Ratchet wrench with dual-rotating constant drive handle

B - Operations – Transporting – 25 – B

Patent

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Details

B25B 13/46 (2006.01)

Patent

CA 2093523

A ratchet wrench (10) having a handle (12) through which a rotatable shaft (16) extends. A bevel gear (26) is coupled to one end of the shaft for rotation by the shaft about an input drive axis. A pair of concentrically aligned ring gears (30, 32) are coupled to the bevel gear for counter rotation of the ring gears, by the bevel gear, about an output drive axis perpendicular to the input drive axis. A drive member (64) is mounted inside the ring gears for rotation about the output drive axis. A ratchet mechanism (42, 44, 52, 54) couples the ring gears to the drive member such that, for either direction of rotation of the bevel gear, one of the ring gears is coupled to the drive member and the other of the ring gears is decoupled from the drive member The ring gears are further coupled to the bevel gear for unidirectional rotation of the ring gears about the output drive axis in response to pivotal movement of the handle about the output drive axis. The ratchet mechanism additionally couples the ring gears to the drive member such that, upon such unidirectional rotation of the ring gears about the output drive axis, both of the ring gears are coupled to the drive member.

Clé à cliquet (10) dotée d'un manche (12) traversé par un axe rotatif (16). Un pignon conique (26) est couplé à l'une des extrémités de l'axe, tournant solidairement avec celui-ci pour la transmission du couple d'entraînement. Une paire de couronnes (30 et 32) contrarotatives à dentures intérieures concentriques commandées par le pignon et montées perpendiculairement à l'axe d'entraînement assurent la transmission du couple à un organe d'attaque (64) monté dans l'axe de sortie à l'intérieur des couronnes. Un mécanisme à cliquet (42, 44, 52 et 54) assure la mise en prise des couronnes, de telle sorte que, quel que soit le sens de rotation du pignon conique, l'organe d'attaque est toujours en prise avec l'une ou l'autre couronne. Les couronnes sont également en prise avec le pignon conique pour la transmission du mouvement de rotation imprimé par le pivotement de la poignée dans le sens de l'entraînement. Le mécanisme à cliquet assure la mise en prise des deux couronnes avec l'organe d'attaque quel que soit le sens de rotation de l'axe rotatif.

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