Claims
- 1. A quill drive comprising:
- a housing;
- a hollow quill shaft;
- a drive member rotatably mounted in said housing surrounding said quill shaft and fixed against axial movement;
- means mounting said quill shaft in said housing for slidable longitudinal movement along its axis including spaced bearing surfaces on either side of said drive member;
- cam means drivingly connecting said quill shaft and said drive member producing said longitudinal movement of said quill shaft upon rotation of said drive member in said housing;
- drive means for rotating said drive member;
- a spindle shaft rotatably mounted within said quill shaft and adapted to be carried by said quill shaft with said longitudinal movement; and
- means for rotating said spindle shaft in said quill shaft while said quill shaft is undergoing said longitudinal movement in said housing.
- 2. The quill drive of claim 1 wherein said cam means comprises a ball screw drive in which said drive member is a ball nut, and in which a helical groove is formed about a portion of said quill shaft, and also including a plurality of balls adapted to be circulated between said nut member and said helical grooved portion of said quill shaft.
- 3. The quill drive of claim 2 wherein one of said spaced bearing surfaces bears on said helically grooved portion of said quill shaft.
- 4. The quill drive of claim 2 further including at least one key member fixed to said quill shaft and a longitudinal keyway formed in said housing mating therewith, restraining said quill shaft against rotation during said longitudinal movement.
Parent Case Info
This is a division of application Ser. No. 462,286 filed Apr. 19, 1974, now U.S. Pat. No. 3,885,635 issued May 27, 1975.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
3554046 |
Kirk |
Jan 1971 |
|
3803928 |
Konkal et al. |
Apr 1974 |
|
Divisions (1)
|
Number |
Date |
Country |
Parent |
462286 |
Apr 1974 |
|