JPS6150207A - Cylinder device for fluid bearing - Google Patents

Cylinder device for fluid bearing

Info

Publication number
JPS6150207A
JPS6150207A JP59172273A JP17227384A JPS6150207A JP S6150207 A JPS6150207 A JP S6150207A JP 59172273 A JP59172273 A JP 59172273A JP 17227384 A JP17227384 A JP 17227384A JP S6150207 A JPS6150207 A JP S6150207A
Authority
JP
Japan
Prior art keywords
parts
cylinder device
shaft
sleeve
group
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.)
Granted
Application number
JP59172273A
Other languages
Japanese (ja)
Other versions
JPH0630131B2 (en
Inventor
Hiroshi Inoue
洋 井上
Minoru Koda
香田　稔
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP59172273A priority Critical patent/JPH0630131B2/en
Publication of JPS6150207A publication Critical patent/JPS6150207A/en
Publication of JPH0630131B2 publication Critical patent/JPH0630131B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/10—Construction relative to lubrication
    • F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
    • F16C33/106—Details of distribution or circulation inside the bearings, e.g. details of the bearing surfaces to affect flow or pressure of the liquid
    • F16C33/107—Grooves for generating pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/02—Sliding-contact bearings for exclusively rotary movement for radial load only
    • F16C17/026—Sliding-contact bearings for exclusively rotary movement for radial load only with helical grooves in the bearing surface to generate hydrodynamic pressure, e.g. herringbone grooves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2370/00—Apparatus relating to physics, e.g. instruments
    • F16C2370/12—Hard disk drives or the like

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Sliding-Contact Bearings (AREA)

Abstract

PURPOSE:To prevent stay of foreign matters or wear powder and to maintain the normal revolutions of a cylinder device for fluid bearing, by providing a deformed herringbone type group where the middle folded parts of each wedge- shaped group are connected to each other via the recess parts in the circumferential direction at the fixed side of a shaft or a sleeve. CONSTITUTION:The middle folded parts 13 of each wedge-shaped group 13 are set zigzag on the circumference of a circle with mutual shifts given toward the core of a fixed shaft 12 at two areas on a vertical outer circumference to the axial core. At the same time, the parts 13a are connected to each other via the recess parts 13b in the circumferential direction. Thus a deformed herringbone type group 14 is obtained. When a rotary part including a sleeve is revolved, a cylinder device can keep the normal revolutions with centripetalism secured by a pumping function. Then the pressure has no peak since the parts 13a are connected via the parts 13b. In addition, the flat maximum pressure generating parts 18 are decentralized since the parts 13b are set zigzag. As a result, the foreign matters and wear powder are moved toward a side of low pressure and ejected. This prevents a seisure of the cylinder device for fluid bearing.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、ビデオテープレコーダ等に用いられる流体軸
受シリンダ装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a fluid bearing cylinder device used in video tape recorders and the like.

従来例の構成とその問題点 第３図は従来の流体軸受シリンダ装置の断面図、第４図
（ａ）は要部の拡大図、第４図（ｂ）は第４図（ａ）の
Ｃ−Ｃ部分における圧力分布図である。Structure of conventional example and its problems Figure 3 is a sectional view of a conventional hydrodynamic bearing cylinder device, Figure 4 (a) is an enlarged view of the main parts, and Figure 4 (b) is C of Figure 4 (a). - It is a pressure distribution map in the C part.

第３図において、（１）は磁気テープを案内する固定シ
リンダ、（２）は固定シリンダ（１）の中心部に同軸的
に圧入固定される固定軸で、該軸（２）の軸心方向上下
の外周面２箇所に各グループ（３）の中間折曲部（３ａ
）が同一円周上に配置されたヘリングボーン型グループ
（４）が設けられている。（５）は固定軸（２）と同軸
的に回転可能で、ヘリングボーン型グループ（４）に対
向する位置に軸受内面（６）を有するスリーブ、（７）
はヘリングボーン型グループ（４）と軸受内面（６）と
の微小隙間に介在される潤滑剤である。In Figure 3, (1) is a fixed cylinder that guides the magnetic tape, and (2) is a fixed shaft that is coaxially press-fitted into the center of the fixed cylinder (1), and the axial direction of the shaft (2) is There are intermediate bends (3a
) are arranged on the same circumference (4). (5) is a sleeve that is rotatable coaxially with the fixed shaft (2) and has a bearing inner surface (6) at a position facing the herringbone group (4); (7)
is a lubricant interposed in the minute gap between the herringbone group (4) and the inner surface of the bearing (6).

