JPH07269576A - Seal structure of rotating bearing - Google Patents
Seal structure of rotating bearingInfo
- Publication number
- JPH07269576A JPH07269576A JP6084146A JP8414694A JPH07269576A JP H07269576 A JPH07269576 A JP H07269576A JP 6084146 A JP6084146 A JP 6084146A JP 8414694 A JP8414694 A JP 8414694A JP H07269576 A JPH07269576 A JP H07269576A
- Authority
- JP
- Japan
- Prior art keywords
- frame
- sealing material
- base end
- sealing
- ring body
- 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
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
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
-
- 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
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
- F16C33/783—Details of the sealing or parts thereof, e.g. geometry, material of the mounting region
-
- 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
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
- F16C19/16—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls
- F16C19/163—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls with angular contact
- F16C19/166—Four-point-contact ball bearings
-
- 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
- F16C2300/00—Application independent of particular apparatuses
- F16C2300/10—Application independent of particular apparatuses related to size
- F16C2300/14—Large applications, e.g. bearings having an inner diameter exceeding 500 mm
-
- 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
- F16C2350/00—Machines or articles related to building
- F16C2350/26—Excavators
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Component Parts Of Construction Machinery (AREA)
- Body Structure For Vehicles (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、例えば油圧ショベル等
の建設機械に採用される旋回軸受のシール構造に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seal structure for a slewing bearing used in construction machines such as hydraulic excavators.
【０００２】[0002]
【従来技術及び発明が解決しようとする課題】一般に、
この種油圧ショベル等の建設機械においては、上部旋回
体が下部走行体（基台）に対して全角度の範囲で旋回で
きる構造になっている。この場合に、上部旋回体と下部
走行体とのあいだに設けられる旋回軸受は、基台側のフ
レーム上面に一体的にボルト固定される内側輪体（内
輪）と、旋回体側フレームの下面に一体的にボルト固定
される外側輪体（外輪）とのあいだに複数のボールを介
装して構成されるが、このものにおいて、両輪体の間、
およびフレームとこれに固定される輪体との対向面間を
シールして、潤滑油の漏洩を防止すると共に、外部から
水、泥、砂、ゴミ等の異物が侵入することを防止する必
要がある。BACKGROUND OF THE INVENTION Generally,
In construction machines such as this type of hydraulic excavator, the upper revolving structure has a structure capable of revolving within a range of all angles with respect to the lower traveling structure (base). In this case, the slewing bearings provided between the upper revolving structure and the lower traveling structure are integrated with the inner ring (inner ring) integrally bolted to the upper surface of the frame on the base side and the lower surface of the frame on the revolving structure side. It is constructed by interposing a plurality of balls between the outer ring body (outer ring), which is fixed by bolts.
Also, it is necessary to seal between the opposing surfaces of the frame and the ring body fixed to the frame to prevent leakage of lubricating oil and to prevent foreign matter such as water, mud, sand, and dust from entering from the outside. is there.
【０００３】そこで従来は、図５に示す如く、両輪体間
のシールについては、外輪４の内周面（内輪５の外周
面）にシール材用の取付け溝１１を形成し、該取付け溝
１１に、内輪５の上面（外輪４の下面）に接当するリッ
プ状の先端部を有するシール材１２の基端部を圧入し接
着材で固着していた。しかるに、このシール材１２の取
付け溝１１への取付け作業は面倒かつ煩雑である許り
か、取付け溝１１の圧入寸法の誤差や接着不十分の場合
等にシール材が外れてしまう惧れがあった。一方、フレ
ーム１ａ、３ａとこれに固定される輪体４、５との対向
面間のシールについては、該対向面間に液状シール材を
塗布することで行っていたが、塗布量や液状シール材に
よっては、対向面間の摩擦抵抗が低下し、輪体とフレー
ムとを固定するボルト１ｂ、３ｂに緩み等の悪影響を及
ぼしかねない。Therefore, conventionally, as shown in FIG. 5, for the seal between the two wheels, a mounting groove 11 for a sealing material is formed on the inner peripheral surface of the outer ring 4 (the outer peripheral surface of the inner ring 5), and the mounting groove 11 is formed. Then, the base end portion of the seal material 12 having a lip-shaped tip portion that abuts on the upper surface of the inner ring 5 (the lower surface of the outer ring 4) is press-fitted and fixed by an adhesive material. However, the work of mounting the sealing material 12 in the mounting groove 11 is troublesome and complicated, and there is a possibility that the sealing material may come off due to an error in the press-fitting dimension of the mounting groove 11 or insufficient adhesion. . On the other hand, the sealing between the facing surfaces of the frames 1a and 3a and the ring bodies 4 and 5 fixed thereto is performed by applying a liquid sealing material between the facing surfaces. Depending on the material, the frictional resistance between the facing surfaces may be lowered, and the bolts 1b and 3b for fixing the wheel body and the frame may be adversely affected such as loosening.
