Spindle device

Patent metadata

Field	Value
Publication number	US-11052503-B2
Application number	US-201916516533-A
Country	US
Kind code	B2
Filing date	Jul 19, 2019
Priority date	Jul 23, 2018
Publication date	Jul 6, 2021
Grant date	Jul 6, 2021

Abstract

A spindle device includes a spindle housing, a spindle shaft rotatably supported inside the spindle housing, a spindle mount having an insertion cavity into which the spindle housing is inserted along the axial direction of the spindle shaft, and a mount cover covering the spindle mount. A temperature regulator for adjusting the temperature inside the mount cover is provided inside the mount cover.

First claim

What is claimed is:

1. A spindle device comprising:
a spindle housing;
a spindle shaft configured to be rotatably supported inside the spindle housing;
a spindle mount having an insertion cavity into which the spindle housing is inserted along an axial direction of the spindle shaft;
a mount cover configured to cover the spindle mount; and
a temperature regulator provided inside the mount cover and configured to adjust a temperature inside the mount cover,
wherein
part of a seal gas supplied to a gap between a rotating member rotatably arranged on one end side of the spindle shaft in the spindle housing and a cover member covering an outer peripheral surface of the rotating member flows into a gas supply tube;
the gas supply tube is connected to the mount cover;
the temperature regulator includes a radiator plate fixed to an outer peripheral surface of the spindle mount;
the radiator plate includes a first radiator piece and a second radiator piece arranged so as to be separated by a space from the first radiator piece;
the second radiator piece is arranged closer to one end side of the spindle shaft where a rotating member rotatable in conjunction with the spindle shaft is arranged, than the first radiator piece is; and
a tube through which a coolant flows is attached to the radiator plate.

2. The spindle device according to claim 1 , wherein the space is configured to extend in a direction intersecting an axial direction of the spindle shaft.

3. The spindle device according to claim 1 , wherein a surface area of the second radiator piece is configured to be larger than that of the first radiator piece.

4. The spindle device according to claim 1 , wherein each of the first radiator piece and the second radiator piece is fixed at one place to the spindle mount.

5. A spindle device comprising:
a spindle housing;
a spindle shaft configured to be rotatably supported inside the spindle housing;
a spindle mount having an insertion cavity into which the spindle housing is inserted along an axial direction of the spindle shaft;
a mount cover configured to cover the spindle mount; and
a temperature regulator provided inside the mount cover and configured to adjust a temperature inside the mount cover,
wherein a cooling passage configured to cool a gas supplied thereto is formed in the spindle mount, and the gas that has flowed through the cooling passage is supplied to a gas supply destination, wherein:
the temperature regulator includes a radiator plate fixed to an outer peripheral surface of the spindle mount; and
a tube through which a coolant flows is attached to the radiator plate, wherein:
the radiator plate includes a first radiator piece and a second radiator piece arranged so as to be separated by a space from the first radiator piece; and
the second radiator piece is arranged closer to one end side of the spindle shaft where a rotating member rotatable in conjunction with the spindle shaft is arranged, than the first radiator piece is.

6. The spindle device according to claim 5 , wherein the space is configured to extend in a direction intersecting an axial direction of the spindle shaft.

7. The spindle device according to claim 5 , wherein a surface area of the second radiator piece is configured to be larger than that of the first radiator piece.

8. The spindle device according to claim 5 , wherein each of the first radiator piece and the second radiator piece is fixed at one place to the spindle mount.

9. The spindle device according to claim 5 , wherein the gas supply destination is a gap between a rotating member rotatably arranged on one end side of the spindle shaft in the spindle housing and a cover member covering an outer peripheral surface of the rotating member.

10. The spindle device according to claim 5 , wherein the gas supply destination is a bearing that rotatably supports the spindle shaft.

11. A spindle device comprising:
a spindle housing;
a spindle shaft configured to be rotatably supported inside the spindle housing;
a spindle mount having an insertion cavity into which the spindle housing is inserted along an axial direction of the spindle shaft;
a mount cover configured to cover the spindle mount; and
a temperature regulator provided inside the mount cover and configured to adjust a temperature inside the mount cover,
wherein a cooling passage configured to cool a gas supplied thereto is formed in the spindle mount, and the gas that has flowed through the cooling passage is supplied to a gas supply destination, wherein the cooling gas passage includes a first conduit section configured to communicate with an inlet for the gas, and a second conduit section formed wider than the first conduit section and configured to communicate between the first conduit section and an outlet for the gas.

Assignees

• Fanuc Corp

Inventors

• Murota Masahiro

Classifications

• B23Q11/0883

  for spindles, e.g. for their bearings or casings · CPC title

• B23Q11/141 Primary

  using a closed fluid circuit for cooling or heating · CPC title

• B23Q11/127 Primary

  for cooling motors or spindles · CPC title

• B23Q1/70 Primary

  Stationary or movable members for carrying working-spindles for attachment of tools or work {(B23Q1/01 takes precedence; designed to be moved by using particular mechanisms B23Q1/44)} · CPC title

• B23Q11/145

  using a jet of gas or cutting liquid · CPC title