Machine tool feed screw drive

Details Machine tool feed screw drive Machine tool feed screw drive

1982-01-29

1984-05-22

Whitehead, Harold D.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

74664, 192 8R, 192 2, 474148, B24B 4702

Patent

active

044499884

ABSTRACT:
A surface grinding machine wherein a tool holder is mounted on an upright feed screw which is in mesh with a rotary spindle nut. The latter is held against axial movement in the column of the grinding machine and is normally driven by a torque transmitting unit having an endless toothed belt trained over a first pulley which is coaxial with the nut and a second pulley mounted on the output shaft of an electric motor. A gear train is installed in parallel with the torque transmitting unit to prevent automatic lowering of the tool holder when the belt breaks. The gear train has a first gear coaxial with the first pulley, a second gear coaxial with the second pulley and an additional gear meshing with the first and second gears. The tension of the belt is monitored by a detector which transmits a signal when the belt breaks, and such signal is used to immediately arrest the motor.

REFERENCES:
patent: 2471969 (1949-05-01), Meyer
patent: 3260125 (1966-07-01), Dolza
patent: 3401777 (1968-09-01), Williams
patent: 3434246 (1969-03-01), Adlaf
patent: 3695402 (1972-10-01), Klemm
patent: 4226311 (1980-10-01), Johnson

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