JPH10112952A - Shaft sealing structure of gear motor - Google Patents
Shaft sealing structure of gear motorInfo
- Publication number
- JPH10112952A JPH10112952A JP8264583A JP26458396A JPH10112952A JP H10112952 A JPH10112952 A JP H10112952A JP 8264583 A JP8264583 A JP 8264583A JP 26458396 A JP26458396 A JP 26458396A JP H10112952 A JPH10112952 A JP H10112952A
- Authority
- JP
- Japan
- Prior art keywords
- motor shaft
- motor
- filter
- oil seal
- hole
- 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
Landscapes
- General Details Of Gearings (AREA)
- Motor Or Generator Frames (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、モータ部と減速機
部とが仕切壁で区画されているギヤモータにおいて、減
速機部内の潤滑油に含まれる金属粉等の異物がモータ軸
とモータ軸オイルシールのリップとの間に侵入すること
を防止した軸封構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gear motor in which a motor section and a speed reducer section are partitioned by a partition wall, wherein foreign matter such as metal powder contained in lubricating oil in the speed reducer section is reduced by a motor shaft and a motor shaft oil. The present invention relates to a shaft sealing structure that prevents the seal lip from invading the seal lip.
【０００２】[0002]
【従来の技術】従来の一般的なギヤモータは、モータと
減速機とが一体に組み合わされて構成されており、図３
に示すように、ギヤモータ１を構成するモータ部２と減
速機部３とは、減速機部３のギヤケース４の一つの側面
を構成している仕切壁５によって区画され、前記仕切壁
５には、モータ軸６が貫通する貫通孔７が形成されてい
る。2. Description of the Related Art A conventional general gear motor is constructed by integrally combining a motor and a speed reducer.
As shown in FIG. 1, the motor unit 2 and the speed reducer unit 3 that constitute the gear motor 1 are partitioned by a partition wall 5 that forms one side surface of the gear case 4 of the speed reducer unit 3. , A through hole 7 through which the motor shaft 6 passes is formed.
【０００３】前記モータ軸６の先端部外周面にはピニオ
ン８が歯切り形成され、減速機部３内の従動ギヤ９と噛
み合っている。そして、モータ軸６を駆動すると、その
回転は従動ギヤ９から減速部３内の複数のギヤ列を介し
て出力軸１０へ減速して伝達されるように構成されてい
る。A pinion 8 is formed on the outer peripheral surface of the distal end portion of the motor shaft 6 so as to mesh with a driven gear 9 in the reduction gear unit 3. When the motor shaft 6 is driven, the rotation is reduced and transmitted from the driven gear 9 to the output shaft 10 via a plurality of gear trains in the reduction unit 3.
【０００４】前記仕切壁５に形成されている貫通孔７
は、モータ部２側で内径が拡大されており、そこにモー
タ軸６を支持する軸受１１が嵌装されている。また、貫
通孔７内には軸受１１と隣接してモータ軸オイルシール
１２が配置されていて、減速機部３側に封入されている
グリース等の潤滑油が軸受１１側に漏れ出すことを防止
している。A through hole 7 formed in the partition wall 5
Has an enlarged inner diameter on the motor section 2 side, and a bearing 11 for supporting the motor shaft 6 is fitted therein. A motor shaft oil seal 12 is disposed in the through hole 7 adjacent to the bearing 11 to prevent leakage of lubricating oil such as grease sealed in the reduction gear section 3 to the bearing 11 side. doing.