【０００４】[0004]
【課題を解決するための手段】本発明は、上記の如き実
情に鑑みこれらの欠点を一掃することができる旋回軸受
のシール構造を提供することを目的として創案されたも
のであって、基台側フレームの上面に一体的にボルト固
定される内側輪体と、旋回体側フレームの下面に一体的
にボルト固定される外側輪体とのあいだにボールを介装
してなる旋回軸受において、一方の輪体側から突出する
リップ状の先端部を他方の輪体側に弾圧状に接触させて
両輪体間のシールをするためのシール材を設けるにあた
り、前記シール材の基端部を、フレームとこれに固定さ
れる輪体との対向面間に一体的に押圧挟持したことを特
徴とするものである。SUMMARY OF THE INVENTION The present invention was devised with the object of providing a seal structure for a slewing bearing capable of eliminating these drawbacks in view of the above-mentioned circumstances. In a slewing bearing in which a ball is interposed between an inner ring body integrally bolted to the upper surface of the side frame and an outer ring body integrally bolted to the lower surface of the revolving unit side frame, one of In providing a sealing material for sealing between the two ring bodies by elastically contacting the lip-shaped tip portion protruding from the ring body side with the other ring body side, the base end portion of the sealing material is attached to the frame and this. It is characterized in that it is integrally pressed and sandwiched between the surfaces facing the wheel body to be fixed.
【０００５】また本発明は、基台側フレームの上面に一
体的にボルト固定される内側輪体と、旋回体側フレーム
の下面に一体的にボルト固定される外側輪体とのあいだ
にボールを介装してなる旋回軸受において、一方の輪体
側から突出するリップ状の先端部を他方の輪体側に弾圧
状に接触させて両輪体間のシールをするためのシール材
を設けるにあたり、前記シール材の基端部には輪体側に
向けて突出する抜止め突条を形成する一方、輪体のフレ
ーム固定側面部には深溝部を有する取付け溝部を形成し
て、抜止め突条が深溝部に嵌合係止する状態で取付け溝
部に取付け組込みされるシール材基端部を、フレームと
これに固定される輪体との対向面間に一体的に挟持する
と共に、シール材基端部のフレームおよび輪体の各対向
面には、輪体のフレームへのボルト固定で押圧される密
封用の突条が形成されていることを特徴とするものであ
る。Further, according to the present invention, a ball is interposed between an inner ring body integrally bolted to the upper surface of the base side frame and an outer ring body integrally bolted to the lower surface of the revolving unit side frame. In a slewing bearing to be mounted, when a lip-shaped tip portion protruding from one wheel body side is elastically contacted with the other wheel body side to provide a sealing material for sealing between the two wheel bodies, the sealing material is used. While forming a retaining ridge protruding toward the wheel side at the base end of the, the mounting groove with a deep groove is formed on the frame fixing side surface of the wheel so that the retaining ridge is located in the deep groove. The base of the sealing material, which is mounted and incorporated in the mounting groove in the fitted and locked state, is integrally sandwiched between the facing surfaces of the frame and the ring body fixed to the frame, and the frame of the base of the sealing material is also provided. And each face of the ring It is characterized in that the protrusion of the seal which is pressed by a bolt fixed to the over arm is formed.
【０００６】そして本発明は、この構成によって、シー
ル材を簡単かつ確実に取り付けることができると共に、
フレームと輪体との対向面間に液状シール材を塗布しな
くてもシールできるようにしたものである。According to the present invention, with this structure, the sealing material can be easily and surely attached, and
It is possible to perform sealing without applying a liquid sealing material between the facing surfaces of the frame and the wheel body.
【０００７】[0007]
【実施例】次に、本発明の実施例を図面に基づいて説明
する。１は油圧ショベルの上部旋回体であって、該上部
旋回体１は、後述する旋回軸受２を介して、本発明の基
台に相当する下部走行体３に対して全角度の範囲で旋回
自在な状態で搭載されている。Embodiments of the present invention will now be described with reference to the drawings. Reference numeral 1 is an upper revolving structure of a hydraulic excavator, and the upper revolving structure 1 is freely revolvable through a revolving bearing 2 described later with respect to a lower traveling structure 3 corresponding to a base of the present invention in a range of all angles. It is installed in such a state.
