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A self-aligning pelletizer cutter hub having a self-aligning driving connection between the cutter hub and drive shaft for the hub in which the cutter hub is capable of universal pivotal movement as well as a driving connection between the drive shaft and cutter hub. The self-aligning hub includes a

A self-aligning pelletizer cutter hub having a self-aligning driving connection between the cutter hub and drive shaft for the hub in which the cutter hub is capable of universal pivotal movement as well as a driving connection between the drive shaft and cutter hub. The self-aligning hub includes an adapter mounted on the end of a drive shaft with the adapter having a partial spherical outer surface that matches a partial spherical inner surface or bore in the cutter hub. The adapter includes diametrically located recesses for receiving spherical balls which are also received in recesses in the inner surface of the cutter hub to transmit driving force from the adapter to the cutter hub. The inner surface of the cutter hub also includes longitudinal recesses extending to one edge thereof and associated with the ball recesses to enable assembly of the balls and the partially spherical surface of the adapter into the hub bore when the adapter is arranged in 90°relation to the surface of the cutter hub with the adapter and balls being inserted into the bore and recesses and then rotated 90°to be parallel to the surfaces of the hub. This locks the adapter in the inner surface of the bore in the cutter hub to maintain the components in assembled relation but yet enable the cutter hub to move universally within the limits defined by the matching partial spherical surfaces with the spherical balls transmitting rotational torque to the hub from the adapter which is rigidly affixed to the drive shaft.

대표청구항 ▼

A self-aligning cutter hub for use in an underwater pelletizer connected to a drive shaft and enabling cutter blades on the cutter hub to be aligned with and move in parallel relation to a die face on an extrusion die plate, said cutter hub including a centrally located axial bore defined by an inne

A self-aligning cutter hub for use in an underwater pelletizer connected to a drive shaft and enabling cutter blades on the cutter hub to be aligned with and move in parallel relation to a die face on an extrusion die plate, said cutter hub including a centrally located axial bore defined by an inner surface, said inner surface of the bore being partially spherical, an adapter in the form of an annular member received in said bore, said adapter including a partially spherical outer surface with the partially spherical surfaces being closely related and matching each other, each of the partially spherical surfaces including at least one recess receiving a torque transmitting element partially received in the recesses in the matching surfaces to drivingly connect the hub to the adapter and enable pivotal movement of the hub in relation to the adapter by relative angular movement of the hub in relation to the adapter, said adapter secured to a drive shaft for transmitting torque to the cutter hub.