Ground milling machine having a replaceable milling part and method for replacing a milling part of a ground milling machine

Patent metadata

Field	Value
Publication number	US-9951483-B2
Application number	US-201514818691-A
Country	US
Kind code	B2
Filing date	Aug 5, 2015
Priority date	Aug 8, 2014
Publication date	Apr 24, 2018
Grant date	Apr 24, 2018

Abstract

The present invention relates to a ground milling machine, in particular, a road cold milling machine, having a replaceable milling drum unit. To make this replacement procedure easier, the present invention proposes a fastening device between the milling part and the machine part of the ground milling machine. The present invention furthermore relates to a method for replacing a milling part on the ground milling machine, a fastening device being used for this purpose.

First claim

What is claimed is:

1. A ground milling machine, comprising
a machine part having a machine frame, an operator platform, a drive engine, and transportation devices driven by the drive engine;
a milling part having a milling drum for milling ground material and a milling drum box for covering the milling drum to the sides and to the top; and
a fastening device configured to detachably fasten the milling drum box on the ground milling machine,
wherein the fastening device comprises at least one movable locking element and at least one counter element,
wherein the fastening device is partially arranged on the machine part and partially arranged on the milling drum box,
wherein the locking element is mounted so as to be movable between a blocking position and a release position, the locking element in the blocking position blocking the counter element in a release direction to fasten the milling drum box on the ground milling machine,
wherein the fastening device comprises a drive device, which drives a displacement of the locking element between the blocking position and the release position, in particular at least toward the release position, and
wherein a formfitting device is provided for positioning the milling drum box on the machine part in a horizontal direction.

2. The ground milling machine according to claim 1 ,
wherein the drive device drives the locking element hydraulically, pneumatically, electromechanically, or electrically.

3. The ground milling machine according to claim 1 ,
wherein the drive device is mounted on the machine part and is supplied from the ground milling machine with drive energy to displace the locking element at least from the blocking position into the release position.

4. The ground milling machine according to claim 1 ,
wherein the locking element is implemented as acting automatically toward the blocking position with spring loading.

5. The ground milling machine according to claim 1 ,
wherein a sensor unit is provided which is implemented to detect the blocking position and/or the release position of the locking element.

6. The ground milling machine according to claim 1 ,
wherein the fastening device comprises a blocking lever which is pivotable about a horizontal axis and has a blocking projection which at least partially engages behind the counter element in the blocking position.

7. The ground milling machine according to claim 1 ,
wherein the fastening device has a locking slide which is displaceable in the horizontal direction, and that the counter element comprises a locking slide receptacle, in which the locking slide at least partially engages in the blocking position.

8. The ground milling machine according to claim 1 ,
wherein the fastening device comprises a clamping device, which is implemented in such a manner that, when the locking element is located in the blocking position, the locking element clamps the milling drum box via the counter element in the vertical direction toward the ground milling machine.

9. The ground milling machine according to claim 8 ,
wherein the clamping device comprises a sliding bevel extending diagonally in relation to a horizontal plane, which acts against the counter element when the locking element is located in the blocking position.

10. The ground milling machine according to claim 9 ,
wherein a sliding surface of the sliding bevel extends at an angle of less than 30° in relation to the horizontal plane.

11. The ground milling machine according to claim 8 ,
wherein the clamping device comprises a clamping cylinder which is arranged in such a manner that, in the pressure-loaded state, the clamping cylinder presses the milling drum box against the machine part.

12. The ground milling machine according to claim 11 ,
wherein the clamping cylinder is a hollow cylinder with a central recess, said central recess being provided for threading in the counter element.

13. The ground milling machine according to claim 11 ,
wherein the clamping cylinder presses in the vertical direction from below against a locking slide.

14. The ground milling machine according to claim 11 ,
wherein a monitoring device is provided which monitors the clamping path of the clamping cylinder.

15. The ground milling machine according to claim 1 ,
wherein the formfitting device comprises a pin protruding in the vertical direction on the milling drum box, and a pin receptacle on the machine part, wherein the pin is insertable in a formfitting manner into the pin receptacle.

16. The ground milling machine according to claim 1 ,
wherein the formfitting device is implemented separately from the fastening device and functionally independent thereof.

17. The ground milling machine according to claim 1 ,
wherein the formfitting device is part of the fastening device.

18. The ground milling machine according to claim 1 ,
wherein a centering device is provided which is implemented to align the machine part in relation to the milling drum box to ensure reliable positioning of the locking element in relation to the counter element.

19. The ground milling machine according to claim 18 ,
wherein the centering device comprises at least one conical projection protruding in the vertical direction and one conical receptacle.

20. The ground milling machine according to claim 18 ,
wherein the centering device on the machine part and on the milling drum box in each case has tooth structures implemented as complementary to one another which are implemented for formfitting interlocking.

21. A method for removing and mounting a milling part of a ground milling machine from or on a machine part of a ground milling machine according to claim 1 , comprising the steps of:
a) displacing the locking element of the fastening device, via which the milling part is held on the machine part of the ground milling machine, from a blocking position into a release position;
b) removing the milling part from the machine part;
c) positioning the milling part on the ground milling machine in such a manner that the counter element and the locking element of the fastening device are aligned in relation to one another such that the locking element is displaceable back into the blocking position to block the counter element; and
d) displacing the locking element from the release position into the blocking position to fasten the milling part on the machine part of the ground milling machine, the displacement of the locking element being driven by a drive device comprising one of a hydraulic, mechanical, electromechanical, or pneumatic drive device.

Assignees

• Bomag Gmbh

Inventors

• Roetsch Helmut
• Philippsen Maximilian
• Wachsmann Steffen
• Rheinbay Frank

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