以上のように構成された流体軸受シリンダ装置について
その動作を以下に説明する。この流体軸受シリンダ装置
のスリーブ（５）を含む回転部が回転すると、ヘリング
ボーン型グループ（４）と軸受内面（６）と潤滑剤（７
）によって構成されるラジアル軸受のポンピング作用に
より求心性が保たれ正常な回転を維持する。The operation of the hydrodynamic bearing cylinder device configured as described above will be described below. When the rotating part including the sleeve (5) of this hydrodynamic bearing cylinder device rotates, the herringbone group (4), the inner surface of the bearing (6) and the lubricant (7) rotate.
) The pumping action of the radial bearings maintains the centripetal nature and maintains normal rotation.

しかしながら、前記のような構成では、ヘリングボーン
型グループ（４）の個々のグループ（３）の中間折曲部
（３ａ）は加工的限度から微視的には鋭角ではなく丸み
をおびる。その結果、第２図に示すように全体の圧力分
布は最大圧力発生部（８）がほぼ平坦になる。このため
、ヘリングボーン型グループ（４）とスリーブ（５）の
軸受内面（６）と潤滑剤（７）とによって構成される軸
受部に初期から含まれている異物や回転の起動・停止時
に発生する摩耗粉がこの平坦な最大圧力発生部（８）に
存在すると、圧力勾配が小さいために他へ移動すること
なく、この最大圧力発生部（８）の円周上を回転し、こ
の現象が進行すると潤滑剤（７）を軸受部外へ追い出し
、堆積してついには焼き付きを起こして回転不可能にな
るという欠点を有していた。However, in the above configuration, the intermediate bent portions (3a) of the individual groups (3) of the herringbone type groups (4) are microscopically rounded rather than acute due to processing limitations. As a result, as shown in FIG. 2, the entire pressure distribution becomes almost flat at the maximum pressure generating portion (8). For this reason, foreign matter that is initially contained in the bearing part, which is composed of the herringbone group (4), the inner surface of the bearing (6) of the sleeve (5), and the lubricant (7), and the occurrence of foreign matter when starting or stopping rotation. If wear debris exists in this flat maximum pressure generating part (8), it will rotate on the circumference of this maximum pressure generating part (8) without moving elsewhere due to the small pressure gradient, and this phenomenon will occur. As it progresses, the lubricant (7) is forced out of the bearing part and accumulates, eventually causing seizing and rendering it impossible to rotate.

発明の目的 本発明は上記従来の欠点を解消するためになされたもの
で、軸受部の異物や摩耗粉の堆積を防止して正常な回転
を維持することを可能にする流体軸受シリンダ装置を提
供することを目的とするものである。OBJECTS OF THE INVENTION The present invention has been made to eliminate the above-mentioned conventional drawbacks, and provides a hydrodynamic bearing cylinder device that prevents the accumulation of foreign matter and abrasion powder on the bearing part and maintains normal rotation. The purpose is to

発明の構成 本発明は、軸と、前記軸と同軸的に設けられたスリーブ
と、前記軸と前記スリーブの間の微小隙間に介在される
潤滑剤より成り、前記軸又は前記スリーブのどちらか一
方に定められた固定側に、くさび状の各グループの中間
折曲部を周方向の凹部で接続した変形ヘリングボーン型
グループを設けたものであり、異物や摩耗粉の堆積を防
止し。Structure of the Invention The present invention comprises a shaft, a sleeve provided coaxially with the shaft, and a lubricant interposed in a minute gap between the shaft and the sleeve, and the lubricant is interposed in a minute gap between the shaft and the sleeve. A modified herringbone type group is provided on the fixed side defined by the above, in which the intermediate bent portions of each wedge-shaped group are connected by a circumferential recess, which prevents the accumulation of foreign matter and abrasion powder.

