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US 2023/0415285 A1Published application
Spindle device
AssigneeFanuc Corporation
InventorToshifumi MURAMATSU
Life of this patent
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Abstract
A spindle device includes: a spindle: a drawbar provided in a through-hole in the spindle; a plurality of balls that clamp or unclamp a pull stud in response to the drawbar moving forward or backward; and a seal member fixed to a wall surface that forms a flow path in the drawbar, so as to come into contact with an inclined surface of the inclined section of the pull stud clamped by the plurality of balls.
Claims3
A spindle device comprising:
- a spindle that is formed with a through hole penetrating along an axial direction;
- a draw bar that is provided in the through hole, is configured to advance and retreat with respect to one end of the spindle, and is formed with a flow path communicating with the through hole along the axial direction;
- and
- a plurality of balls that are movable in a radial direction of the spindle in accordance with advance and retreat of the draw bar and clamp or unclamp a pull stud inserted into the through hole from one end of the spindle,
- wherein the pull stud is formed with a flange including
- a projecting portion that projects from an outer peripheral surface of the pull stud, and
- an inclined portion that reduces in diameter from the projecting portion toward a distal end of the pull stud, and
- the spindle device further comprises a sealing member that is fixed to a wall surface forming the flow path of the draw bar so as to make contact with an inclined surface of the inclined portion of the pull stud clamped by the plurality of balls.
5 more elements
Dependencies are inferred from the claim text.