Title:
工作機械用主軸バランサ
Document Type and Number:
Japanese Patent JP3993974
Kind Code:
B2
Abstract:
The object of the present invention is to provide a main shaft balancing device for a machine tool, in which a gas spring is used in order to have reliable and effective reduction of the load on a vertical displacement means which raises and lowers a main shaft unit. A further object is to improve the seal and lubrication of this gas spring. A gas spring (31), comprising a cylinder body (32) filled with compressed gas (G) and a rod (50) that passes through a rod side end wall member (40) of the cylinder body (32), is provided upright. By supporting a main shaft unit (10) with the gas spring (31), the load on a vertical displacement mechanism is reduced. A pair of upper and lower ring-shaped seal members (42, 43), which seal between the rod end wall member (40) and the rod (50), are provided inside the rod end wall member (40). Ring-shaped oil filling chambers (44, 45) are formed in between the ring-shaped seal members (42, 43) and between the rod end wall member (40) and the rod (50). An oil filling mechanism (60) fills the oil filling chambers (44, 45) with lubrication oil L.
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Inventors:
Seiji Kimura
Application Number:
JP2000281303A
Publication Date:
October 17, 2007
Filing Date:
September 18, 2000
Export Citation:
Assignee:
PASCAL ENGINEERING CORPORATION
International Classes:
B23Q1/00; B23Q11/00; B23Q1/72; F16F9/00; F16F9/02; F16F9/32; F16F9/36; F16F15/023
Domestic Patent References:
| JP10118875A | ||||
| JP2000153418A | ||||
| JP63121865U | ||||
| JP56072945U | ||||
| JP7001346U | ||||
| JP5064550U | ||||
| JP10054435A |
Foreign References:
| US2572952 | ||||
| US5305854 |
Attorney, Agent or Firm:
Toshio Okamura