Claw adjustment device for a crane machine

A claw adjustment device for a crane machine adapted to be installed to a claw device of the crane machine, the claw device including a driving member, a core rod that is retractably mounted to the driving member, a plurality of linkage rods that are circumferentially spaced apart from each other about the driving member, and a plurality of claw bodies that are respectively connected to the plurality of linkage rods, each of the plurality of linkage rods having one end that is connected to the driving member, the claw adjustment device comprising:

• a carrying seat having a core seat portion that is adapted for abutting against the core rod, and a plurality of pivot seat portions that extend radially and outwardly from the core seat portion and that are adapted to be respectively and pivotably connected to the plurality of claw bodies, the core seat portion having a plurality of positioning holes that open upwardly and that are arranged in a circumferential direction about an axis which extends through the carrying seat, each of the plurality of pivot seat portions being formed with a slot that extends therethrough in an extending direction of the axis and that is adapted for the respective one of the plurality of claw bodies to extend thereinto and for positioning the respective one of the plurality of claw bodies;
• an adjusting plate disposed between the carrying seat and the core rod, and having a core plate portion that is placed on the core seat portion of the carrying seat and that has a plate through hole which is adapted for the core rod to extend therethrough, and a plurality of extension portions that extend radially and outwardly from the core plate portion and that respectively cover top ends of the plurality of slots, the adjusting plate being operable to rotate relative to the carrying seat so that an extent to which each of the plurality of extension portions covers the top end of the respective one of the plurality of slots is adjustable;
• a resilient member disposed between the core rod and the adjusting plate, and resiliently biasing the core plate portion of the adjusting plate downwardly in the extending direction of the axis;
• and
• a positioning tenon extending downwardly from the core plate portion of the adjusting plate and operable to be inserted into one of the plurality of positioning holes.