JPH1019133A - Oil seal protective device for rotary machine - Google Patents

Oil seal protective device for rotary machine

Info

Publication number
JPH1019133A
JPH1019133A JP8191464A JP19146496A JPH1019133A JP H1019133 A JPH1019133 A JP H1019133A JP 8191464 A JP8191464 A JP 8191464A JP 19146496 A JP19146496 A JP 19146496A JP H1019133 A JPH1019133 A JP H1019133A
Authority
JP
Japan
Prior art keywords
lubricating oil
oil seal
oil
oil tank
flange
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
JP8191464A
Other languages
Japanese (ja)
Other versions
JP3871073B2 (en
Inventor
Toru Nakako
透 仲子
Koji Tsukuda
浩二 津久田
Katsunori Tsukamoto
克則 塚本
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.)
Yaskawa Electric Corp
Original Assignee
Yaskawa Electric Corp
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 Yaskawa Electric Corp filed Critical Yaskawa Electric Corp
Priority to JP19146496A priority Critical patent/JP3871073B2/en
Publication of JPH1019133A publication Critical patent/JPH1019133A/en
Application granted granted Critical
Publication of JP3871073B2 publication Critical patent/JP3871073B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Sealing With Elastic Sealing Lips (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide oil seal protective structure preventing grease and lubricating oil with abrasion powder mixed therein, from infiltrating into a lip face of an oil seal of a rotary shaft of a rotary machine. SOLUTION: A rotary machine has a vertically installed rotary shaft 30, a lubricating oil tank 50 and an oil seal 70 for sealing leakage of lubricating oil 60 from a through part of the rotary shaft 30 piercing the bottom part of the lubricating oil tank 50. In this case, a gas chamber 90 is provided between the lubricating oil tank 50 and the oil seal 70 so as to prevent abrasion powder, mixed in the lubricating oil 60, from infiltrating between the oil seal 70 and the rotary shaft 30.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は回転機械におけるオ
イルシール保護装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil seal protection device for a rotary machine.

【0002】[0002]

【従来の技術】従来の回転機械のオイルシール装置の構
造を図によって説明する。図2は産業用ロボットの旋回
機構を示す側断面図である。ただし、説明に不要な部分
は省略している。10は減速機であり、産業用ロボット
本体(図示せず)に固定されている。前記減速機10の
下部には、フランジ20が取り付けられている。前記フ
ランジ20の下部にはモータ(図示せず)が取り付けら
れている。30は前記モータの出力軸であり、前記フラ
ンジ20を貫通している。前記出力軸30には歯車40
が取り付けられている。歯車40は、前記減速機10の
入力歯車(図示せず)に噛合している。前記減速機10
と前記フランジ20は一体となって潤滑油槽50を形成
している。すなわち、減速機10は潤滑油槽50の胴部
であり、フランジ20は底板である。潤滑油槽50の内
部には潤滑油60が満たされている。前記フランジ20
の、前記出力軸30が貫通する開口の周囲の凹部にオイ
ルシール70が取り付けられ、リップ面70aが出力軸
30に密着して、前記潤滑油60の漏洩を封止してい
る。
2. Description of the Related Art The structure of a conventional oil seal device for a rotary machine will be described with reference to the drawings. FIG. 2 is a side sectional view showing a turning mechanism of the industrial robot. However, parts unnecessary for the description are omitted. Reference numeral 10 denotes a speed reducer, which is fixed to an industrial robot main body (not shown). A flange 20 is attached to a lower portion of the speed reducer 10. A motor (not shown) is mounted below the flange 20. Reference numeral 30 denotes an output shaft of the motor, which passes through the flange 20. The output shaft 30 has a gear 40
Is attached. The gear 40 meshes with an input gear (not shown) of the speed reducer 10. The speed reducer 10
And the flange 20 together form a lubricating oil tank 50. That is, the speed reducer 10 is a body of the lubricating oil tank 50, and the flange 20 is a bottom plate. The inside of the lubricating oil tank 50 is filled with the lubricating oil 60. The flange 20
An oil seal 70 is attached to a recess around the opening through which the output shaft 30 penetrates, and a lip surface 70 a is in close contact with the output shaft 30 to seal the leakage of the lubricating oil 60.