【０００５】[0005]
【発明が解決しようとする課題】前述した図３に示す構
造の従来のギヤモータ１は、減速機部３内で複数のギヤ
列を潤滑している潤滑油が仕切壁５の貫通孔７を通じて
モータ軸オイルシール１２のリップとモータ軸６との摺
動部を潤滑し、リップが摩耗してモータ軸６との間から
減速機部３側のグリース等の潤滑油が軸受１１側に漏れ
出すことを防いでいるが、減速機部３内の潤滑油にはギ
ヤどうしが擦れ合って生じた微細な摩耗金属粉等の異物
が混入しているため、前記異物がモータ軸オイルシール
１２のリップとモータ軸６の摺動部に侵入するとリップ
の摩耗が促進されて油漏れを生じやすくなる恐れがあ
る。In the conventional gear motor 1 having the structure shown in FIG. 3, the lubricating oil for lubricating a plurality of gear trains in the speed reducer section 3 passes through the through-hole 7 of the partition wall 5 through the motor. Lubricating the sliding portion between the lip of the shaft oil seal 12 and the motor shaft 6, and the lip wears and lubricating oil such as grease on the reduction gear unit 3 side leaks from between the motor shaft 6 to the bearing 11 side. However, since the lubricating oil in the reduction gear unit 3 contains foreign matter such as fine abrasion metal powder generated by rubbing of gears, the foreign matter may cause a lip of the motor shaft oil seal 12. When the lip enters the sliding portion of the motor shaft 6, abrasion of the lip is promoted and oil leakage may easily occur.
【０００６】一方、実開平１−１３５２５９号公報に
は、図４に示すように、モータ軸２１に振切板２２を固
定して、オイルシール２３側に金属粉等を含んだ減速機
部２４内部の潤滑油が入り込むことを防止する技術が開
示されているが、振切板の外周部分を越えて減速機部側
の潤滑油がオイルシール側に侵入して、潤滑油中の金属
粉等がオイルシールを摩耗させる恐れがあり、また、振
切板とオイルシールとの間に潤滑油が供給されないと、
モータ軸外周面とオイルシールが直接擦れ合うため、オ
イルシールの寿命が短くなる恐れがある。On the other hand, in Japanese Utility Model Laid-Open Publication No. 1-135259, as shown in FIG. 4, a shaking plate 22 is fixed to a motor shaft 21 and a reduction gear unit 24 containing metal powder or the like is provided on an oil seal 23 side. Although a technique for preventing internal lubricating oil from entering is disclosed, lubricating oil on the reduction gear section side enters the oil seal side beyond the outer peripheral portion of the shaking plate, and metal powder and the like in the lubricating oil are removed. May wear the oil seal, and if lubricating oil is not supplied between the shaking plate and the oil seal,
Since the outer peripheral surface of the motor shaft and the oil seal directly rub against each other, the life of the oil seal may be shortened.
【０００７】また、実公平７−５６５９８号公報には、
図５に示すように、オイルシール３１のモータ軸３２外
周面に当接する主リップ３３の減速機部側に補助リップ
３４を設け、補助リップによって金属粉等を含んだ減速
機部内の潤滑油が主リップへ付着することを防止する技
術が開示されているが、金属粉等を含んだ潤滑油に接触
している補助リップが早期に摩耗してしまう恐れがある
とともに、近接して配置される主リップと補助リップの
両方をモータ軸に密着させるために、オイルシールに高
い製作精度や取付精度が必要となり、コストが高くなる
可能性がある。Further, Japanese Utility Model Publication No. 7-56598 discloses that
As shown in FIG. 5, an auxiliary lip 34 is provided on the side of the reduction gear section of the main lip 33 which abuts on the outer peripheral surface of the motor shaft 32 of the oil seal 31. Although a technique for preventing the main lip from adhering to the main lip is disclosed, the auxiliary lip that is in contact with the lubricating oil containing metal powder or the like may be worn out early, and may be disposed close to the main lip. Since both the main lip and the auxiliary lip are brought into close contact with the motor shaft, high production accuracy and mounting accuracy are required for the oil seal, which may increase the cost.
