HUMAN INTERFACE OPERATING DEVICE OF AN UNDERGROUND MINING MACHINE

1 . A human interface operating device of an underground mining machine, comprising a rotatably and axially actuatable control element for controlling functions of the underground mining machine.

2 . The human interface operating device according to claim 1 , which is configured and designed such that, in a mounted state of the operating device in which it is secured to a housing of a control cabinet, it forms a flameproof enclosure according to the IEC 60079-1 standard.

3 . The human interface operating device according to claim 1 or 2 , which is configured and designed such that, in the mounted state, it has a pressure resistance of 5 bar.

4 . The human interface operating device according to claim 1 , wherein the control element is rotationally actuatable around and axially actuatable along its longitudinal axis (L).

5 . The human interface operating device according to claim 1 , which further comprises a base body configured to be secured to a housing of a control cabinet of the underground mining machine, wherein the control element is rotatably and translationally supported in the base body.

6 . The human interface operating device according to item 5 , wherein the control element is rotatably and translationally supported in the base body by means of a plain bearing formed by a shaft of the control element and a through bore provided at the base body which are engaged to one another.

7 . The human interface operating device according to claim 6 , wherein the plain bearing forms a flameproof enclosure according to the IEC 60079-1 standard.

8 . The human interface operating device according to claim 6 , wherein the shaft and the through bore are provided with a plain fit having a nominal size range of 14 mm and a fit of H8/d9.

9 . The human interface operating device according to claim 6 , wherein the plain bearing extends along the longitudinal axis (L) of the control element over at least 15 mm.

10 . The human interface operating device according to claim 6 , wherein in the range of an inside end of the plain bearing, a sealing ring is provided between the base body and the shaft of the control element.

11 . The human interface operating device according to claim 1 , wherein the control element is connected to a sensor unit which is configured to sense a rotational and axial movement of the control element.

12 . The human interface operating device according to claim 5 , wherein the control element is biased towards a neutral position, in which at least one of an axial position or orientation of the control element relative to the base body is predefined.

13 . The human interface operating device according to claim 5 , wherein the control element, at an inside-end section, is provided with a widened portion which, in a radial direction of the control element, protrudes beyond an engagement portion of the shaft, wherein the control element, at an outside-end section, is provided with a knob releasably mounted to the shaft, and wherein a spring element is interposed between the knob and an outer surface of the base body.

14 . The underground mining machine having a human interface operating device according to claim 1 .