【0003】[0003]

【発明が解決しようとする課題】ところが、従来技術で
は、次のような問題があった。機械の運転にともなっ
て、減速機10の機構部が磨耗して、その磨耗粉が潤滑
油60の中に混入する。前記磨耗粉は重いので、潤滑油
60の中を降下してオイルシール70のリップ面70a
とモータの出力軸30の間に侵入する。そのためオイル
シール70の磨耗が促進されるので、オイルシール70
の寿命が短くなる。オイルシール自体は消耗部品であ
り、定期的に交換するものではあるが、交換作業には大
きな工数と長時間の機械の運転停止が必要であるので、
オイルシールの磨耗は機械の保守コストの上で大きな問
題になっている。そこで、本発明はオイルシールのリッ
プ面に、磨耗粉が混入したグリースや潤滑油が、侵入し
ないようなオイルシールの保護構造を提供することを目
的とする。
However, the prior art has the following problems. With the operation of the machine, the mechanism of the speed reducer 10 is worn, and the wear powder is mixed into the lubricating oil 60. Since the abrasion powder is heavy, it descends in the lubricating oil 60 and the lip surface 70 a of the oil seal 70.
Between the motor and the output shaft 30 of the motor. Therefore, the wear of the oil seal 70 is promoted, so that the oil seal 70
Life is shortened. The oil seal itself is a consumable part and must be replaced periodically.However, the replacement requires a large number of man-hours and a long machine shutdown.
The wear of the oil seal is a major problem in the maintenance cost of the machine. Accordingly, an object of the present invention is to provide an oil seal protection structure in which grease or lubricating oil mixed with abrasion powder does not enter the lip surface of the oil seal.

【0004】[0004]

【課題を解決するための手段】上記の問題を解決するた
めに、本発明は、潤滑油槽とオイルシールの間に気体室
を設け、気体室内部に空気又は他の気体を密封すること
としている。気体室内の気圧と潤滑油槽内の液圧が均衡
するので、潤滑油槽内の潤滑油は気体室内に侵入しな
い。従ってオイルシールのリップ面には磨耗粉は侵入し
ない。
In order to solve the above problems, the present invention provides a gas chamber between a lubricating oil tank and an oil seal, and seals air or other gas inside the gas chamber. . Since the air pressure in the gas chamber and the liquid pressure in the lubricating oil tank are balanced, the lubricating oil in the lubricating oil tank does not enter the gas chamber. Therefore, no abrasion powder enters the lip surface of the oil seal.

【0005】[0005]

【発明の実施の形態】図1は本発明の実施例を示す産業
用ロボットの旋回機構の側断面図である。ただし、説明
に不要な部分は省略している。10は減速機であり、産
業用ロボット本体(図示せず)に固定されている。前記
減速機10の下部には、フランジ20が取り付けられて
いる。前記フランジ20の下部にはモータ(図示せず)
が取り付けられている。30は前記モータの出力軸であ
り、前記フランジ20を貫通している。前記出力軸30
は垂直に配置されているが、垂直に近い角度であれば、
本発明は実施できる。前記出力軸30には、上から順に
歯車40、鍔状金物41、及びカラー42が取り付けら
れている。出力軸30は歯車40を介して、前記減速機
10の入力歯車(図示せず)に噛合している。前記減速
機10及び前記フランジ20は一体となって潤滑油槽5
0を形成している。すなわち、減速機10は潤滑油槽5
0の胴部であり、フランジ20は底板である。潤滑油槽
50の内部には潤滑油60が満たされている。前記フラ
ンジ20の、前記出力軸30が貫通する開口の凹部にオ
イルシール70が取り付けられている。オイルシール7
0のリップ面70aは前記カラー42に密着している。
オイルシール70とカラー42の間にはオイルシールの
リップ面70aの潤滑用のオイル80が満たされてい
る。
FIG. 1 is a side sectional view of a turning mechanism of an industrial robot showing an embodiment of the present invention. However, parts unnecessary for the description are omitted. Reference numeral 10 denotes a speed reducer, which is fixed to an industrial robot main body (not shown). A flange 20 is attached to a lower portion of the speed reducer 10. A motor (not shown) is provided below the flange 20.
Is attached. Reference numeral 30 denotes an output shaft of the motor, which passes through the flange 20. The output shaft 30
Are arranged vertically, but if the angle is nearly perpendicular,
The present invention can be implemented. The output shaft 30 is provided with a gear 40, a flanged metal member 41, and a collar 42 in order from the top. The output shaft 30 meshes with an input gear (not shown) of the speed reducer 10 via a gear 40. The speed reducer 10 and the flange 20 are integrally formed with the lubricating oil tank 5.
0 is formed. That is, the speed reducer 10 is
0, and the flange 20 is a bottom plate. The inside of the lubricating oil tank 50 is filled with the lubricating oil 60. An oil seal 70 is attached to a concave portion of the opening of the flange 20 through which the output shaft 30 passes. Oil seal 7
The zero lip surface 70a is in close contact with the collar 42.
The space between the oil seal 70 and the collar 42 is filled with oil 80 for lubricating the lip surface 70a of the oil seal.

