JPH0276313U - - Google Patents
Info
- Publication number
- JPH0276313U JPH0276313U JP15626788U JP15626788U JPH0276313U JP H0276313 U JPH0276313 U JP H0276313U JP 15626788 U JP15626788 U JP 15626788U JP 15626788 U JP15626788 U JP 15626788U JP H0276313 U JPH0276313 U JP H0276313U
- Authority
- JP
- Japan
- Prior art keywords
- drum device
- vtr
- dynamic damper
- rotating shaft
- drum
- 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
- 238000000465 moulding Methods 0.000 claims 2
- 230000002093 peripheral effect Effects 0.000 claims 2
Description
第１図はこの考案の実施例に係るＶＴＲのドラ
ム装置の一部切欠正面図、第２図はダイナミツク
ダンパーの一部切欠平面図、第３図はダイナミツ
クダンパーの他の実施例を示す一部切欠平面図、
第４図は第３図Ａ―Ａ断面図、第５図は従来のド
ラム装置を示す一部切欠正面図である。
１……固定ドラム、２……回転シヤフト、３…
…回転ドラム、４……モータのステータ、５……
モータのロータ、６……ダイナミツクダンパー、
６４……弾性体円盤、６５……剛体フランジ部、
６４１……中央孔、２１……溝、６５１……切欠
、６５２……小孔。
Fig. 1 is a partially cutaway front view of a drum device for a VTR according to an embodiment of this invention, Fig. 2 is a partially cutaway plan view of a dynamic damper, and Fig. 3 is another embodiment of the dynamic damper. Partially cutaway plan view,
FIG. 4 is a sectional view taken along the line AA in FIG. 3, and FIG. 5 is a partially cutaway front view showing a conventional drum device. 1... Fixed drum, 2... Rotating shaft, 3...
...Rotating drum, 4...Motor stator, 5...
Motor rotor, 6...dynamic damper,
64...Elastic disk, 65...Rigid flange portion,
641...Central hole, 21...Groove, 651...Notch, 652...Small hole.
Claims (1)
ヤフトの一端側に回転ドラムが取付けられ、前記
回転シヤフトの他端側にモータのロータが取付け
られてなるＶＴＲのドラム装置において、前記モ
ータのロータに隣接するように前記回転シヤフト
の他端側先端に圧入嵌合する弾性体円盤により前
記回転シヤフトに固定されるねじり振動吸収用の
ダイナミツクダンパーを設けたことを特徴とする
ＶＴＲのドラム装置。 (2) ダイナミツクダンパーが回転シヤフトの先
端を圧入嵌合する中央孔を有した弾性体円盤と、
この円盤の外周に同心円状に固定されたイナーシ
ヤを持つ剛体フランジ部からなることを特徴とす
る請求項１記載のＶＴＲのドラム装置。 (3) ダイナミツクダンパーの剛体フランジ部は
、その内周縁に弾性体円盤の材料が成形時に侵入
係合する切欠部を有したことを特徴とする請求項
２記載のＶＴＲのドラム装置。 (4) ダイナミツクダンパーの剛体フランジ部の
内周縁付近に弾性体円盤の材料が成形時に侵入係
合する小孔を適宜設けてなることを特徴とする請
求項２記載のＶＴＲのドラム装置。 (5) 弾性体円盤の中央孔に圧入嵌合したとき、
前記中央孔の内壁がくい込む溝を回転シヤフトの
先端部外周に形成したことを特徴とする請求項(2
)記載のＶＴＲのドラム装置。[Claims for Utility Model Registration] (1) A VTR comprising a rotating shaft whose intermediate portion is supported by a fixed drum, a rotating drum attached to one end side, and a motor rotor attached to the other end of the rotating shaft. In the drum device, a dynamic damper for absorbing torsional vibrations is provided adjacent to the rotor of the motor and fixed to the rotary shaft by an elastic disc press-fitted to the other end of the rotary shaft. Characteristic VTR drum device. (2) an elastic disk having a central hole into which the dynamic damper press-fits the tip of the rotating shaft;
2. The drum device for a VTR according to claim 1, further comprising a rigid flange portion having an inertia fixed concentrically to the outer periphery of the disk. (3) The drum device for a VTR according to claim 2, wherein the rigid flange portion of the dynamic damper has a cutout portion on its inner peripheral edge into which the material of the elastic disk enters and engages during molding. (4) A drum device for a VTR according to claim 2, wherein a small hole is appropriately provided near the inner peripheral edge of the rigid flange portion of the dynamic damper, into which the material of the elastic disk enters and engages during molding. (5) When press-fitted into the center hole of the elastic disk,
Claim (2) characterized in that a groove into which the inner wall of the central hole fits is formed on the outer periphery of the tip end of the rotating shaft.
) The drum device of the VTR described in ).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15626788U JPH0276313U (en) | 1988-11-30 | 1988-11-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15626788U JPH0276313U (en) | 1988-11-30 | 1988-11-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0276313U true JPH0276313U (en) | 1990-06-12 |
Family
ID=31434657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15626788U Pending JPH0276313U (en) | 1988-11-30 | 1988-11-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0276313U (en) |
-
1988
- 1988-11-30 JP JP15626788U patent/JPH0276313U/ja active Pending
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