正常な回転を維持できるものである。It can maintain normal rotation.

実施例の説明 以下、本発明の一実施例を図面に基づいて説明する。第
１図は本発明に係る流体軸受シリンダ装置の要部を示し
、第１図（ａ）は軸の外周面に設けた変形ヘリングボー
ン型グループの平面図、第１図（ｂ）は第１図（ａ）の
Ａ−Ａ部分における圧力分布図である。第２図は本発明
の他の実施例を示し。DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows the main parts of the hydrodynamic bearing cylinder device according to the present invention, FIG. 1(a) is a plan view of a modified herringbone type group provided on the outer peripheral surface of the shaft, and FIG. It is a pressure distribution diagram in the AA part of figure (a). FIG. 2 shows another embodiment of the invention.

第２図（ａ）は軸の外周面に設けた変形ヘリングボーン
型グループの平面図、第２図（ｂ）は第２図（ａ）にお
けるＢ−Ｂ部分における圧力分布図である。FIG. 2(a) is a plan view of a modified herringbone type group provided on the outer circumferential surface of the shaft, and FIG. 2(b) is a pressure distribution diagram at the BB section in FIG. 2(a).

本発明に係る流体軸受シリンダ装置の基本的構成は、ヘ
リングボーン型グループ（４）以外は第３図に示したも
のと同一であり、同一部材については同一符号を用いた
。The basic configuration of the hydrodynamic bearing cylinder device according to the present invention is the same as that shown in FIG. 3 except for the herringbone type group (4), and the same symbols are used for the same members.

第１図と第３図において、（１２）は固定シリンダ（１
）の中心部に同軸状に圧入固定される固定軸で、該固定
軸（１２）の軸心方向上下の外周面２箇所にくさび状の
各グループ（１３）の中間折曲部（１３ａ）が軸心方向
に交互にズラして円周上に千鳥状に配置されるとともに
、該中間折曲部（１３ａ）が周方向の凹部（１３ｂ）で
接続された変形ヘリングボーン型グループ（１４）が設
けられており、この変形ヘリングボーン型グループ（１
４）と、該グループ（１４）に対向するスリーブ（５）
の軸受内面（６）と、これらの間の微小隙間に介在され
る潤滑剤（７）とによって軸受部が構成されている。In Figures 1 and 3, (12) is the fixed cylinder (1
) is a fixed shaft coaxially press-fitted into the center of the fixed shaft (12), and wedge-shaped intermediate bent portions (13a) of each group (13) are formed at two locations on the upper and lower outer circumferential surfaces of the fixed shaft (12) in the axial direction. Modified herringbone type groups (14) are arranged in a staggered manner on the circumference while being alternately shifted in the axial direction, and the intermediate bent portions (13a) are connected by circumferential recesses (13b). This modified herringbone group (1
4) and a sleeve (5) facing the group (14).
The bearing portion is constituted by the inner surface of the bearing (6) and the lubricant (7) interposed in the minute gap between them.

以上のように構成された流体軸受シリンダ装置について
以下にその動作を説明する。スリーブを含む回転部が回
転すると、ボンピング作用により求心性を保つことは、
この変形ヘリングボーン型グループ（１４）でも成り立
ち、正常な回転を維持する。そして、中間折曲部（１３
ａ）が凹部（１３ｂ）で接続されているため圧力はピー
クを持たなくなり、かつ凹部（１３ｂ）が千、１状に配
設されていることによって、平坦な最大圧力発生部（１
８）が分散され、異物や摩耗粉は圧力の低い方へ移動し
、堆積せずに焼き付きを防止している。The operation of the hydrodynamic bearing cylinder device configured as described above will be described below. When the rotating part including the sleeve rotates, it maintains its centripetal property due to the pumping action.
This also holds true for this modified herringbone type group (14) and maintains normal rotation. Then, the intermediate bending part (13
a) are connected by the recesses (13b), the pressure does not have a peak, and since the recesses (13b) are arranged in a 1,000-1 pattern, a flat maximum pressure generating part (1
8) is dispersed, and foreign matter and wear particles move to the side with lower pressure, preventing them from accumulating and seizing.