【0006】前記フランジ20には堤防状の壁20aが
設けられ、オイルシール70を環状に取り囲んでいる。
前記鍔状金物41は、中心に出力軸30が貫通する穴が
開き、外縁部に垂れ壁41aが設けられている。前記歯
車40と鍔状金物41の接触面、及び鍔状金物41と前
記カラー42の接触面には液状ガスケット(図示せず)
を塗って気密を保っている。90は気体室である。気体
室90は、前記フランジ20、前記鍔状金物41、前記
カラー42、前記潤滑油60の液面、及び前記オイル8
0の液面で囲まれていて、内部に空気を密封している。
気体室90は次の手順で形成される。オイル80を注入
したうえで、旋回機構部を全て組み立てた後で、潤滑油
60を潤滑油槽50に静かに注入する。潤滑油60の液
面が上昇して、前記鍔状金物41の垂れ壁41aの下面
に達したとき、鍔状金物41の下部にあった空気が密封
される。すなわち気体室90が形成される。更に潤滑油
60の注入を続けると、液面は上昇し、気体室90の内
部の気圧が油槽50の液圧と均衡するまで、気体室内部
の空気が圧縮される。前記フランジ20の壁20aの高
さは圧力と容積の関係を考慮して決めているので、液面
が壁20aを越えることはない。従って潤滑油60がオ
イルシール70に侵入することはない。なお、潤滑油6
0を注入する前に潤滑油槽50内の空気を他の所望の気
体、例えば二酸化炭素、窒素などで置換すれば、気体室
90内に前記気体を封入できる。また、前記鍔状金物4
1は次のような構成でも良い。 (1)鍔状金物41を前記歯車40を一体にする。 (2)鍔状金物41と前記カラー42を一体にする。 (3)鍔状金物41と歯車40とカラー42を一体にす
る。 さらに、カラー42を省いて、リップ面70aを出力軸
30に接触させる構成も実施可能である。またなお、前
記潤滑油60と前記オイル80はグリース又は他の液体
潤滑剤であっても良いし、前記オイルシール70の仕様
によっては、オイル80は使用しなくても良い。
The flange 20 is provided with a bank-like wall 20a, which surrounds the oil seal 70 in a ring shape.
The flange-shaped metal member 41 has a hole at the center through which the output shaft 30 penetrates, and a hanging wall 41a provided at an outer edge portion. A liquid gasket (not shown) is provided on the contact surface between the gear 40 and the collar 41 and the contact surface between the collar 41 and the collar 42.
To keep the airtight. 90 is a gas chamber. The gas chamber 90 includes the flange 20, the flange-shaped metal member 41, the collar 42, the liquid surface of the lubricating oil 60, and the oil 8.
It is surrounded by a liquid level of 0, and seals air inside.
The gas chamber 90 is formed in the following procedure. After injecting the oil 80 and assembling all of the turning mechanism, the lubricating oil 60 is gently injected into the lubricating oil tank 50. When the liquid level of the lubricating oil 60 rises and reaches the lower surface of the hanging wall 41a of the flange-shaped metal member 41, the air below the flange-shaped metal member 41 is sealed. That is, the gas chamber 90 is formed. When the lubricating oil 60 is further injected, the liquid level rises, and the air inside the gas chamber is compressed until the pressure inside the gas chamber 90 is balanced with the liquid pressure in the oil tank 50. Since the height of the wall 20a of the flange 20 is determined in consideration of the relationship between pressure and volume, the liquid level does not exceed the wall 20a. Therefore, the lubricating oil 60 does not enter the oil seal 70. In addition, lubricating oil 6
If the air in the lubricating oil tank 50 is replaced with another desired gas, for example, carbon dioxide, nitrogen or the like before injecting 0, the gas can be sealed in the gas chamber 90. In addition, the collar-shaped hardware 4
1 may have the following configuration. (1) Integrate the collar 40 with the gear 40. (2) The collar 41 and the collar 42 are integrated. (3) The collar-shaped hardware 41, the gear 40 and the collar 42 are integrated. Further, a configuration in which the collar 42 is omitted and the lip surface 70a is in contact with the output shaft 30 is also possible. In addition, the lubricating oil 60 and the oil 80 may be grease or other liquid lubricant, or the oil 80 may not be used depending on the specification of the oil seal 70.