【０００８】さらに、特公平８−３２１４３号公報に
は、図６に示すようにオイルシール４１の減速機部側に
遮蔽部材４２を配置して前記遮蔽部材４２とオイルシー
ル４１との間に減速機部内の潤滑油よりも高粘度の冷却
兼用潤滑剤を保留する空間部４３を確保して、前記冷却
兼用潤滑剤によって減速機部内の潤滑油が前記空間部４
３内に侵入することを阻止する技術が開示されている。Further, Japanese Patent Publication No. 8-32143 discloses that a shielding member 42 is disposed on the side of the speed reducer of the oil seal 41 so as to reduce the speed between the shielding member 42 and the oil seal 41 as shown in FIG. A space 43 for retaining a cooling / lubricating oil having a higher viscosity than the lubricating oil in the machine unit is secured, and the lubricating oil in the speed reducer unit is reduced by the cooling / lubricating oil to the space 4.
3 has been disclosed.
【０００９】しかしながら、前記特公平８−３２１４３
号公報に記載されている構造では、冷却兼用潤滑剤を保
留する空間部をモータ軸を包囲して設けているため、軸
受位置から減速機部側へのモータ軸の突出長さが長くな
り、その結果ギヤモータの全長が長くなる問題がある。[0009] However, the aforementioned Japanese Patent Publication No. 8-32143.
In the structure described in the publication, since a space for holding the cooling / combining lubricant is provided so as to surround the motor shaft, the projecting length of the motor shaft from the bearing position to the reduction gear unit side is increased, As a result, there is a problem that the total length of the gear motor becomes long.
【００１０】また、前記空間部内の冷却兼用潤滑剤は消
耗するため、これを補給する必要があるが、冷却兼用潤
滑剤の消耗状態を外部から見ることができないため、保
守が困難であるとともに、空間部内へ外部から冷却兼用
潤滑剤を補給する注入路が必要となるため、ギヤモータ
の製造コストが高くなる可能性がある。Further, since the cooling / lubricating lubricant in the space is consumed, it is necessary to replenish the cooling / lubricating lubricant. However, since the state of consumption of the cooling / lubricating lubricant cannot be seen from the outside, maintenance is difficult, and Since an injection path for externally supplying a cooling / lubricating lubricant into the space is required, the manufacturing cost of the gear motor may increase.
【００１１】そこで、本発明は、前述したような従来技
術における諸問題を解決し、減速機部側の潤滑油に含ま
れる金属粉等の異物がモータ軸とモータ軸オイルシール
のリップとの間に侵入することを防止してモータ軸オイ
ルシールの寿命を延長できる低コストなギヤモータの軸
封構造を提供することを目的とする。Therefore, the present invention solves the above-mentioned problems in the prior art, and foreign matter such as metal powder contained in the lubricating oil on the side of the speed reducer is formed between the motor shaft and the lip of the motor shaft oil seal. It is an object of the present invention to provide a low-cost gear motor shaft sealing structure that can prevent the motor shaft oil seal from intruding into the motor shaft and extend the life of the motor shaft oil seal.
【００１２】[0012]
【課題を解決するための手段】前記目的を達成するた
め、本発明のギヤモータの軸封構造は、モータ部と減速
機部とが仕切壁によって区画され、モータ軸が前記仕切
壁に形成された貫通孔を貫通してモータ軸先端のピニオ
ンが減速機部内の従動ギヤに噛合しているギヤモータに
おいて、前記貫通孔内に配置されたモータ軸オイルシー
ルの減速機部側に隣接して、中心部にモータ軸が挿通さ
れる孔を有し、潤滑油の流通が可能で且つ減速機部側か
らモータ軸オイルシール側への摩耗金属粉等の異物の侵
入を阻止する薄板状のフィルタを設けたものである。前
記フィルタは、フィルタ中心に形成されている孔よりも
大径の孔を中心部に有する一対の補強板によって両側か
ら挟まれて補強されていることが望ましい。In order to achieve the above object, in a shaft sealing structure of a gear motor according to the present invention, a motor portion and a speed reducer portion are partitioned by a partition wall, and a motor shaft is formed on the partition wall. In a gear motor in which a pinion at a tip end of a motor shaft penetrates a through hole and meshes with a driven gear in a speed reducer portion, a center portion of the motor shaft oil seal disposed in the through hole is adjacent to a speed reducer portion side. A thin plate-shaped filter that has a hole through which the motor shaft is inserted, allows the flow of lubricating oil, and prevents foreign matter such as abrasion metal powder from entering the motor shaft oil seal side from the reduction gear unit side. Things. It is preferable that the filter is reinforced by being sandwiched from both sides by a pair of reinforcing plates having at the center a hole having a diameter larger than the hole formed at the center of the filter.
