport conveyor is guided to remain in a track to be travelled over by the milling machine.

12. The automotive milling machine of claim 7 , wherein:
the transport conveyor is slewable in an elevation angle about a second axis orthogonal to the first axis;
the transport conveyor is configured to discharge milled material at a conveying speed onto a point of impingement on a loading surface of a transport vehicle travelling ahead of the milling machine; and
the controller configured to determine a position of the loading surface relative to the transport conveyor and to control at least the slewing angle so as to maintain the point of impingement on the loading surface.

13. The automotive milling machine of claim 12 , wherein:
the controller is further configured to control the elevation angle so as to maintain the point of impingement on the loading surface.

14. The automotive milling machine of claim 12 , wherein:
the controller is further configured to control the conveying speed so as to maintain the point of impingement on the loading surface.

15. The automotive milling machine of claim 12 , wherein the controller is configured to maintain the point of impingement along a longitudinal median plane of the loading surface.

16. The automotive milling machine of claim 12 , wherein the controller is configured to maintain the point of impingement in a track of the milling machine.

17. The automotive milling machine of claim 12 , wherein the at least one detector is selected from the group consisting of:
a steering detector configured to detect the steering angle of at least one of the tracked ground engaging units;
a slewing detector configured to detect the slewing angle of the transport conveyor;
an elevation detector configured to detect the elevation angle of the transport conveyor; and
a conveying speed detector configured to detect the conveying speed of the transport conveyor.

18. The automotive milling machine of claim 7 , wherein the at least one detector further comprises:
a distance detector configured to detect a distance travelled by the milling machine.

19. The automotive milling machine of claim 7 , wherein the at least one detector further comprises:
a speed detector configured to detect a travel speed of the milling machine.

20. The milling machine of claim 7 , wherein the at least one detector comprises:
a distance measuring detector configured to detect a distance from the discharge conveyor to a transport vehicle; and
wherein the controller is configured to generate start and stop signals for the transport vehicle discernible by a vehicle driver of the transport vehicle.

Assignees

• Wirtgen Gmbh

Inventors

• Berning Christian
• Vogt Andreas
• Barimani Cyrus

Classifications

• B65G41/002

  Pivotably mounted · CPC title

• E21C27/24

  by milling means acting on the full working face {, i.e. the rotary axis of the tool carrier being substantially parallel to the working face (similar machines for tunneling E21D9/1026)} · CPC title

• 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