第２図は本発明の他の実施例を示し、固定シリンダの中
心部に同軸状に圧入固定される固定軸（２２）の軸心方
向上下の外周面２箇所に設けられる変形ヘリングボーン
型グループ（２４）は、そのくさび状の各グループ（２
３）の中間折曲部（２３ａ）が周方向の凹部（２３ｂ）
で接続され、かつ該凹部（２３ｂ）が第２図（ａ）の一
点鎖線で示されるように円周上でｓｉｎカーブ状に配に
されるように構成されている。FIG. 2 shows another embodiment of the present invention, in which modified herringbone type groups are provided at two locations on the upper and lower outer circumferential surfaces of the fixed shaft (22) coaxially press-fitted into the center of the fixed cylinder. (24) represents each wedge-shaped group (2
3) The intermediate bent portion (23a) is a circumferential recess (23b)
The concave portions (23b) are arranged in a sin curve shape on the circumference, as shown by the dashed line in FIG. 2(a).

以上のように構成された流体軸受シリンダ装置について
以下にその動作について説明する。スリーブを含む回転
部が回転するとポンピング作用により求心性を保つこと
は、この変形ヘリングボーン型グルニブ（２４）でも成
り立ち、正常な回転を維持する。そして、中間折曲部（
２３ａ）が凹部（２３ｂ）で接続されているため、圧力
はピークを持たなくなり、かつ凹部（２３ｂ）がｓｉｎ
カーブ状に配置されていることによって、平坦な最大圧
力発生部（２８）が分散され、異物や摩耗粉は圧力の低
い方へ移動し、堆積せずに焼き付きを防止している。The operation of the hydrodynamic bearing cylinder device configured as described above will be described below. When the rotating part including the sleeve rotates, the centripetal property is maintained by the pumping action, which also holds true for this modified herringbone type glu nib (24), and normal rotation is maintained. Then, the middle bent part (
23a) are connected by the recess (23b), the pressure no longer has a peak, and the recess (23b) is sin
Due to the curved arrangement, the flat maximum pressure generating portion (28) is dispersed, and foreign matter and wear particles move to the lower pressure side, preventing them from accumulating and seizing.

発明の詳細 な説明したように、本発明によれば、回転の起動・停止
により発生する摩耗粉や初期から存在する異物の堆積を
防止して焼き付きを防ぐことができ、これにより、流体
軸受シリンダ装置の正常な回転が維持されるという効果
が得られる。As described in detail, according to the present invention, it is possible to prevent seizure by preventing the accumulation of wear particles generated by starting and stopping rotation and foreign matter that is present from the beginning. The effect is that the normal rotation of the device is maintained.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明に係る流体軸受シリンダ装置の要部を示
し、第１図（ａ）は軸の外周面に設けた変形ヘリングボ
ーン型グループの平面図、第１図（ｂ）は第１図（ａ）
のＡ−Ａ部分における圧力分布図、第２図は本発明の他
の実施例を示し、第２図（ａ）は軸の外周面に設けた変
形ヘリングボーン型グループの平面図、第２図（ｂ）は
第２図（ａ）におけるＢ−Ｂ部分における圧力分布図、
第３図および第４図は従来の流体軸受シリンダ装置を示
し、第３図はその断面図、第４図（ａ）は要部の拡大図
、第４図（ｂ）は第４図（ａ）のＣ−Ｃ部分における圧
力分布図である。 （１２）　（２２）・・・軸、（１３）　（２３）・・
・グループ、　（１３ａ）（２３ａ）・・・中間折曲部
、　（１３ｂ）（２３ｂ）−・・凹部、（１４）　（２
４）・・・変形ヘリングボーン型グループ、（５）・・
・スリーブ、（７）・・・潤滑剤 代理人　　　森　　本　　義　　弘 」 一９（ 虐ν蜀ＳFIG. 1 shows the main parts of the hydrodynamic bearing cylinder device according to the present invention, FIG. 1(a) is a plan view of a modified herringbone type group provided on the outer peripheral surface of the shaft, and FIG. Diagram (a)
2 shows another embodiment of the present invention, and FIG. 2(a) is a plan view of a modified herringbone type group provided on the outer peripheral surface of the shaft. (b) is a pressure distribution diagram in the B-B section in Fig. 2 (a),
3 and 4 show a conventional hydrodynamic bearing cylinder device, FIG. 3 is a sectional view thereof, FIG. 4(a) is an enlarged view of the main part, and FIG. 4(b) is a ) is a pressure distribution diagram in the C-C section. (12) (22)...axis, (13) (23)...
・Group, (13a) (23a)...Intermediate bent part, (13b) (23b)-...Concave part, (14) (2
4)...Modified herringbone group, (5)...
・Sleeve, (7)...Lubricant agent Yoshihiro Morimoto" 19 (Shu S