【００１３】[0013]
【作用】減速機部内の潤滑油には、ギヤどうしの噛み合
いによって生じた微細な金属粉等の異物が混入してお
り、前記潤滑油中の異物がモータ軸とモータ軸オイルシ
ールのリップとの間に侵入するとリップを摩耗させる
が、モータ軸オイルシールの減速機部側に隣接して設け
られた薄板状のフィルタによって、前記潤滑油中に浮遊
している微細な金属粉等の異物が濾過され、モータ軸オ
イルシールは異物を含んでいない潤滑油で潤滑されるた
めリップの摩耗が抑制される。The lubricating oil in the reduction gear section contains foreign matter such as fine metal powder generated by the meshing of the gears, and the foreign matter in the lubricating oil forms a gap between the motor shaft and the lip of the motor shaft oil seal. The lip will be worn out if it enters the gap, but foreign matter such as fine metal powder floating in the lubricating oil is filtered by a thin plate filter provided adjacent to the reduction gear section side of the motor shaft oil seal. Since the motor shaft oil seal is lubricated with lubricating oil containing no foreign matter, wear of the lip is suppressed.
【００１４】また、フィルタを一対の補強板で補強する
ことによって、フィルタの厚みが薄く剛性が小さい場合
でもその変形が防止され、摩耗金属粉等の異物がフィル
タから漏れてモータ軸とモータ軸オイルシールのリップ
との間に侵入することを確実に阻止できる。Further, by reinforcing the filter with a pair of reinforcing plates, even when the thickness of the filter is small and the rigidity thereof is small, deformation of the filter is prevented. Intrusion between the seal and the lip can be reliably prevented.
【００１５】[0015]
【実施例】以下、図面に基づいて本発明の実施例を説明
する。図１は、本発明の第１実施例を示すギヤモータの
要部断面図であって、ギヤモータの基本的の構造は、前
述した図３に示す従来のギヤモータと同様であるので、
共通する部材については、図３中のものと同じ番号で示
している。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a main part of a gear motor according to a first embodiment of the present invention. The basic structure of the gear motor is the same as that of the conventional gear motor shown in FIG.
Common members are indicated by the same numbers as those in FIG.
【００１６】図１に示すように、モータ部２と減速機部
３とを区画する仕切壁５に形成されている貫通孔７はモ
ータ部２側から順に、軸受１１が嵌装されている大径部
７Ａ、前記大径部７Ａに隣接してモータ軸オイルシール
１２が嵌装されている中径部７Ｂ、及び、前記中径部７
Ｂに隣接する小径部７Ｃの内径がそれぞれ異なる３つの
部分から構成されている。As shown in FIG. 1, through holes 7 formed in a partition wall 5 for partitioning the motor section 2 and the speed reducer section 3 are arranged in order from the side of the motor section 2 so that a large bearing 11 is fitted therein. A diameter portion 7A, a middle diameter portion 7B in which the motor shaft oil seal 12 is fitted adjacent to the large diameter portion 7A, and the middle diameter portion 7
The small diameter portion 7C adjacent to B is formed of three portions having different inner diameters.
