Patent ID: 6881136
Filing Date: 2005-04-19
Classification: B24B

Abstract:
1. A grinding-band swaying device for a band grinding machine, said band grinding machine having a worktable on a machine base, an upper frame positioned on the worktable, two upright rollers positioned at two ends of said upper frame, one of said two rollers separated from said upper frame and connected with and driven by a motor, an endless grinding band extending around and moved by said two rollers, said grinding band grinding a work placed vertically on said worktable, said grinding-band swaying device comprising: a pivotal plate provided near said machine base and connected with said motor, said pivotal plate pivotally connected with a corresponding wall of said machine base, said pivotal plate combined with an elastic compressing unit at a preset location, said elastic compressing unit elastically urging said motor towards said machine base, said motor having an upper spindle extending up from its top and a lower spindle extending down from a bottom, said upper spindle connected with a shaft of said roller: a speed-reducing unit positioned under said motor and connected with and driven by said lower spindle, said speed-reducing unit diminishing the rotating speed of said lower spindle and transmitting it to a shaft: an eccentric wheel fixed on and driven by the shaft of said speed-reducing unit, said eccentric wheel keeping elastic compressing against a wall of said machine base by elastic pressing of said motor against said machine base: said eccentric wheel overcoming the elastic pressing of said elastic compressing unit to force said speed-reducing unit, said motor and said roller sway outward when said eccentric wheel rotates, said eccentric wheel also swaying inward by recovery of the elasticity of said elastic compressing unit so that said eccentric wheel may force said speed-reducing unit, said motor and said roller sway upward and downward regularly (in other words, reciprocate).