Spindle device
Provided is a spindle device which can inhibit the spreading of the exterior shape of a housing in the radial direction of a shaft. One embodiment relates to a spindle device having a tubular member which is fixed to a housing through which a shaft is inserted, and which extends to outside along the axial direction of the shaft from an end surface of the housing on the other end side of the shaft. The spindle device includes: a holding part which is provided to the end surface of the housing outside of the outer peripheral surface of the tubular member, and which holds a linear member that extends along the axial direction of the shaft and passes inside of the housing; and a cut-out section formed in the outer peripheral surface of the tubular member. At least a portion of the holding part is disposed on the inner side of the cut-out section.
1 . A spindle device comprising:
a shaft;
a housing through which the shaft is inserted;
a bearing configured to rotatably support the shaft with respect to the housing;
a tubular member fixed to the housing and extending outward along an axial direction of the shaft from an end surface of the housing that is located on another end side of the shaft;
a slider configured to slide inside a tube of the tubular member along the axial direction of the shaft; and
a clamping unit configured to selectively perform clamping and unclamping on a tool inserted into a through hole penetrating the shaft along the axial direction of the shaft, in accordance with sliding of the slider,
wherein the spindle device further comprises:
a holding portion provided on the end surface of the housing outside an outer peripheral surface of the tubular member and extending along the axial direction of the shaft, the holding portion being configured to hold a line-shaped member passing through an inside of the housing; and
a cutout portion formed in the outer peripheral surface by reducing a thickness of the outer peripheral surface of the tubular member in part, and
wherein at least part of the holding portion is disposed inside a space formed by the cutout portion.
2 . The spindle device according to claim 1 , wherein
an entirety of the holding portion is disposed inside the cutout portion.
3 . The spindle device according to claim 1 , wherein
the cutout portion comprises a plurality of cutout portions that are formed at intervals in a circumferential direction of the tubular member.
4 . The spindle device according to claim 1 , wherein
the line-shaped member is configured to allow a fluid to flow therethrough.
5 . The spindle device according to claim 1 , wherein
the line-shaped member is configured to allow a drive current to be supplied therethrough.
6 . The spindle device according to claim 5 , wherein
the line-shaped member is connected to at least one of a motor provided inside the housing, or a rotation sensor configured to detect a rotational speed of the motor.