Reversible ratcheting tool with a smaller head and improved driving torque
DCFirst Claim
1. A ratcheting tool comprising:
- a handle;
a head extended from the handle and having a compartment therein;
a drive member including a first end extended beyond the compartment, a second end extended beyond the compartment, and a gear wheel formed between the first end and the second end, the gear wheel being rotatably mounted in the compartment and including an outer periphery with a plurality of first teeth;
a pawl mounted in the compartment and including a fist side with a plurality of second teeth facing the first teeth of the gear wheel and a second side facing away from the gear wheel, the second teeth of the pawl including a first teeth portion having a first center of curvature and a second teeth portion having a second center of curvature located at a position different from the first center of curvature;
a ring mounted in the compartment and around the first end of the drive member, the ring being operably connected to the pawl such that the ring and the pawl are pivotable about a rotational axis of the gear wheel and that the pawl is movable in a radial direction relative to the ring;
a reversing plate mounted to the first end of the drive member and pivotable about the rotational axis of the gear wheel between a first position and a second position;
means for retaining the reversing plate in position; and
means for providing transmission between the reversing plate and the pawl for moving the pawl between a first ratcheting position and a second ratcheting position, wherein the first teeth portion of the pawl is engaged with the first teeth of the gear wheel for ratcheting in a first direction and the second teeth portion of the pawl is disengaged from the first teeth of the gear wheel when the pawl is in the fist ratcheting position, and wherein the second teeth portion of the pawl is engaged with the first teeth of the gear wheel for ratcheting in a second direction opposite to the first direction and the first teeth portion of the pawl is disengaged from the first teeth of the gear wheel when the pawl is in the second ratcheting position.
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Abstract
A ratcheting tool includes a handle and a head with a compartment. A drive member includes a first end extended beyond the compartment, a second end extended beyond the compartment, and a gear wheel formed between the first end and the second end. The gear wheel is rotatably mounted in the compartment and includes a toothed outer periphery. A pawl is mounted in the compartment and includes a toothed side facing the gear wheel teeth. The toothed side of the pawl includes a first teeth portion having a first center of curvature and a second teeth portion having a second center of curvature located at a position different from the first center of curvature. A ring is mounted in the compartment and around the first end of the drive member. The ring is operably connected to the pawl such that the ring and the pawl are pivotable about a rotational axis of the gear wheel and that the pawl is movable in a radial direction relative to the ring. A reversing plate is mounted to the first end of the drive member and pivotable about the rotational axis of the gear wheel between a first position and a second position. A spring having a small pitch provides transmission between the reversing plate and the pawl for moving the pawl between a first ratcheting position and a second ratcheting position.
190 Citations
25 Claims
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1. A ratcheting tool comprising:
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a handle;
a head extended from the handle and having a compartment therein;
a drive member including a first end extended beyond the compartment, a second end extended beyond the compartment, and a gear wheel formed between the first end and the second end, the gear wheel being rotatably mounted in the compartment and including an outer periphery with a plurality of first teeth;
a pawl mounted in the compartment and including a fist side with a plurality of second teeth facing the first teeth of the gear wheel and a second side facing away from the gear wheel, the second teeth of the pawl including a first teeth portion having a first center of curvature and a second teeth portion having a second center of curvature located at a position different from the first center of curvature;
a ring mounted in the compartment and around the first end of the drive member, the ring being operably connected to the pawl such that the ring and the pawl are pivotable about a rotational axis of the gear wheel and that the pawl is movable in a radial direction relative to the ring;
a reversing plate mounted to the first end of the drive member and pivotable about the rotational axis of the gear wheel between a first position and a second position;
means for retaining the reversing plate in position; and
means for providing transmission between the reversing plate and the pawl for moving the pawl between a first ratcheting position and a second ratcheting position, wherein the first teeth portion of the pawl is engaged with the first teeth of the gear wheel for ratcheting in a first direction and the second teeth portion of the pawl is disengaged from the first teeth of the gear wheel when the pawl is in the fist ratcheting position, and wherein the second teeth portion of the pawl is engaged with the first teeth of the gear wheel for ratcheting in a second direction opposite to the first direction and the first teeth portion of the pawl is disengaged from the first teeth of the gear wheel when the pawl is in the second ratcheting position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A ratcheting tool comprising:
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a rotatably mounted drive member including a gear wheel having an outer periphery with a plurality of first teeth; and
a pawl including a first side with a plurality of second teeth facing the fist teeth of the gear wheel and a second side facing away from the gear wheel, with the second teeth of the pawl including a first teeth portion having a first center of curvature and a second teeth portion having a second center of curvature located at a position different from the first center of curvature, with the pawl being movable between a first ratcheting position and a second ratcheting position, wherein the first teeth portion of the pawl is engaged with the fist teeth of the gear wheel for ratcheting in a first direction and the second teeth portion of the pawl is disengaged from the first teeth of the gear wheel when the pawl is in the first ratcheting position, and wherein the second teeth portion of the pawl is engaged with the first teeth of the gear wheel for ratcheting in a second direction opposite to the first direction and the first teeth portion of the pawl is disengaged from the first teeth of the gear wheel when the pawl is in the second ratcheting position. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25)
a reversing plate pivotable about an axis between a first position and a second position, with pivotable movement of the reversing plate being transmitted to the pawl with the pawl being in the first ratcheting position when the reversing plate is in the first position and the pawl being in the second ratcheting position when the reversing plate is in the second position.
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24. The ratcheting tool as claimed in claim 23, with the drive member being rotatably mounted about a rotational axis, with the axis of the reversing plate being the rotational axis of the drive member.
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25. The ratcheting tool as claimed in claim 23, with the reversing plate having a thumb piece projected therefrom for manual operation.
Specification