Patent ID: 8375830

Claim:
A ratchet wrench comprising a main body, said main body formed with an operating end having one side provided with a recessed surface, under said recessed surface disposed with an accommodating groove and a receiving groove communicating with each other, said operating end having another side bored with a through hole communicating with said accommodating groove, said main body having an outer side set with an orientating member, a driving gear received in said accommodating groove of said main body, said driving gear provided with gear teeth and a sleeve-engaging rod, a driven gear fixed in said receiving groove of said main body, said driven gear disposed with gear teeth to be meshed with said gear teeth of said driving gear, a cover plate covered on said recessed surface of said main body, said cover plate bored with a through hole for said sleeve-engaging rod of said driving gear to be inserted therethrough, said receiving groove of said main body provided with ratchet teeth on an inner wall, said driving gear being ball-shaped, each said gear tooth of said driving gear having an outer wall formed into an arc-shaped surface, a concave surface formed between every said gear teeth of said driven gear to match with said arc-shaped surfaces of said gear teeth of said driving gear, said gear teeth of said driven gear respectively secured thereon with plural ratchet teeth, said ratchet teeth of said driven gear meshed with said ratchet teeth on the inner wall of said receiving groove of said main body, said driven gear bored with a through hole received therein with an interaction member, said interaction member having one end connected with said orientating member at an outer side of said main body, said interaction member having another end positioned on said cover plate, said interaction member bored with an insert hole, a pressing piece fixed on said interaction member and received in said through hole of said driven gear, said pressing piece provided with a projecting post to be inserted in said insert hole of said interaction member, a spring fitted around said projecting post of said pressing piece, said spring located between said pressing piece and said interaction member.