Claims (1)

【特許請求の範囲】 １、軸と、前記軸と同軸的に設けられたスリーブと、前
記軸と前記スリーブの間の微小隙間に介在される潤滑剤
より成り、前記軸又は前記スリーブのどちらか一方に定
められた固定側に、くさび状の各グループの中間折曲部
を周方向の凹部で接続した変形ヘリングボーン型グルー
プを設けた流体軸受シリンダ装置。 ２、変形ヘリングボーン型グループは、その凹部が軸心
方向に交互にズラして円周上に千鳥状に配置されること
を特徴とする特許請求の範囲第１項記載の流体軸受シリ
ンダ装置。 ３、変形ヘリングボーン型グループは、その凹部が円周
上にｓｉｎカーブ状に配置されることを特徴とする特許
請求の範囲第１項記載の流体軸受シリンダ装置。[Claims] 1. Consisting of a shaft, a sleeve provided coaxially with the shaft, and a lubricant interposed in a minute gap between the shaft and the sleeve, either the shaft or the sleeve. A hydrodynamic bearing cylinder device in which a modified herringbone type group is provided on one fixed side, in which the intermediate bent portions of each wedge-shaped group are connected by a circumferential recess. 2. The hydrodynamic bearing cylinder device according to claim 1, wherein the modified herringbone type groups are arranged in a staggered manner on the circumference with their concave portions being alternately shifted in the axial direction. 3. The hydrodynamic bearing cylinder device according to claim 1, wherein the modified herringbone type group has a concave portion arranged in a sinusoidal curve shape on the circumference.
JP59172273A 1984-08-18 1984-08-18 Fluid bearing cylinder device Expired - Lifetime JPH0630131B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59172273A JPH0630131B2 (en) 1984-08-18 1984-08-18 Fluid bearing cylinder device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59172273A JPH0630131B2 (en) 1984-08-18 1984-08-18 Fluid bearing cylinder device

Publications (2)

Publication Number Publication Date
JPS6150207A true JPS6150207A (en) 1986-03-12
JPH0630131B2 JPH0630131B2 (en) 1994-04-20

Family

ID=15938852

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59172273A Expired - Lifetime JPH0630131B2 (en) 1984-08-18 1984-08-18 Fluid bearing cylinder device

Country Status (1)

Country Link
JP (1) JPH0630131B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01219909A (en) * 1988-02-29 1989-09-01 Hitachi Ltd Robot arm control method
JPH01279111A (en) * 1988-04-28 1989-11-09 Matsushita Electric Ind Co Ltd Fluid bearing device
EP0697534A3 (en) * 1994-07-22 1996-09-25 Quantum Corp A self-replenishing hydrodynamic bearing

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5917018A (en) * 1982-07-15 1984-01-28 Matsushita Electric Ind Co Ltd Fluid bearing device utilizing dynamic pressure type lubricating oil

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5917018A (en) * 1982-07-15 1984-01-28 Matsushita Electric Ind Co Ltd Fluid bearing device utilizing dynamic pressure type lubricating oil

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01219909A (en) * 1988-02-29 1989-09-01 Hitachi Ltd Robot arm control method
JPH01279111A (en) * 1988-04-28 1989-11-09 Matsushita Electric Ind Co Ltd Fluid bearing device
EP0697534A3 (en) * 1994-07-22 1996-09-25 Quantum Corp A self-replenishing hydrodynamic bearing

Also Published As

Publication number Publication date
JPH0630131B2 (en) 1994-04-20

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