IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0037211
(2002-01-04)
|
우선권정보 |
JP-0004149 (2001-01-11); JP-0269361 (2001-09-05) |
발명자
/ 주소 |
- Yamazaki, Tsunehiko
- Koike, Haruhiko
- Yamamoto, Noboru
|
출원인 / 주소 |
- Yamazaki Mazak Kabushiki Kaisha
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
4 |
초록
▼
A chuck unit for a machine tool is capable of holding a workpiece installed on a spindle by workpiece holding members that move in a radial direction with respect to an axial center. Workpiece holding rods are provided at the workpiece holding member and move radially. Screw operating portions are o
A chuck unit for a machine tool is capable of holding a workpiece installed on a spindle by workpiece holding members that move in a radial direction with respect to an axial center. Workpiece holding rods are provided at the workpiece holding member and move radially. Screw operating portions are operated by a rotating operation jig at an outer peripheral side of the chuck unit. A workpiece end face abutment moves and holds the workpiece in the axial direction.
대표청구항
▼
A chuck unit for a machine tool is capable of holding a workpiece installed on a spindle by workpiece holding members that move in a radial direction with respect to an axial center. Workpiece holding rods are provided at the workpiece holding member and move radially. Screw operating portions are o
A chuck unit for a machine tool is capable of holding a workpiece installed on a spindle by workpiece holding members that move in a radial direction with respect to an axial center. Workpiece holding rods are provided at the workpiece holding member and move radially. Screw operating portions are operated by a rotating operation jig at an outer peripheral side of the chuck unit. A workpiece end face abutment moves and holds the workpiece in the axial direction. ole, the elliptical opening and circular hole in each end portion of the adjusting segment being substantially longitudinally aligned with a corresponding notch of the brush segment. 5. The brush seal assembly of claim 4 wherein a one of the clamping block assemblies is disposed in each notch of the brush segment. 6. The brush seal assembly of claim 5 wherein the first portion of each adjustable bearing device comprises a threaded rod and the second portion and lock of each adjustable bearing device comprise a pair of jam nuts, the threaded rod extending radially from an inner end mounted to the clamping block through a first of the jam nuts, the associated circular hole of the bearing portion of the adjusting segment, and a second of the jam nuts. 7. The brush seal assembly of claim 6 wherein each clamping block has a radially outer edge and defines a threaded blind bore extending radially from the radially outer edge, the inner end of the threaded rod being mounted in blind bore. 8. The brush seal assembly of claim 1 further comprising an arcuate-shaped brush guard segment including a mounting portion adapted for clamping between the brush assembly and the seal housing and an extension portion extending radially inward over a portion of the brush to a radially inner end spaced a preselected distance from the yoke. 9. The brush seal assembly of claim 8 wherein the mounting portion of the brush guard segment defines at least one substantially circular hole extending longitudinally there through, the threaded shaft of the mounting bolt extending through the circular hole. 10. The brush seal assembly of claim 8 wherein the yoke is composed of a first material and the brush guard segment is composed of a second material, the second material being softer than the first material. 11. The brush seal assembly of claim 8 further comprising first and second arcuate-shaped seal ring segments disposed longitudinally on either side of the brush guard segment. 12. The brush seal assembly of claim 11 wherein each seal ring segment defines at least one substantially circular hole extending longitudinally there through, the threaded shaft of the mounting bolt extending through the circular hole. 13. A brush seal assembly for a coal pulverizer, the pulverizer having a mill housing, a bowl disposed within the mill housing, a drive disposed externally to the mill housing, and a yoke transmitting rotary motion from the drive to the bowl, the mill housing having a lower end portion forming a seal housing, the yoke extending longitudinally from an upper end portion connected to the bowl, through the seal housing to a lower end portion connected to the drive, the brush seal assembly comprising a plurality of assembly segments, each assembly segment comprising: an arcuate-shaped brush segment including a brush and a brush holder, the brush extending from a radially inner end to a radially outer end, the radially inner end being adapted for contacting the yoke, the brush holder having a radially outer mounting plate portion and a radially inner brush receptacle portion, the radially outer end of the brush being mounted in the brush receptacle portion, the mounting plate portion having a radially outer edge and defining a pair of notches extending radially inward from the radially outer edge; an arcuate-shaped adjusting segment including a radially extending mounting portion and an longitudinally extending bearing portion, the mounting portion of the adjusting segment being mounted to the mounting plate portion of the brush segment and defining a pair of elliptical openings extending longitudinally there through, each elliptical opening extending radially from an inner end to an outer end, the bearing portion defining a pair of substantially circular holes extending radially there through, each elliptical opening and circular hole being longitudinally aligned with a one of the notches of the brush segment; a pair of clamping block assemblies, a on e of the clamping block assemblies being disposed in each notch of the brush segment, each clamping block assembly including a clamping block, a threaded rod, and a pair of jam nuts, the clamping block defining a substantially circular opening extending longitudinally there through, the threaded rod extending radially from an inner end mounted to the clamping block through a first of the jam nuts, the associated circular hole of the bearing portion of the adjusting segment, and a second of the jam nuts; an arcuate-shaped brush guard segment including a mounting portion and an extension portion, the mounting portion defining a pair of substantially circular apertures extending longitudinally there through, the circular apertures being aligned with the elliptical openings of the brush segment, the extension portion extending radially inward over a portion of the brush to a radially inner end spaced a preselected distance from the yoke; first and second arcuate-shaped seal ring segments, each seal ring segment defining a pair of substantially circular holes extending longitudinally there through, the circular holes of each seal ring segment being aligned with the elliptical openings of the brush segment; and a pair of mounting bolts, each mounting bolt having a head and a threaded shaft extending longitudinally upward from the head to a distal end portion, the threaded shaft extending through the circular opening of a one of the clamping block assemblies, the associated elliptical opening of the adjusting segment, the associated circular hole of the first seal ring segment, the associated circular aperture of the brush guard segment, and the associated circular hole of the second seal ring segment, the distal end portion of the threaded shaft being adapted for threaded engagement with an opening of the seal housing.
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