【０００８】前記旋回軸受２は、上部旋回体１側の旋回
体フレーム１ａの下面にボルト１ｂを用いて一体的に固
定される外輪（外側輪体）４と、該外輪４の内周側に僅
かな間隙を有する状態で嵌合し、下部走行体３側の基台
フレーム３ａの上面にボルト３ｂを用いて一体的に固定
される内輪（内側輪体）５と、外輪４の内周面部と内輪
５の外周面部との間に介装される複数のボール２ａとを
用いて構成されている。また、上記内輪５の内周面部に
は内歯ギア５ａが形成されており、該内歯ギア５ａに
は、旋回体フレーム１ａに設けられる旋回用駆動機構６
から下方に向けて突出する出力軸ギア６ａが噛合してい
る。そして、旋回用駆動機構６の駆動に伴う出力軸ギア
６ａの正逆回動に基づいて、上部旋回体１が下部走行体
３に対して旋回する構成となっている。The revolving bearing 2 has an outer ring (outer ring body) 4 integrally fixed to the lower surface of the revolving unit frame 1a on the upper revolving unit 1 side by using bolts 1b, and an inner peripheral side of the outer ring 4. An inner ring (inner ring body) 5 fitted together with a slight gap and integrally fixed to the upper surface of the base frame 3a on the lower traveling body 3 side using bolts 3b, and an inner peripheral surface portion of the outer ring 4. And a plurality of balls 2a interposed between the inner ring 5 and the outer peripheral surface of the inner ring 5. An internal gear 5a is formed on the inner peripheral surface of the inner ring 5, and the internal gear 5a is provided with a revolving drive mechanism 6 provided on the revolving structure frame 1a.
The output shaft gear 6a protruding downward from the gear meshes with the output shaft gear 6a. The upper revolving structure 1 revolves with respect to the lower traveling structure 3 based on forward and reverse rotations of the output shaft gear 6a accompanying the drive of the revolving drive mechanism 6.
【０００９】一方、７、８は前記旋回軸受２に設けられ
るリング状のシール材であって、ボール２ａの上方に配
されるシール材７と下方に配されるシール材８とがある
が、同様にして旋回軸受２に設けられるものであるた
め、上方に配されるシール材７についてのみ説明し、下
方に配されるシール材８については区別するため（ ）
内に示す。On the other hand, reference numerals 7 and 8 denote ring-shaped seal materials provided on the orbiting bearing 2, and there are a seal material 7 arranged above the ball 2a and a seal material 8 arranged below. Similarly, since it is provided on the slewing bearing 2, only the sealing material 7 arranged above will be described, and the sealing material 8 arranged below will be distinguished ().
Shown in
【００１０】つまり、上方（下方）に配されるシール材
７（８）は、内周縁部が先端部で外周縁部が基端部（外
周縁部が先端部で内周縁部が基端部）となっているが、
先端部には斜め下方（斜め上方）に向けて突出するリッ
プ状部７ａ（８ａ）が形成されており、また基端部には
下方（上方）に向けて突出する抜止め突条７ｂ（８ｂ）
が全周に亘って形成されている。さらに、シール材７
（８）の基端部の上下面には、周回り方向を向いた断面
略半円状の密封用突条７ｃ（８ｃ）がそれぞれ二本づつ
突設されている。That is, in the sealing material 7 (8) disposed above (downward), the inner peripheral edge portion is the tip end portion and the outer peripheral edge portion is the base end portion (the outer peripheral edge portion is the tip end portion and the inner peripheral edge portion is the base end portion). ),
A lip-shaped portion 7a (8a) protruding obliquely downward (obliquely upward) is formed at the distal end portion, and a retaining protrusion 7b (8b) protruding downward (upward) is formed at the proximal end portion. )
Is formed over the entire circumference. Furthermore, the sealing material 7
Two sealing protrusions 7c (8c) each having a substantially semicircular cross section and facing the circumferential direction are provided on the upper and lower surfaces of the base end portion (8).
