Patent ID: 6488136
Filing Date: 2002-12-03
Classification: B25B

Abstract:
An improved ratchet wheel structure for a ratcheting wrench, having an accommodating groove of a ratchet wheel on a fixing base of the ratchet of the ratcheting wrench, and a cross base being protruded from the rim at the bottom of the accommodating groove of the ratchet wheel, such that the diameter of a restricting hole on the cross base is slightly smaller than an insert hole at the upper end of the ratchet wheel, and the external diameter of the ratchet wheel is slightly smaller than the diameter of the insert hole of the fixing base, and a latching groove is disposed around an appropriate position in the positioning area for embedding a C-shape buckle into the latching groove for positioning, and the ratchet wheel being embedded into the accommodating groove of the ratchet wheel such that a serrated disk and a restricting base of the ratchet wheel just fall into the cross base and restricting hole of the accommodating groove for the positioning, and the C-shape buckle being embedded into the inner edge of the insert hole in the accommodating groove, thereby the ratchet wheel in the accommodating groove is secured from being fallen off; characterized in that:a restricting base being disposed at the bottom of the ratchet wheel, such that the external diameter of the restricting base is slightly smaller than the diameter of the restricting hole of the fixing base and it extends to the intersection point of the ratchet of the ratchet wheel to form a serrated disk, and the ratchets being aligned parallel to the axial direction in the middle section of the ratchet wheel and it extends to the intersection point of the positioning section such that the tip of the ratchet is corresponsive to the external diameter of the ratchet wheel, and then the ratchet can keep the minimum external diameter for the ratchet wheel and obtain the maximum effective diameter for the ratchet so that when a spring pushes a pawl of a blocking member to engage the ratchet, it strengthens the ratchets and prevents the ratchets from being cracked.