| 摘要 |
724,018. Bearings. MACHINE TOOL WORKS F. STUDER, Ltd. July 4, 1952 [July 7, 1951], No. 16924/52. Class 12 (1) A spindle 1 for a grinding machine is supported at one end in a roller bearing 4 and at the other end it is adjustably mounted in a frusto-conical bush 3. A flange S keyed to the spindle is held against a shoulder of the spindle by a nut 6, with the interposition of a spacing sleeve 7 and a thrust bearing 23, and springs 13 housed in recesses in the bush 3 exert pressure on the front face of the flange through a loosely mounted ring 14 and thrust bearing 15. A nut 17 carrying a scale 18 is mounted on the headstock body, so that when it is rotated clockwise by a handle 21 t transmits axial force from right to left through rods 24 and ring 22 to the flange 5, to move the spindle axially in the bush 3 and adjust the clearance in this bearing. The springs 13 exert an axial thrust on the spindle in the opposite direction to the force exerted by clockwise movement of the nut 17 so as to engage the rods 24 against the nut, and on anti-clockwise movement of the nut the springs cause the spindle to move axially from right to left. When it is required to machine work in stationary stocks, the spindle may be moved to such an extent as to clamp the conical bearing surfaces together. The spindle may be locked by a sliding rod 11 engaging a notch 10 on the flange 5. |