【００１７】一方、貫通孔７を貫通するモータ軸６は、
軸受１１に嵌合する軸受嵌合部６Ａとモータ軸オイルシ
ール１２のリップ１２Ａが当接するリップ当接部６Ｂと
ピニオン８が先端に歯切りされている軸端部６Ｃとが順
次小径に形成されている。On the other hand, the motor shaft 6 passing through the through hole 7
A bearing fitting portion 6A fitted to the bearing 11, a lip contact portion 6B where the lip 12A of the motor shaft oil seal 12 abuts, and a shaft end portion 6C whose pinion 8 is cut at the tip are formed in order of small diameter. ing.
【００１８】貫通孔７の中径部７Ｂ内には、モータ軸オ
イルシール１２と軸方向に隣接して薄板状のフィルタ１
３が配置され、減速機部３内の潤滑油に混入している摩
耗金属粉等の異物が、モータ軸６のリップ当設部６Ｂと
モータ軸オイルシール１２のリップ１２Ａとの間に侵入
することを防止している。In the middle diameter portion 7B of the through hole 7, a thin plate-shaped filter 1 is provided adjacent to the motor shaft oil seal 12 in the axial direction.
3 is disposed, and foreign matter such as abrasion metal powder mixed into the lubricating oil in the reduction gear unit 3 enters between the lip attachment portion 6B of the motor shaft 6 and the lip 12A of the motor shaft oil seal 12. Is preventing that.
【００１９】前記フィルタ１３には、モータ軸オイルシ
ール１２のリップ１２Ａが当接するモータ軸６のリップ
当接部６Ｂの外周面が回転自在に密着する内径の孔１３
Ａが中心部に形成され、また、その外周面は前記孔１３
Ａと同心状で且つ貫通孔７の中径部７Ｂに適合する円形
の輪郭に形成されている。The filter 13 has a hole 13 with an inner diameter in which the outer peripheral surface of a lip contact portion 6B of the motor shaft 6 with which the lip 12A of the motor shaft oil seal 12 contacts is rotatably contacted.
A is formed at the center, and the outer peripheral surface is formed with the hole 13.
It is formed in a circular contour that is concentric with A and conforms to the middle diameter portion 7B of the through hole 7.
【００２０】前記フィルタ１３の素材としては、ポリエ
ステルやポリアミドなどの不織布が好適であり、これら
の素材を用いれば、薄い板状素材から打ち抜き加工等に
よって安価に製作することができる。なお、フィルタ１
３の素材は、摩耗金属粉のような微粒子を濾過して潤滑
油を透過することができ、且つ、潤滑油の圧力を受けて
も変形しない程度の保形性を備えた素材であればよい。As a material of the filter 13, a non-woven fabric such as polyester or polyamide is preferable, and if these materials are used, it can be manufactured at a low cost by punching a thin plate-shaped material. The filter 1
The material No. 3 may be any material that can filter fine particles such as abrasion metal powder and transmit the lubricating oil, and has a shape-retaining property that does not deform even under the pressure of the lubricating oil. .
【００２１】前記フィルタ１３は、貫通孔７の中径部７
Ｂに大径部７Ａ側から嵌挿され、中径部７Ｂと小径部７
Ｃとの間に形成されている環状の受面７Ｄにその一方の
面の外周近傍部分が当接され、他方の面の外周近傍部分
にモータ軸オイルシール１２の外周の端縁が当接されて
保持される。この際、前記受面７Ｄによって、フィルタ
１３側面は小径部７Ｃから僅かに離れて保持されるた
め、フィルタ１３の有効な濾過面積を広く確保すること
ができる。The filter 13 includes a medium diameter portion 7 of the through hole 7.
B is inserted from the large diameter portion 7A side, and the middle diameter portion 7B and the small diameter portion 7 are inserted.
C, an outer peripheral portion of one surface thereof is in contact with an annular receiving surface 7D, and an outer peripheral edge of the motor shaft oil seal 12 is in contact with an outer peripheral portion of the other surface. Is held. At this time, since the side surface of the filter 13 is held slightly away from the small diameter portion 7C by the receiving surface 7D, a wide effective filtration area of the filter 13 can be secured.
