JPH01173527U - - Google Patents
Info
- Publication number
- JPH01173527U JPH01173527U JP7132188U JP7132188U JPH01173527U JP H01173527 U JPH01173527 U JP H01173527U JP 7132188 U JP7132188 U JP 7132188U JP 7132188 U JP7132188 U JP 7132188U JP H01173527 U JPH01173527 U JP H01173527U
- Authority
- JP
- Japan
- Prior art keywords
- sleeve
- radial bearing
- bearing surface
- bearing device
- air vent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000314 lubricant Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Sliding-Contact Bearings (AREA)
Description
第１図はこの考案をレーザビーム偏向用回転ユ
ニツトに適用した実施例を示す縦断側面図、第２
図は第１図の軸受装置の要部拡大図、第３図は第
２図の軸受装置の組付け終了直後における潤滑剤
の残留状態を示す図、第４図ａおよび第４図ｂは
、それぞれ従来の軸受装置における潤滑剤の残留
状態を示す縦断面図である。
図中、１０は軸体、１１ａ，１１ｂは動圧発生
用のみぞ、１２ａ，１２ｂはラジアル受面、２０
はスリーブ、２２ａ，２２ｂはラジアル軸受面、
２４は逃げ部、２５ａ，２５ｂは空気抜き穴であ
る。
Fig. 1 is a vertical side view showing an embodiment in which this invention is applied to a rotating unit for deflecting a laser beam;
The figure is an enlarged view of the main parts of the bearing device in FIG. 1, FIG. 3 is a diagram showing the residual state of lubricant immediately after the bearing device in FIG. 2 has been assembled, and FIGS. 4a and 4b are FIG. 3 is a vertical cross-sectional view showing a residual state of lubricant in a conventional bearing device. In the figure, 10 is a shaft body, 11a and 11b are grooves for generating dynamic pressure, 12a and 12b are radial bearing surfaces, and 20
is a sleeve, 22a and 22b are radial bearing surfaces,
24 is a relief part, and 25a, 25b are air vent holes.
Claims (1)
体とを備え、スリーブの内径面には軸方向に離れ
た２個所に設けられたラジアル軸受面と、２個所
のラジアル軸受面の間の個所に設けられたラジア
ル軸受面よりも大径の逃げ部とを有し、逃げ部に
はスリーブの外面に通ずる空気抜き穴が開口して
設けられ、軸体の外径面にはスリーブのラジアル
軸受面に対向して設けられたラジアル受面を有し
、ラジアル軸受面とラジアル受面との少なくとも
一方に動圧発生用のみぞが設けられた軸受装置に
おいて、前記スリーブの空気抜き穴が逃げ部の軸
方向の少なくとも上端部と下端部との２個所に設
けられていることを特徴とする軸受装置。 It comprises a sleeve and a shaft fitted to the inner diameter surface of the sleeve, radial bearing surfaces provided on the inner diameter surface of the sleeve at two locations separated in the axial direction, and a location between the two radial bearing surfaces. The relief part has a larger diameter than the radial bearing surface provided in the sleeve, and the relief part is provided with an air vent hole that communicates with the outer surface of the sleeve. In a bearing device having a radial bearing surface provided opposite to the radial bearing surface, and a groove for generating dynamic pressure provided in at least one of the radial bearing surface and the radial bearing surface, the air vent hole of the sleeve is located opposite to the shaft of the relief portion. A bearing device characterized in that the bearing device is provided at at least two locations, an upper end portion and a lower end portion in the direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7132188U JPH01173527U (en) | 1988-05-30 | 1988-05-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7132188U JPH01173527U (en) | 1988-05-30 | 1988-05-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01173527U true JPH01173527U (en) | 1989-12-08 |
Family
ID=31296530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7132188U Pending JPH01173527U (en) | 1988-05-30 | 1988-05-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01173527U (en) |
-
1988
- 1988-05-30 JP JP7132188U patent/JPH01173527U/ja active Pending