Source: https://patents.google.com/patent/US8096737?oq=patent%3A+7360079
Timestamp: 2018-05-23 06:25:39
Document Index: 178022204

Matched Legal Cases: ['art 9', 'arts 11', 'arts 11', 'art 14', 'art 14', 'art 9']

US8096737B2 - Spindle device of machine tool - Google Patents
Spindle device of machine tool Download PDF
US8096737B2
US8096737B2 US12464637 US46463709A US8096737B2 US 8096737 B2 US8096737 B2 US 8096737B2 US 12464637 US12464637 US 12464637 US 46463709 A US46463709 A US 46463709A US 8096737 B2 US8096737 B2 US 8096737B2
US12464637
US20090279975A1 (en )
B23B2270/62—Use of suction
It is an object to provide a spindle device of a machine tool which has a simple structure and is capable of having high suction efficiency of cutting chips. A draw bar bringing engaging claws into engagement with a tool holder or releasing the engagement includes an engagement drive part moving the engaging claws to an engagement position with the tool holder; and a draw bar main body connected to the engagement drive part, and the engagement drive part is inserted into the draw bar main body to be detachably connected to an inner surface of the draw bar main body.
The present invention was made in view of the aforesaid conventional problems, and has an object to provide a spindle device of a machine tool which has a simple structure and allows automatic change of tools, whose spindle does not have a large inside diameter, and which is capable of having high suction efficiency of cutting chips.
FIG. 1 is a side sectional view of a spindle device according to one embodiment of the present invention;
Hereinafter, an embodiment of the present invention will be described based on the accompanying drawings. FIG. 1 to FIG. 8 are views to explain a spindle device of a machine tool according to one embodiment of the present invention.
A large number of coned disc springs 15 are interposed between the draw bar main body 10 and the through hole 3 a of the spindle 3. 15 a denotes collar members restricting an axial position of the coned disc springs 15. The coned disc springs 15 bias the draw bar 7 in a clamping direction (right direction in FIG. 1). When the engagement drive part 9 is moved in the clamping direction by the biasing force, the cam 9 a causes the claw parts 11 b to open and as a result, the claw parts 11 b are engaged with the engaging step 14 a, so that a tapered part 14 b of the holder main body 14 is firmly fitted in the tapered hole 3 b.
The drive mechanism 8 is structured such that a piston 18 d is inserted in a cylinder hole 18 c formed by a casing 18 a, which is clamped and fixed to a rear end portion of the spindle head 2 by bolts 8 a, and a cover member 18 b. When an oil pressure is supplied to an oil chamber b, the piston 18 d moves leftward in FIG. 1 to move the draw bar 7 in the unclamping direction (left direction in FIG. 1) via a pressure plate 24 against the biasing force of the coned disc springs 15, thereby releasing the engagement of the tapered part 14 b of the holder main body 14 and the tapered hole 3 b.
Further, a coupling pipe 17 is coaxially inserted in the cam 9 a of the engagement drive part 9, and the coupling pipe 17 is fixed in the holder main body 14 by a nut member 17 a.
Further, a rear end 10 b of the draw bar main body 10 is inserted in a front end 16 a of an inner pipe 16 of the drive mechanism 8. The inner pipe 16 is inserted in the cover member 18 b and also fixed to the cover member 18 b.
Between the inner pipe 16 and the rear end 10 b of the draw bar main body 10, a seal mechanism 21 is provided to prevent outside air from being sucked into the inner pipe 16. The seal mechanism 21 includes: a carbon seal ring 22 slidably in contact with an outer peripheral surface of the rear end 10 b of the draw bar main body 10; a pressure ring 23 made of an elastic member and bringing the seal ring 22 into pressure contact with a step 16 c of the inner pipe 16 via a spacer 23 a; and a snap ring 24 restricting an axial position of the pressure ring 23.
said seal mechanism includes an elastic member biasing the seal member in a direction towards the inner pipe so as to bring the seal member into pressure contact with a step of said inner pipe.
US12464637 2008-05-12 2009-05-12 Spindle device of machine tool Active 2030-07-10 US8096737B2 (en)
JPJP2008-125025 2008-05-12
JP2008-125025 2008-05-12
JP2008125025A JP5416364B2 (en) 2008-05-12 2008-05-12 Machine tool spindle device
US20090279975A1 true US20090279975A1 (en) 2009-11-12
US8096737B2 true US8096737B2 (en) 2012-01-17
ID=41180643
US12464637 Active 2030-07-10 US8096737B2 (en) 2008-05-12 2009-05-12 Spindle device of machine tool
US (1) US8096737B2 (en)
JP (1) JP5416364B2 (en)
CN (1) CN101579749B (en)
DE (1) DE102009020236A1 (en)
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JP2000061715A (en) * 1998-08-19 2000-02-29 Yamazaki Mazak Corp Tool clamping and unclamping device for main spindle
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Machine Translation of EP 1844897, which EP '897 was published Oct. 17, 2007. *
US8382405B2 (en) * 2007-11-22 2013-02-26 Mori Seiki Co., Ltd. Spindle device for machine tool
DE102009020236A1 (en) 2009-11-19 application
CN101579749B (en) 2013-01-30 grant
US20090279975A1 (en) 2009-11-12 application
CN101579749A (en) 2009-11-18 application
JP5416364B2 (en) 2014-02-12 grant
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Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:TADA, KEIGO;HAYASHI, TOMOHIKO;REEL/FRAME:023127/0248;SIGNING DATES FROM 20090707 TO 20090713
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:TADA, KEIGO;HAYASHI, TOMOHIKO;SIGNING DATES FROM 20090707 TO 20090713;REEL/FRAME:023127/0248