【００２２】前述した構成において、減速機部３のギヤ
ケース内には、内蔵する複数のギヤを潤滑する潤滑油
（潤滑油としてグリースを含む）が満たされており、前
記潤滑油は、フィルタ１３を透過してモータ軸オイルシ
ール１２とフィルタ１３との間にも入り込んでいる。In the above-described configuration, the gear case of the reduction gear unit 3 is filled with lubricating oil (including grease as lubricating oil) for lubricating a plurality of built-in gears. It penetrates and enters between the motor shaft oil seal 12 and the filter 13.
【００２３】ここで、モータ軸６が駆動されると、先端
のピニオン８によって従動ギヤ９が回転し、複数のギヤ
を介して出力軸１０が減速されて回転する。モータ軸６
の回転中は、減速機部３内からフィルタ１３を透過して
摩耗金属粉等の異物を濾過された清浄な潤滑油がモータ
軸オイルシール１２のリップ１２Ａとモータ軸６のリッ
プ当接部６Ｂとの間には入り込んで潤滑し、リップ１２
Ａの摩耗を防止している。Here, when the motor shaft 6 is driven, the driven gear 9 is rotated by the pinion 8 at the tip, and the output shaft 10 is decelerated and rotated via a plurality of gears. Motor shaft 6
During rotation of the motor, clean lubricating oil that has passed through the filter 13 from the reduction gear unit 3 and filtered out foreign matter such as abrasion metal powder is applied to the lip 12A of the motor shaft oil seal 12 and the lip contact portion 6B of the motor shaft 6. And lubricate the lip 12
A wear is prevented.
【００２４】次に、図２は、本発明の第２実施例を示す
ギヤモータの要部断面図であって、この実施例のギヤモ
ータは、フィルタ１３’を両側から一対の補強板１４で
挟み込んで補強している他は、前述した第１実施例と同
じ構成になっている。すなわち、前記一対の補強板１
４，１４は、フィルタ１３’と略同一の外径を有し、中
心部にモータ軸６が貫通するフィルタ１３’の孔１３’
Ａよりも大きな内径を有する孔１４Ａが形成され、薄く
剛性のある金属板で製作されている。FIG. 2 is a sectional view of a main part of a gear motor according to a second embodiment of the present invention. In the gear motor of this embodiment, a filter 13 'is sandwiched between a pair of reinforcing plates 14 from both sides. Except for reinforcement, it has the same configuration as the first embodiment described above. That is, the pair of reinforcing plates 1
Reference numerals 4 and 14 denote holes 13 ′ of the filter 13 ′ having substantially the same outer diameter as the filter 13 ′, and through which the motor shaft 6 passes through at the center.
A hole 14A having an inner diameter larger than A is formed, and is made of a thin and rigid metal plate.
【００２５】そして、フィルタ１３’を両側から挟んで
仕切壁５に形成された貫通孔７の中径部７Ｂ内に配置さ
れ、小径部７Ｃ側との間に形成されている環状の受面７
Ｄとモータ軸オイルシール１２の外周の端縁との間に挟
み込まれて固定されている。An annular receiving surface 7 is disposed in the middle diameter portion 7B of the through hole 7 formed in the partition wall 5 with the filter 13 'interposed therebetween from both sides, and formed between the through hole 7 and the small diameter portion 7C.
It is sandwiched and fixed between D and the outer peripheral edge of the motor shaft oil seal 12.
