Apparatus for controlling the position of a mining machine

Apparatus for controlling the position of a mineral mining machine guided for movement on guide means;

• said apparatus comprising sets of elongate beams each supported at one end remote from the guide means, connecting devices each pivotably connected to the guide means and swivelably coupled to one of the sets of beams and piston and cylinder units each connected with a ball-and-socket joint to one of the connecting device and to the guide means and being in an inclined disposition, each of the units being operable to tilt the guide means about the pivot axis between the associated connecting device and the guide means.

A mineral mining installation comprising a scraper-chain conveyor with a machine guide at one side;

• roof support structures arranged at the opposite of the conveyor, a set of beams guidably connected with each support structure, connecting means for effecting pivotal connection between each set of beams and the conveyor and piston and cylinder units operable to adjust the position of the conveyor and the guide;
• the units being connected between the conveyor and the connecting means in an inclined disposition and coupled to the connecting means with ball-and-socket type joints.

In an apparatus for controlling the position of a mining machine guided on guide means an comprising piston and cylinder units operably coupled between the guide means and a set of elongate beams connected to a roof support structure;

• an improved connection system comprising multipart devices each defining part of a ball-and-socket joint between the device and an associated piston and cylinder unit, means pivotably connecting said devices with the guide means and head pieces each interconnecting each set of beams and being pivotably connected to an associated device, the axis of pivoting between each device and the guide means being substantially perpendicular to the axis of pivoting between the device and its associated head piece with the ball and socket joint being located on the device between its pivotal connections with the guide means and the head piece.

Apparatus for controlling the position of a mineral mining machine movable along guide means;

• said apparatus comprising beams pivotably connected to the guide means with connecting means and pivotably and displaceably connected with a support structure, at least one piston and cylinder unit operable to adjust the angle between the guide means and the beams, the unit being connected to the connecting means with a ball-and-socket type joint at a position disposed outwardly from the pivot axis between the guide means and the beams, wherein the beams are connected to the connecting means with a swivel joint with a pivot axis extending substantially perpendicularly to a further pivot axis between the connecting means and the guide means.

Apparatus for controlling the position of a mineral mining machine movable along guide means;

• said apparatus comprising beams pivotably connected to the guide means with connecting means and pivotably and displaceably connected with a support structure, at least one piston and cylinder unit operable to adjust the angle between the guide means and the beams, the unit being connected to the connecting means with a ball-and-socket type joint at a position disposed outwardly from the pivot axis between the guide means and the beams, wherein the ends of the beams nearest the connecting means are connected to a head piece rotatably mounted to the connecting means.

Apparatus for controlling the position of a mineral mining machine movable along guide means;

• said apparatus comprising beams pivotably connected to the guide means with connecting means and pivotably and displaceably connected with a support structure, at least one piston and cylinder unit operable to adjust the angle between the guide means and the beams, the unit being connected to the connecting means with a ball-and-socket type joint at a position disposed outwardly from the pivot axis between the guide means and the beams, wherein the connecting means comprises two detachably interconnecting complementary parts collectively defining the socket part of the ball-and-socket joint and wherein the parts of the connecting means have bores receiving a pivot pin, defining the pivot axis and between the connecting means and the guide means, and located within recesses of a coupling plate detachably secured to the guide means.