【００１１】一方、外輪４の上面の内周側角部（内輪５
の下面の外周側角部）には、シール材７（８）用の取付
け溝部９（１０）が段差状に切欠き形成されているが、
該取付け溝部９（１０）の溝奥部には、前記シール材７
（８）基端部の抜止め突条７ｂ（８ｂ）に嵌合係止する
深溝部９ａ（１０ａ）がさらに凹設されている。そして
シール材７（８）を旋回軸受２に組付ける場合には、外
輪４（内輪５）を旋回体フレーム１ａ（基台フレーム３
ａ）にボルト固定する前の段階で、前記深溝部９ａ（１
０ａ）に抜止め突条７ｂ（８ｂ）を嵌合するようにして
シール材７（８）の基端部を取付け溝部９（１０）に組
み込む。しかる後、ボルト１ｂ（３ｂ）を緊締して外輪
４（内輪５）を旋回体フレーム１ａ（基台フレーム３
ａ）に一体的に固定することにより、シール材７（８）
の基端部は、旋回体フレーム１ａの下面（基台フレーム
３ａの上面）と取付け溝部９（１０）の溝底面とのあい
だに、抜止め突条７ｂ（８ｂ）と深溝部９ａ（１０ａ）
との嵌合係止によって抜止めされた状態で押圧挟持され
るが、この状態で、シール材７の先端部のリップ状部７
ａ（８ａ）が内輪５の上面（外輪４の下面）に弾圧状に
接当するように設定されており、これによって外輪４と
内輪５とのあいだの間隙をシールして、内外輪５、４間
に充填される潤滑油の漏洩を防止すると共に、外部から
の水、泥、砂、ゴミ等の異物が侵入することを防止でき
るようになっている。さらに、上記ボルト１ｂの緊締
で、前記シール材７（８）の上下面に突設された密封用
突条７ｃ（８ｃ）が、旋回体フレーム１ａの下面（基台
フレーム３ａの上面）および取付け溝９（１０）の溝底
面に押圧されて潰れた状態となり、これによってシール
材７（８）の旋回体フレーム１ａ（基台フレーム３ａ）
および外輪４（内輪５）との各対向面間を密封できるよ
うになっている。On the other hand, an inner peripheral side corner portion of the upper surface of the outer ring 4 (the inner ring 5
A mounting groove 9 (10) for the seal material 7 (8) is formed in a step-like notch at the outer peripheral corner of the lower surface of
The sealing material 7 is provided in the groove deep portion of the mounting groove portion 9 (10).
(8) The deep groove portion 9a (10a) which is fitted and locked to the retaining protrusion 7b (8b) at the base end portion is further provided as a recess. When the seal material 7 (8) is assembled to the revolving bearing 2, the outer ring 4 (inner ring 5) is attached to the revolving unit frame 1a (base frame 3).
At the stage before bolting to a), the deep groove portion 9a (1
0a) is fitted into the retaining groove 7b (8b), and the base end of the seal material 7 (8) is incorporated into the mounting groove 9 (10). Then, the bolts 1b (3b) are tightened to fix the outer ring 4 (inner ring 5) to the revolving structure frame 1a (base frame 3).
By integrally fixing it to a), the sealing material 7 (8)
Between the lower surface of the revolving unit frame 1a (the upper surface of the base frame 3a) and the groove bottom surface of the mounting groove portion 9 (10), the base end portion of the retaining protrusion 7b (8b) and the deep groove portion 9a (10a).
It is pressed and sandwiched in a state where it is prevented from being disengaged by fitting and locking with, and in this state, the lip-shaped portion 7 at the tip of the sealing material 7
a (8a) is set so as to elastically contact the upper surface of the inner ring 5 (the lower surface of the outer ring 4), thereby sealing the gap between the outer ring 4 and the inner ring 5, It is possible to prevent leakage of the lubricating oil filled between the four parts and to prevent foreign matter such as water, mud, sand and dust from entering from the outside. Further, when the bolt 1b is tightened, the sealing projections 7c (8c) projectingly provided on the upper and lower surfaces of the sealing material 7 (8) are attached to the lower surface (upper surface of the base frame 3a) of the revolving unit frame 1a and the mounting. The bottom surface of the groove 9 (10) is pressed to be crushed, whereby the revolving structure frame 1a (base frame 3a) of the sealing material 7 (8) is formed.
Further, it is possible to seal between the respective facing surfaces of the outer ring 4 (inner ring 5).
【００１２】叙述のごとく構成された本発明の実施例に
おいて、外輪４と内輪５とのあいだのシールは、基端部
が外輪４（内輪５）側に固定され、先端部のリップ状部
７ａ（８ａ）が内輪５の上面（外輪４の下面）に弾圧状
に接当するシール材７（８）によってなされることにな
るが、この場合に、シール材７（８）の基端部は、外輪
４上面の内周側角部（内輪５下面の外周側角部）に切欠
き形成される取付け溝部９（１０）に、抜止め突条７ｂ
（８ｂ）が深溝部９ａ（１０ａ）に嵌合係止する抜止め
状態で組み込まれ、そして外輪４（内輪５）を旋回体フ
レーム１ａに固定すべくボルト１ｂを緊締することで、
旋回体フレーム１ａの下面（基台フレーム３ａの上面）
と取付け溝９（１０）の溝底面とのあいだに押圧挟持さ
れることことになる。In the embodiment of the present invention constructed as described above, the seal between the outer ring 4 and the inner ring 5 has the base end fixed to the outer ring 4 (inner ring 5) side and the lip portion 7a at the tip end. (8a) is made by the sealing material 7 (8) which is elastically pressed against the upper surface of the inner ring 5 (lower surface of the outer ring 4). In this case, the base end of the sealing material 7 (8) is The retaining projections 7b are provided in the mounting groove portions 9 (10) formed in the inner peripheral corners of the upper surface of the outer ring 4 (the outer peripheral corners of the lower surface of the inner ring 5).
