Extended ratchet wrench

An extended ratchet wrench, comprising a body, a tool head, and a fixing ring;

• wherein the body comprises a casing body, a motor, a reducing gear set, and a first coupling member;
• the casing body has a head and a tail that are disposed in sequence along an axis;
• two opposite directions along the axis are respectively defined as a first direction and a second direction;
• the head is located on a side of the tail facing the first direction;
• the head has a first axial hole;
• a side of the head facing the first direction has a first positioning surface, a first positioning structure, and an outer threaded portion that are concentric with the first axial hole;
• the motor, the reducing gear set, and the first coupling member are disposed in the casing body with the axis as a rotation center and are connected in sequence along the first direction;
• the first coupling member rotatably passes through the first axial hole;
• wherein the tool head comprises a rod body, a driven head assembly, and a drive shaft;
• the rod body has an engaging base, a neck tube, and a support portion that are connected in sequence along the first direction;
• a second axial hole penetrates through the rod body along the axis;
• the engaging base is adjacently connected to the head of the body;
• a side of the engaging base facing the second direction has a second positioning surface and a second positioning structure that are concentric with the second axial hole;
• the second positioning surface is in contact with the first positioning surface;
• the second positioning structure matches with the first positioning structure in a convex-concave manner at any one of a plurality of angles with the axis as a rotation center;
• the driven head assembly is mounted on the support portion;
• the drive shaft passes through the second axial hole;
• one of two opposite ends of the drive shaft is engaged with the driven head assembly, and the other of the two opposite ends of the drive shaft has a second coupling member;
• the second coupling member is coupled to the first coupling member;
• wherein the fixing ring fits around the rod body;
• an inner side of the fixing ring has a hooking surface and an inner threaded portion;
• the inner threaded portion is screwed with the outer threaded portion of the body;
• the hooking surface hooks the engaging base in the second direction.