Expansion bolts sleeve and expansion bolts

The utility model relates to an expansion bolts sleeve and expansion bolts belongs to fastener technical field. The expansion bolts sleeve, including the sleeve body, the sleeve body be inside hollowtube structure, the sleeve body distributes with the axial of second end along the sleeve body including relative first end that sets up and second end, first end, two at least inflation grooves havebeen seted up to the sleeve body, two at least inflation grooves along the circumference rotational symmetry of sleeve body, the inflation groove by first end towards the extension of second end, theflute length in the groove of expanding be greater than the length of sleeve body the quartering three. The expansion bolts sleeve, structural design is reasonable, and the flute length in inflation groove is longer, has improved the bulging force of this expansion bolts sleeve with the expansion bolts of screw set one -tenth greatly. Adopting the telescopic expansion sleeve of above -mentioned expansion bolts, in the use,