(8b) is incorporated in the deep groove portion 9a (10a) so as to be fitted and locked, and by tightening the bolt 1b to fix the outer ring 4 (inner ring 5) to the revolving structure frame 1a,
Lower surface of revolving structure frame 1a (upper surface of base frame 3a)
And the bottom surface of the mounting groove 9 (10) is pressed and sandwiched.
【００１３】この結果、外輪４（内輪５）を旋回体フレ
ーム１ａ（基台フレーム３ａ）に固定するのに必要なボ
ルト１ｂ（３ｂ）の緊締でシール材７（８）を外輪４
（内輪５）に固定できることになって、従来の外輪内周
面（内輪外周面）に形成した取付け溝にシール材の基端
部を圧入して接着材で固着するもののように、面倒かつ
煩雑な圧入作業や接着剤による固着作業を必要とせず、
作業性を大幅に向上せしめることができるうえ、取付け
溝の圧入寸法の誤差や接着不十分に起因するシール材の
脱落を確実に回避することができ、もって簡単かつ確実
なシール材７（８）の取付けを行えることになる。ま
た、シール材７（８）の損傷や劣化等によりシール材７
（８）を交換する場合にも、ボルト１ｂ（３ｂ）を緩め
るだけでシール材７（８）を外輪４（内輪５）から簡単
に取外すことができ、もって交換作業も容易に行えるこ
とになる。As a result, the sealing material 7 (8) is attached to the outer ring 4 by tightening the bolts 1b (3b) necessary to fix the outer ring 4 (inner ring 5) to the revolving structure frame 1a (base frame 3a).
Since it can be fixed to the (inner ring 5), it is cumbersome and complicated as in the case where the base end portion of the sealing material is press-fitted into the mounting groove formed on the inner surface of the outer ring (outer surface of the inner ring) and fixed with an adhesive material. No need for press-fitting work and adhesive work
The workability can be greatly improved, and the sealing material can be surely prevented from falling off due to an error in the press-fitting dimension of the mounting groove or insufficient adhesion, and thus a simple and reliable sealing material 7 (8) Can be installed. In addition, the sealing material 7 (8) may be damaged or deteriorated, etc.
Even when replacing (8), the sealing material 7 (8) can be easily removed from the outer ring 4 (inner ring 5) simply by loosening the bolts 1b (3b), and therefore the replacement work can be performed easily. .
【００１４】さらにシール材７（８）は、前記ボルト１
ｂ（３ｂ）の緊締によって、シール材７（８）基端部の
上下面に突設された密封用突条７ｃ（８ｃ）が、旋回体
フレーム１ａの下面（基台フレーム３ａの上面）および
取付け溝９（１０）の溝底面に押圧されて潰れた状態と
なって、シール材７（８）の旋回体フレーム１ａ（基台
フレーム３ａ）および外輪４（内輪５）との各対向面間
を密封し、これによって旋回体フレーム１ａと外輪４
（基台フレーム３ａと内輪５）との対向面間がシールさ
れることになる。この結果、外輪４と内輪５とのあいだ
をシールするシール材７（８）をそのまま利用して、旋
回体フレーム１ａと外輪４（基台フレーム３ａと内輪
５）との対向面間をシールできることになり、部材の兼
用化が計れる許りか、従来のように前記対向面間に液状
シールを塗布する作業も不要となり、しかも液状シール
によって対向面間の摩擦抵抗が低下してボルト１ｂ（３
ｂ）が緩んでしまう不具合が発生する惧れもなく、信頼
性の高いものとすることができる。Further, the sealing material 7 (8) is the bolt 1
By the tightening of b (3b), the sealing ridges 7c (8c) projectingly provided on the upper and lower surfaces of the base end portion of the sealing material 7 (8) are attached to the lower surface of the revolving unit frame 1a (the upper surface of the base frame 3a) and Between the respective opposing surfaces of the seal member 7 (8) with the revolving structure frame 1a (base frame 3a) and the outer ring 4 (inner ring 5) by being pressed by the groove bottom surface of the mounting groove 9 (10) to be crushed. To seal the revolving structure frame 1a and outer ring 4
The space between the opposing surfaces of (base frame 3a and inner ring 5) is sealed. As a result, it is possible to seal between the facing surfaces of the revolving structure frame 1a and the outer ring 4 (the base frame 3a and the inner ring 5) by using the seal material 7 (8) that seals between the outer ring 4 and the inner ring 5 as it is. Perhaps it can be used as a member, and the work of applying a liquid seal between the facing surfaces as in the conventional case is not necessary, and the friction resistance between the facing surfaces is reduced by the liquid seal, and the bolt 1b (3
There is no fear that the problem of loosening b) will occur, and the reliability can be made high.
