Block-wedge-type self-locking inner anchor head

A jam-wedge type self-locking inner anchor head belongs to the technical field of rock or concrete anchoring, which is characterized in that: a body (1) is provided with a wedge groove (10) corresponding to an endocone segment (8) in an anchor eye (9); in the wedge groove (10), a pin roll (3) is hinged with one end of a wedge block (2) and the other end of the wedge block (2) faces the orifice of the anchor eye (9) radially extends through an extending mechanism (4). The jam-wedge type self-locking inner anchor head with wide application has the advantages of satisfying the design requirements that anchorage force is allotted to multilayer anchor heads as design requires; the anchor head can be applied to both frontal and inverted conical-surface hole slashes of the anchor eye endocone segment, the anchor head can be linked with various anchor material, such as an anchor rod or an anchor rope, the reliability and durability of anchoring are greatly enhanced, big technical difficult problems in inherent stress anchoring project are solved and the anchor head is particularly applicable to inherent stress anchoring of important projects.