Shearer-loader drive subassembly and guide shoe for it

1. A shearer-loader drive subassembly, comprising:

a rotatably-mounted drive sprocket for engaging in a rack arrangement adapted to propel the shearer-loader;

a transmission gear arranged coaxially to a rotation axis of the drive sprocket and connected to the drive sprocket in a rotationally-fixed manner;

at least one releasable guide shoe provided for guiding the shearer-loader on the rack arrangement; and

a housing base plate on which a bearing tube arranged coaxially to the rotation axis of the drive socket is supported and fastened in a rotationally-fixed manner,

wherein the guide shoe is fastened to the base plate by a releasable pin that passes through an inner bore of the bearing tube and forms a pivot bearing for the guide shoe.

2. The shearer-loader drive subassembly of claim 1 , further comprising:

a bearing sleeve rotatably supported on the bearing tube by at least one first bearing, wherein

the bearing sleeve is arranged between the drive sprocket and the bearing tube; and

the drive sprocket is pushed onto the bearing sleeve in a releasable manner from a bearing tube end remote from the housing base plate.

3. The shearer-loader drive subassembly of claim 2 , wherein the bearing sleeve is supported on the bearing tube by the at least one first bearing arranged in a bearing section of the bearing sleeve and has a sleeve section which extends up to a second bearing, onto which a hub of the transmission gear is pushed.

4. The shearer-loader drive subassembly of claim 2 , wherein the bearing tube and the bearing sleeve each include a shoulder for arranging the at least one first bearing.

5. The shearer-loader drive subassembly of claim 3 , wherein at least one of the first bearing or the second bearing includes a twin-row antifriction bearing.

6. The shearer-loader drive subassembly of claim 1 , wherein

the drive sprocket is connected to the transmission gear by at least one axial screw; and

the drive sprocket is coupled to the transmission gear by at least one of feather keys or a splinted shaft connection.

7. The shearer-loader drive subassembly of claim 6 , wherein

the drive sprocket includes a first side wall and at least one collar located on the first side wall;

the transmission gear includes at least one side flank and at least one recess located in the at least one side flank; and

the at least one collar is engaged in the at least one recess in a rotationally-locked manner.

8. The shearer-loader drive subassembly of claim 7 , wherein

the drive sprocket includes a second side wall and at least one annular collar located on the second side wall;

the at least one annular collar extends beyond the first bearing up to the end face of the bearing sleeve; and

the at least one annular collar is includes a circumferential groove operable for use of a pull-off tool.

9. The shearer-loader drive subassembly of claim 8 , wherein the at least one annular collar includes a spherically arched surface.

10. The shearer-loader drive subassembly of claim 1 , wherein

the guide shoe is of one-piece design and includes a base wall having a guide extension for engaging underneath the rack arrangement; and

the guide shoe includes an opposing wall opposite the base wall, the opposing wall having a guide extension for engaging behind the rack arrangement.

11. The shearer-loader drive subassembly of claims 1 , wherein the releasable pin projects on both ends from the bearing tube and engages in a first through-opening located in a base wall of the guide shoe and in a second through opening located in an opposing wall of the guide shoe.

12. A guide shoe for a shearer-loader drive subassembly, comprising:

at least one base wall including a first through-opening adapted to accept and engage a pin;

at least one opposing wall located opposite the at least one base wall and having a second through-opening adapted to accept and engage the pin;

a guide extension formed on the at least one base wall, the guide extension adapted to engage underneath a rack arrangement and to releasably fasten the guide shoe to a base plate of the subassembly; and

a subassembly-side bearing tube,

wherein the pin is inserted into the subassembly-side bearing tube for the pivotable mounting and support of the guide shoe.

13. The guide shoe of claim 12 , wherein

the guide shoe is of one-piece design; and

the opposing wall includes a second guide extension for engaging behind the rack arrangement.