【００１５】尚、本発明は前記実施例に限定されるもの
でないことは勿論であって、シール材は、輪体ではなく
フレーム側に同様にして形成した取付け溝に抜止め状に
設けられる構成にしても良く、また両者のあいだに形成
した取付け溝に抜止め状に設けられる構成にしても良
い。また、取付け溝を輪体側に形成したものである場合
に、抜止め用の深溝部をフレーム側に形成しても良く、
さらに、シール材を抜止め係止する手段としては、深溝
に限定されることもなく、例えば、取付け溝に適間隔を
存して突起（ピン）を突設し、この突起をシール材側に
穿設した係止孔に嵌合係止することで抜止めするように
構成することもできる。また、輪体のフレームへのボル
ト固定で押圧されて前記各対向面間の密封をするための
密封用突条を形成する場合に、断面半円形のものに限ら
ず、三角形、台形等、適宜の断面形状のものにすること
ができる。さらには、輪体とフレームとの対向面間の密
封をするには、前記第一実施例とは逆に、輪体、フレー
ム側にシール材を押圧する突条を形成する構成としても
勿論良い。The present invention is not limited to the above-mentioned embodiment, and the sealing material is provided in a mounting groove formed in the same manner on the frame side, not on the ring body, in a retaining manner. Alternatively, the mounting groove formed between the two may be provided in a retaining shape. Also, when the mounting groove is formed on the wheel body side, a deep groove portion for retaining may be formed on the frame side,
Further, the means for retaining and locking the sealing material is not limited to the deep groove. For example, a protrusion (pin) is provided at an appropriate interval in the mounting groove, and the protrusion is provided on the sealing material side. It can also be configured so as to prevent it from coming off by being fitted and locked in the drilled locking hole. Further, in the case of forming the sealing ridges for pressing between the facing surfaces by being fixed by bolting to the frame of the ring body, the shape is not limited to a semicircular cross section, but may be a triangle, a trapezoid, or the like as appropriate. Can have a cross-sectional shape. Further, in order to seal between the opposing surfaces of the ring body and the frame, contrary to the first embodiment, it is of course possible to form a ridge for pressing the sealing material on the ring body and the frame side. .
【００１６】[0016]
【作用効果】以上要するに、本発明は叙述の如く構成さ
れたものであるから、両輪体間のシールをするシール材
は、その基端部が、フレームとこれにボルト固定される
輪体との対向面間に一体的に押圧挟持されることにな
る。この結果、輪体をフレームにボルト固定することに
伴ってシール材基端部が輪体に固定されることになっ
て、従来のように面倒かつ煩雑な圧入作業や接着剤によ
る固着作業を必要とせず、作業性を大幅に向上せしめる
ことができるうえ、圧入寸法の誤差や接着不十分に起因
するシール材の脱落を確実に回避することができ、もっ
て簡単かつ確実なシール材の取付けを行えることにな
る。また、シール材を交換する場合にも、ボルトを緩め
るだけでシール材を輪体から簡単に取外すことができ、
交換作業も容易に行えることになる。In summary, since the present invention is constructed as described above, the seal material for sealing between the two wheels has the base end portion of the frame and the wheel body fixed to the frame by bolts. It will be pressed and sandwiched integrally between the facing surfaces. As a result, the base end of the sealing material is fixed to the ring body as the ring body is bolted to the frame, which requires complicated and complicated press-fitting work and fixing work with an adhesive as in the past. In addition to greatly improving workability, it is possible to reliably prevent the sealing material from falling off due to an error in the press-fitting dimension or insufficient adhesion, which allows easy and reliable mounting of the sealing material. It will be. Also, when replacing the sealing material, you can easily remove the sealing material from the wheel body by loosening the bolts,
The replacement work can be easily performed.
