Freely rotatable closed grapple head and machine using same

Details Freely rotatable closed grapple head and machine using same Freely rotatable closed grapple head and machine using same

B - Operations, Transporting

66

C

B66C 1/58 (2006.01) B66C 3/16 (2006.01) E02F 3/413 (2006.01)

Patent

CA 2674293

A machine (10) includes a chassis (12) and a boom assembly (14). The boom assembly (14) is movable relative to the chassis (12). The machine (10) further includes a grapple assembly (16) suspended from the boom assembly (14). The grapple assembly (16) comprises a grapple head (18) fluidly connected to a first hydraulic circuit (57) for actuating the grapple head (18) to a grasping configuration, and a hydraulic motor (24) fluidly connected to a second hydraulic circuit (71) for rotating the grapple head (18). The second hydraulic circuit (71) includes a bypass valve (72). The bypass valve (72) has a first position configured to block a fluid flow between a first port (64) of the hydraulic motor (24) and a second port (66) of the hydraulic motor (24). The bypass valve (72) also has a second position configured to allow a fluid flow between the first port (64) of the hydraulic motor (24) and the second port (66) of the hydraulic motor (24). The bypass valve (72) allows the grapple head (18) to rotate freely when the grapple head (18) is in a grasping configuration.

Une machine (10) comprend un châssis (12) et un ensemble de bras (14). L'ensemble de bras (14) est mobile par rapport au châssis (12). La machine (10) comprend en outre un ensemble de grappin (16) suspendu à partir de l'ensemble de bras (14). L'ensemble de grappin (16) comprend une tête de grappin (18) reliée de façon fluide à un premier circuit hydraulique (57) pour actionner la tête de grappin (18) vers une configuration de préhension, et un moteur hydraulique (24) relié de façon fluide à un second circuit hydraulique (71) pour faire tourner la tête de grappin (18). Le second circuit hydraulique (71) comprend une soupape de dérivation (72). La soupape de dérivation (72) a une première position configurée pour bloquer un écoulement de fluide entre un premier orifice (64) du moteur hydraulique (24) et un second orifice (66) du moteur hydraulique (24). La soupape de dérivation (72) a également une seconde position configurée pour permettre à un fluide de s'écouler entre le premier orifice (64) du moteur hydraulique (24) et le second orifice (66) du moteur hydraulique (24). La soupape de dérivation (72) permet à la tête de grappin (18) de tourner librement lorsque la tête de grappin (18) est dans une configuration de préhension.

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