US 2010/0172707 A1 · VIBRATION-REDUCTION MECHANISM FOR GEAR CUTTING MACHINE

Abstract

This aims to provide a vibration-suppressing mechanism for a gear-shaping machine, which is enabled to suppress mechanical vibrations at the time of shaping a helical gear by selecting an optimum balance weight. The vibration-suppressing machine is provided for the gear-shaping machine which performs the gear shaping on a work (W) with a cutter (T) mounted on a main spindle (26) of crank reciprocations. The vibration-suppressing machine comprises balance shafts (16 and 17) juxtaposed with set respect to a crankshaft (15), for rotating at an identical rotation speed in synchronism with the crankshaft (15) and in the same and opposite directions as and to that of the crankshaft (15), main balance weights (41 and 42) removably mounted on the crankshaft (15), for suppressing the axial vibrations of the main spindle (26), and auxiliary balance weights (43 to 46) removably mounted on the balance shafts (16 and 17), for suppressing the vibrations of in directions perpendicular to the axial direction of the main spindle (26). Those individual balance weights (41 to 46) are selected on the basis of leads meeting the stroke width of the main spindle (26) and the torsional angle of the work (W).

Claims3

Dependent claims

A vibration-reduction mechanism for a gear cutting machine that performs gear cutting on a gear blank with a rotary tool attached to a main shaft made to move reciprocally by a crank mechanism, the vibration-reduction mechanism characterized by comprising:

a first balancer shaft and a second balancer shaft which are arranged in parallel to a crank shaft of the crank mechanism, and which rotate synchronously with the crank shaft at a same speed as a speed of the crank shaft, the first balancer shaft rotating in an opposite direction to a rotational direction of the crank shaft and the second balancer shaft rotating in a same direction as the rotational direction of the crank shaft;
main balancer weights detachably attached onto the crank shaft so as to reduce vibrations in an axial direction of the main shaft;
and
sub balancer weights detachably attached onto the first and the second balancer shafts so as to reduce vibrations in directions that are orthogonal to the axial direction of the main shaft, characterized in that
the main balancer weights and the sub balancer weights are selected on the basis of a stroke width of the main shaft and on the basis of a helical angle to be formed in the gear blank.

2 more elements

Dependencies are inferred from the claim text.

Vibration-reduction mechanism for gear cutting machine

Life of this patent

Vibration-reduction mechanism for gear cutting machine

Life of this patent

Abstract

Claims3