【００１７】さらに、シール材基端部のフレームおよび
輪体との各対向面に、輪体のフレームへのボルト固定で
押圧されて前記各対向面間の密封をするための密封用突
条を形成した場合には、シール材をそのまま利用してフ
レームとこれに固定される輪体との対向面間を確実にシ
ールできることになって、従来のように対向面間に液状
シールを塗布する作業が不要となる許りか、液状シール
によって対向面間の摩擦抵抗が低下してボルトが緩んで
しまう不具合の発生する惧れもなく、信頼性の高いもの
とすることができる。Further, a sealing ridge is formed on each of the surfaces of the base end portion of the sealing material, which faces the frame and the ring body, and which is pressed by fixing the ring of the ring body to the frame and seals between the facing surfaces. If formed, the sealing material can be used as it is to reliably seal between the facing surfaces of the frame and the ring body fixed to this, and the work of applying a liquid seal between the facing surfaces as in the past Since the liquid seal does not need to be used, there is no fear that the frictional resistance between the facing surfaces is lowered by the liquid seal and the bolt is loosened, and the reliability can be made high.
【図１】油圧ショベルの概略側面図である。FIG. 1 is a schematic side view of a hydraulic excavator.
【図２】旋回軸受の要部断面図である。FIG. 2 is a sectional view of a main part of a slewing bearing.
【図３】シール材の一部斜視図である。FIG. 3 is a partial perspective view of a sealing material.
【図４】シール材の取付け状態を示す斜視図である。FIG. 4 is a perspective view showing a mounting state of a sealing material.
【図５】従来例を示す旋回軸受の断面図である。FIG. 5 is a sectional view of a slewing bearing showing a conventional example.
１ 上部旋回体 １ａ 旋回体フレーム １ｂ ボルト ２ 旋回軸受 ２ａ ボール ３ 下部走行体 ３ａ 基台フレーム ３ｂ ボルト ４ 外輪 ５ 内輪 ７ シール材 ７ａ リップ状部 ７ｂ 抜止め突条 ７ｃ 密封用突条 ８ シール材 ８ａ リップ状部 ８ｂ 抜止め突条 ８ｃ 密封用突条 ９ 取付け溝部 ９ａ 深溝部 １０ 取付け溝部 １０ａ 深溝部 1 Upper revolving structure 1a Revolving structure frame 1b Bolt 2 Revolving bearing 2a Ball 3 Lower traveling structure 3a Base frame 3b Bolt 4 Outer ring 5 Inner ring 7 Sealing material 7a Lip-shaped part 7b Detachment projection 7c Sealing projection 8 Sealing material 8a Lip-shaped part 8b Detachable protrusion 8c Sealing protrusion 9 Mounting groove 9a Deep groove 10 Mounting groove 10a Deep groove
Claims (6)
固定される内側輪体と、旋回体側フレームの下面に一体
的にボルト固定される外側輪体とのあいだにボールを介
装してなる旋回軸受において、一方の輪体側から突出す
るリップ状の先端部を他方の輪体側に弾圧状に接触させ
て両輪体間のシールをするためのシール材を設けるにあ
たり、前記シール材の基端部を、フレームとこれに固定
される輪体との対向面間に一体的に押圧挟持したことを
特徴とする旋回軸受のシール構造。1. A ball is interposed between an inner ring body integrally bolted to an upper surface of a base side frame and an outer ring body integrally bolted to a lower surface of a revolving unit side frame. In the slewing bearing, the base end of the sealing material is provided when a lip-shaped tip portion protruding from one wheel body side is elastically contacted with the other wheel body side to provide a sealing material for sealing between the two wheel bodies. A seal structure for a slewing bearing, characterized in that the portion is integrally pressed and sandwiched between opposing surfaces of a frame and a ring body fixed to the frame.
固定側面部にシール材の基端部が取付け組込みされる取
付け溝部を形成し、該取付け溝部に組込まれたシール材
の基端部を、フレームとこれに固定される輪体との対向
面間に一体的に挟持したことを特徴とする旋回軸受のシ
ール構造。2. The mounting groove portion according to claim 1, wherein a mounting end portion of the base material of the sealing material is mounted and incorporated in the frame fixing side surface portion of the ring body, and the base end portion of the sealing material incorporated in the mounting groove portion is formed. A seal structure for a slewing bearing, wherein the seal structure is integrally sandwiched between opposed surfaces of a frame and a ring body fixed to the frame.
ール材基端部に設けられる抜止め部に係止してシール材
の抜止めをする係止部が形成されていることを特徴とす
る旋回軸受のシール構造。3. The mounting groove portion according to claim 2, wherein a locking portion for locking the sealing material by locking with a retaining portion provided at a base end portion of the sealing material is formed. Slewing bearing seal structure
止め部は抜止め突条とし、係止部は、取付け溝部に深溝
状に形成されて抜止め突条が嵌合係止する深溝部である
ことを特徴とする旋回軸受のシール構造。4. The retainer portion of the base end portion of the seal material according to claim 3, wherein the retainer protrusion is a retainer protrusion, and the locking portion is formed in a deep groove shape in the mounting groove portion so that the retainer protrusion engages and locks. A seal structure for a slewing bearing, which is a deep groove portion.
