Title:
ELECTRIC SPINDLE AND MACHINE TOOL
Document Type and Number:
WIPO Patent Application WO/2022/170684
Kind Code:
A1
Abstract:
An electric spindle and a machine tool, comprising: a machine body assembly (1), provided with an air inlet (11) and a stator (12); a spindle core assembly (2), supported on the machine body assembly (1) by means of an upper bearing assembly (4) and a lower bearing assembly (5), the spindle core assembly (2) comprising a spindle core (21), a rotor (22), a pull rod assembly (24), and a chuck (23); and a push rod (3), extending into a spindle core inner hole from the upper end of the spindle core (21); the upper bearing assembly (4) comprises an upper bearing seat (41), an upper bearing (42), and a bearing pre-tensioning component (43), a closed inner cavity (44) being defined inside the upper bearing seat (41), the spindle core inner hole being in communication with the inner cavity (44), the upper bearing (42) and the bearing pre-tensioning component (43) being arranged in the inner cavity (44), the bearing pre-tensioning component (43) being supported between the upper bearing (42) and the upper bearing seat (41), the upper bearing seat (41) being provided with a piston chamber (46), the piston chamber (46) being in communication with the air inlet (11), a floating component (47) being disposed in the piston chamber (46), the floating component (47) abutting the bearing pre-tensioning component (43), and the spindle core inner hole and/or the pull rod assembly (24) and/or the push rod (3) being provided with a helical structure, in order to discharge the air in the inner cavity (44) outside via the spindle core inner hole after the spindle core assembly (2) is rotated.
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Inventors:
ZHANG HANQIAN (CN)
WU XI (CN)
ZHANG WEIJIANG (CN)
HUANG SUNKE (CN)
CHENG ZHENTAO (CN)
TANG XIUQING (CN)
WU XI (CN)
ZHANG WEIJIANG (CN)
HUANG SUNKE (CN)
CHENG ZHENTAO (CN)
TANG XIUQING (CN)
Application Number:
PCT/CN2021/092493
Publication Date:
August 18, 2022
Filing Date:
May 08, 2021
Export Citation:
Assignee:
GUANGZHOU HAOZHI IND CO LTD (CN)
International Classes:
B23B19/02; B23Q3/12; B23Q11/10
Foreign References:
| CN107116235A | 2017-09-01 | |||
| CN210731003U | 2020-06-12 | |||
| CN205798457U | 2016-12-14 | |||
| KR20190068797A | 2019-06-19 | |||
| KR20130066764A | 2013-06-21 |
Attorney, Agent or Firm:
JIAQUAN IP LAW (CN)
Download PDF:
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