Link chain for chain conveyors and horizontal chain links therefor

A link chain, comprising:

• vertical chain links which have around the full circumference a constant cross-sectional profile provided on the inside with a circular arc and on the outside with a flat section;
• horizontal chain links which have front sections with a straight face zone and longitudinal limbs, which connect the front sections around an oval inner opening and which are provided on their outer surfaces with a recess;
• wherein the rear sides of the front sections delimiting the inner opening form a contact zone for the circular arcs of the vertical chain links, the horizontal chain links are provided on the rear sides, which face the oval inner opening, of the front sections with a surface which has a hollow, which forms a central region of the contact zone, within a fillet cambered in a crowned manner;
• and
• wherein at least one horizontal chain link is provided on both sides in the recesses with an entrainment nose formed centrally between both front sections, each entrainment nose protruding in a projecting manner into the relevant recess.

A chain link, preferably for connection of entrainment scrapers to link chains for scraper chain conveyors for use in mining, comprising:

• front sections with a straight face zone and with longitudinal limbs, which connect the front sections around an oval inner opening and which are provided on their outer surfaces with a recess,
• wherein the rear sides of the front sections delimiting the inner opening form a contact zone for circular arcs of vertical chain links and connect the longitudinal limbs to a semi-circular portion, the rear sides which face the oval inner opening of the front sections being provided with a surface which has a hollow, which forms a central region of the contact zone, between a fillet cambered in a crowned manner;
• and
• wherein the chain link is provided on both sides in the recesses with an entrainment nose formed centrally between both front sections protrudes into the relevant recess.

A link chain for chain conveyors, comprising:

• vertical chain links which have around the full circumference a constant cross-sectional profile provided on the inside with a circular arc and on the outside with a flat section;
• horizontal chain links which have front sections with a straight face zone and longitudinal limbs, which connect the front sections around an oval inner opening and which are provided on their outer surfaces with a recess;
• wherein the rear sides of the front sections delimiting the inner opening form a contact zone for the circular arcs of the vertical chain links, the horizontal chain links are provided on the rear sides, which face the oval inner opening, of the front sections with a surface which has a hollow, which forms a central region of the contact zone, within a fillet cambered in a crowned manner;
• wherein the hollow extends with a constant radius of curvature across the surface of the rear sides of the front sections and the radius of curvature of the hollow has a crown line which lies on a central longitudinal plane between the longitudinal limbs of the horizontal chain links and the hollow on the rear side of the front sections comprises a rotationally symmetrical unwinding of the radius of curvature around the centre point of the front sections.