Reversible ratchet wrench

摘要

A reversible ratchet wrench includes a direction-selecting rotary knob disposed rotatably on a driving head and rotatable relative to the driving head between a clockwise position and a counterclockwise position such that, at the clockwise position, a pawl unit is connected between the driving head and a ratchet head so as to allow for clockwise co-rotation of the driving head and the ratchet head, while preventing counterclockwise co-rotation of the driving head and the ratchet head, and at the counterclockwise position, the pawl unit is connected between the driving head and the ratchet head so as to allow for counterclockwise co-rotation of the driving head and the ratchet head, while preventing clockwise co-rotation of the driving head and the ratchet head.

主权项

1. A reversible ratchet wrench characterized by:
a ratchet head including an annular driving toothed portion defining a through hole; a driving head extending rotatably through the through hole and having an outer peripheral surface formed with an accommodating space aligned with the annular driving toothed portion; a pawl unit including a first pawl and a second pawl that are disposed in the accommodating space, the first and second pawls overlapping each other, each of the first and second pawls having a ratchet toothed portion engageable with the annular driving toothed portion such that, when one of the first and second pawls meshes with the annular driving toothed portion, the other of the first and second pawls cannot mesh with the annular driving toothed portion; and a direction-selecting rotary knob disposed rotatably on the driving head and rotatable relative to the driving head between a clockwise position and a counterclockwise position such that, at the clockwise position, the pawl unit is connected between the driving head and the ratchet head so as to allow for clockwise co-rotation of the driving head and the ratchet head, while preventing counterclockwise co-rotation of the driving head and the ratchet head, and at the counterclockwise position, the pawl unit is connected between the driving head and the ratchet head so as to allow for counterclockwise co-rotation of the driving head and the ratchet head, while preventing clockwise co-rotation of the driving head and the ratchet head.