【0007】[0007]

【発明の効果】本発明によれば、次のような効果があ
る。 (1)磨耗粉等の混入した潤滑油がオイルシールに触れ
ることを防ぐので、オイルシールと回転軸の間に磨耗粉
が侵入することを防いで、オイルシールの寿命を延ば
す。 (2)オイルシールの寿命を延ばすので、オイルシール
交換のための機械の停止時間や作業工数を削減できる。 (3)構造が簡易であるので、製造が容易であり、信頼
性が高い。
According to the present invention, the following effects can be obtained. (1) Since the lubricating oil mixed with the abrasion powder and the like is prevented from touching the oil seal, it is possible to prevent the abrasion powder from entering between the oil seal and the rotating shaft, thereby extending the life of the oil seal. (2) The life of the oil seal is extended, so that the machine stop time and the number of work steps for replacing the oil seal can be reduced. (3) Since the structure is simple, manufacturing is easy and reliability is high.

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

【図1】本発明の実施例を示す産業用ロボットの旋回機
構の側断面図である。
FIG. 1 is a side sectional view of a turning mechanism of an industrial robot showing an embodiment of the present invention.

【図2】従来技術の実施例を示す産業用ロボットの旋回
機構の側断面図である。
FIG. 2 is a side sectional view of a turning mechanism of an industrial robot showing an embodiment of the prior art.

【符号の説明】[Explanation of symbols]

10:減速機 20:フランジ 20a:壁 30:出力軸 40:歯車 41:鍔状金物 41a:垂れ壁部 42:カラー 50:油槽 60:潤滑油 70:オイルシール 70a:リップ部 80:オイル 90:気体室 10: Reduction gear 20: Flange 20a: Wall 30: Output shaft 40: Gear 41: Flange-shaped hardware 41a: Hanging wall 42: Collar 50: Oil tank 60: Lubricating oil 70: Oil seal 70a: Lip 80: Oil 90: Gas chamber