のフレームおよび輪体の各対向面には、輪体のフレーム
へのボルト固定で押圧されて前記各対向面間の密封をす
るための密封用突条が形成されていることを特徴とする
旋回軸受のシール構造。5. The sealing member according to any one of claims 1 to 4, wherein the frame and the ring member at the base end portion of the sealing material are pressed by bolts to the frame of the ring member to seal the facing surfaces. A seal structure for a slewing bearing, characterized in that a sealing ridge for forming is formed.
固定される内側輪体と、旋回体側フレームの下面に一体
的にボルト固定される外側輪体とのあいだにボールを介
装してなる旋回軸受において、一方の輪体側から突出す
るリップ状の先端部を他方の輪体側に弾圧状に接触させ
て両輪体間のシールをするためのシール材を設けるにあ
たり、前記シール材の基端部には輪体側に向けて突出す
る抜止め突条を形成する一方、輪体のフレーム固定側面
部には深溝部を有する取付け溝部を形成して、抜止め突
条が深溝部に嵌合係止する状態で取付け溝部に取付け組
込みされるシール材基端部を、フレームとこれに固定さ
れる輪体との対向面間に一体的に挟持すると共に、シー
ル材基端部のフレームおよび輪体の各対向面には、輪体
のフレームへのボルト固定で押圧される密封用の突条が
形成されていることを特徴とする旋回軸受のシール構
造。6. A ball is interposed between an inner ring body integrally bolted to the upper surface of the base side frame and an outer ring body integrally bolted to the lower surface of the revolving unit side frame. In the slewing bearing, the base end of the sealing material is provided when a lip-shaped tip portion protruding from one wheel body side is elastically contacted with the other wheel body side to provide a sealing material for sealing between the two wheel bodies. The retaining projection is formed on the side of the wheel body so as to project toward the wheel body, while the mounting groove having the deep groove is formed on the frame fixing side surface of the wheel so that the retaining projection fits into the deep groove. The sealing material base end portion, which is mounted and assembled in the mounting groove portion in a stopped state, is integrally sandwiched between the facing surfaces of the frame and the ring body fixed thereto, and the sealing material base end portion frame and ring body are provided. Each opposing surface of the A seal structure for a slewing bearing, which is characterized in that a sealing ridge is formed which is pressed by fixing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6084146A JP2963839B2 (en) | 1994-03-30 | 1994-03-30 | Slewing bearing seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6084146A JP2963839B2 (en) | 1994-03-30 | 1994-03-30 | Slewing bearing seal structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07269576A true JPH07269576A (en) | 1995-10-17 |
| JP2963839B2 JP2963839B2 (en) | 1999-10-18 |
Family
ID=13822366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6084146A Expired - Fee Related JP2963839B2 (en) | 1994-03-30 | 1994-03-30 | Slewing bearing seal structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2963839B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012159114A (en) * | 2011-01-31 | 2012-08-23 | Ntn Corp | Sealing structure for turning bearing |
| WO2012128103A1 (en) * | 2011-03-18 | 2012-09-27 | Ntn株式会社 | Seal structure for slewing bearing, and slewing bearing |
| JP2012193826A (en) * | 2011-03-18 | 2012-10-11 | Ntn Corp | Seal structure for slewing bearing, and slewing bearing |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10288173B2 (en) | 2014-10-06 | 2019-05-14 | Caterpillar Inc. | Seal member for joint of machine and method of assembling same |
| US10288174B2 (en) | 2014-10-06 | 2019-05-14 | Caterpillar Inc. | Seal member for joint of machine |
| KR101867404B1 (en) * | 2016-08-17 | 2018-06-15 | 주식회사 일진글로벌 | A driving wheel bearing device |
-
1994
- 1994-03-30 JP JP6084146A patent/JP2963839B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012159114A (en) * | 2011-01-31 | 2012-08-23 | Ntn Corp | Sealing structure for turning bearing |
| WO2012128103A1 (en) * | 2011-03-18 | 2012-09-27 | Ntn株式会社 | Seal structure for slewing bearing, and slewing bearing |
| JP2012193826A (en) * | 2011-03-18 | 2012-10-11 | Ntn Corp | Seal structure for slewing bearing, and slewing bearing |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2963839B2 (en) | 1999-10-18 |
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