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 垂直に設置された回転軸と、潤滑油槽を
持ち、前記回転軸が前記潤滑油槽の底部を貫通して、前
記回転軸の貫通部からの潤滑油の漏洩を封止するための
オイルシールを持つ回転機械において、前記潤滑油槽と
前記オイルシールの間に、内部の気圧と前記潤滑油槽の
内部の液圧を均衡させて、前記潤滑油槽内の潤滑油が前
記オイルシールに侵入することを阻止する気体室を設け
たことを特徴とするオイルシール保護装置。
1. A rotary shaft having a vertically installed rotating shaft and a lubricating oil tank, wherein the rotating shaft penetrates a bottom portion of the lubricating oil tank and seals leakage of lubricating oil from a penetrating portion of the rotating shaft. In a rotary machine having an oil seal, the internal pressure and the hydraulic pressure inside the lubricating oil tank are balanced between the lubricating oil tank and the oil seal, so that the lubricating oil in the lubricating oil tank enters the oil seal. An oil seal protection device, comprising a gas chamber for preventing the oil sealing.
【請求項2】 前記気体室を、前記回転軸に取り付けた
鍔状金物と、前記潤滑油槽の底板とで構成したことを特
徴とする請求項1記載の回転機械のオイルシール保護装
置。
2. An oil seal protection device for a rotary machine according to claim 1, wherein said gas chamber is constituted by a flange-shaped metal fitting attached to said rotary shaft and a bottom plate of said lubricating oil tank.
JP19146496A 1996-07-01 1996-07-01 Oil seal protector for rotating machine Expired - Fee Related JP3871073B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19146496A JP3871073B2 (en) 1996-07-01 1996-07-01 Oil seal protector for rotating machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19146496A JP3871073B2 (en) 1996-07-01 1996-07-01 Oil seal protector for rotating machine

Publications (2)

Publication Number Publication Date
JPH1019133A true JPH1019133A (en) 1998-01-23
JP3871073B2 JP3871073B2 (en) 2007-01-24

Family

ID=16275092

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19146496A Expired - Fee Related JP3871073B2 (en) 1996-07-01 1996-07-01 Oil seal protector for rotating machine

Country Status (1)

Country Link
JP (1) JP3871073B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111946822A (en) * 2020-07-17 2020-11-17 青海高等职业技术学院(海东市中等职业技术学校) Sealing leakage-proof device for machine tool protective cover and machine tool base
US11719320B2 (en) 2020-11-11 2023-08-08 Seiko Epson Corporation Driving device and assembling method for driving device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111946822A (en) * 2020-07-17 2020-11-17 青海高等职业技术学院(海东市中等职业技术学校) Sealing leakage-proof device for machine tool protective cover and machine tool base
US11719320B2 (en) 2020-11-11 2023-08-08 Seiko Epson Corporation Driving device and assembling method for driving device

Also Published As

Publication number Publication date
JP3871073B2 (en) 2007-01-24

Similar Documents

Publication Publication Date Title
KR850004306A (en) Hermetic Shroud Compressor
US5387040A (en) Sealing system
US4265495A (en) Engine block and crankshaft bearing seal
JPH0357315B2 (en)
EP0412634B1 (en) Sealing device for oil rotary vacuum pump
JPH1019133A (en) Oil seal protective device for rotary machine
JP2001254697A (en) Fluid compressor
CN106640972B (en) A kind of slide bearing assembly
JP5840060B2 (en) Rotary compressor
CN209943506U (en) Industrial robot sealing joint
CN110905926A (en) Bearing bush and gear box
CN211398318U (en) Bearing bush and gear box
JPS59164436A (en) Assembly of bevel gear
JPH0121746Y2 (en)
CN205446705U (en) Gas tightness head axle sealing mechanism
CN219795882U (en) Bearing sealing structure of vibration exciter of screening equipment
US20220216763A1 (en) Rotating Machine
CN218882965U (en) Nine roller bearing sieve axle head sealing device
CN219572625U (en) Sealing structure of large gear ring gear cover of rotary kiln
CN209781239U (en) submerged pump for conveying titanium tetrachloride
JPH0227189A (en) Closed type rotary compressor
CN213270433U (en) Seal structure and pump
CN213016853U (en) Low-temperature liquid pump for industrial gas filling
CN220060466U (en) Prevent leaking AGV high-speed gyration speed reducer
CN211202215U (en) Hand pump protective structure

Legal Events

Date Code Title Description
A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20060131

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20060202

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20060327

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20060522

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20060529

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20060928

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20061011

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20101027

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20111027

Year of fee payment: 5

LAPS Cancellation because of no payment of annual fees