【００２６】一対の補強板１４，１４とフィルタ１３’
とが貫通孔７の中径部７Ｂ内に組み込まれた状態では、
それぞれの補強板１４の孔１４Ａの内周面とモータ軸６
のリップ当接部６Ｂ外周面との間の環状の隙間をフィル
タ１３’が遮蔽しており、減速機部３内の潤滑油は、前
記環状の隙間部分に露出しているフィルタ１３’を通っ
て、モータ軸オイルシール１２とフィルタ１３’との間
に流入できるようになっている。A pair of reinforcing plates 14, 14 and a filter 13 '
In the middle diameter portion 7B of the through hole 7,
The inner peripheral surface of the hole 14A of each reinforcing plate 14 and the motor shaft 6
The filter 13 'shields an annular gap between the outer peripheral surface of the lip contact portion 6B and the lubricating oil in the reduction gear unit 3 passes through the filter 13' exposed in the annular gap. Thus, the fluid can flow between the motor shaft oil seal 12 and the filter 13 '.
【００２７】本実施例では、フィルタ１３’に一対の補
強板１４，１４が両側から当接してその変形を抑えてい
るため、フィルタ１３’を薄くすることができ、貫通孔
７のモータ軸オイルシール保持部７Ｂの軸方向長を短く
できる。In this embodiment, since the pair of reinforcing plates 14 and 14 are in contact with the filter 13 ′ from both sides to suppress the deformation, the filter 13 ′ can be made thinner and the motor shaft oil in the through hole 7 can be reduced. The axial length of the seal holding portion 7B can be reduced.
【００２８】図２に示した実施例においては、減速機部
３側からモータ軸オイルシール１２側へは、補強板１４
の孔１４Ａ内周面とモータ軸６のリップ当接部６Ｂ外周
面との間の環状の隙間部分に露出しているフィルタ１
３’のみが潤滑油の流通及び濾過機能を有するが、補強
板にその剛性を損なわない範囲で、透孔やスリットを形
成することによって、潤滑油の有効な濾過面積が増加
し、フィルタの目詰まりを生じにくくすることができ
る。In the embodiment shown in FIG. 2, a reinforcing plate 14 is provided from the reduction gear section 3 side to the motor shaft oil seal 12 side.
Filter 1 exposed in an annular gap between the inner peripheral surface of the hole 14A and the outer peripheral surface of the lip contact portion 6B of the motor shaft 6.
Only 3 'has a lubricating oil distribution and filtration function, but by forming through-holes and slits in a range that does not impair the rigidity of the reinforcing plate, the effective filtration area of the lubricating oil increases and the filter Clogging can hardly occur.
【００２９】[0029]
【発明の効果】以上に説明したように、本発明のギヤモ
ータの軸封構造によれば、減速機部内でギヤどうしの噛
み合いによって生じた微細な金属粉等の異物が混入して
いる潤滑油がフィルタを通過する際に、前記異物が濾過
されてモータ軸オイルシールのリップとモータ軸との摺
動部が摩耗金属粉等の異物を含んでいない清浄な潤滑油
で潤滑されるため、リップの摩耗が抑制されてモータ軸
オイルシールの寿命を延長することができる。As described above, according to the shaft sealing structure of the gear motor of the present invention, the lubricating oil containing foreign matter, such as fine metal powder, generated by the meshing of the gears in the reduction gear section is removed. When passing through the filter, the foreign matter is filtered, and the sliding portion between the lip of the motor shaft oil seal and the motor shaft is lubricated with clean lubricating oil containing no foreign matter such as abrasion metal powder. Wear can be suppressed and the life of the motor shaft oil seal can be extended.
【００３０】また、フィルタは薄い板状素材から打ち抜
き加工等によって容易に製作することができ、前記フィ
ルタをモータ軸オイルシールの減速機部側に隣接して組
み込むだけの簡単な構造のため、低コストで実施するこ
とができるとともに、ギヤモータの全長を短く抑えるこ
とができ、従来のギヤモータに対して大幅な設計変更を
要さずに容易に組み込むことができる。さらに、薄板状
のフィルタを一対の補強板で補強することによって、薄
板状のフィルタが薄い場合でもその変形が防止され、摩
耗金属粉等の異物がモータ軸とモータ軸オイルシールと
の間に侵入することを確実に阻止することができる。The filter can be easily manufactured by punching a thin plate-shaped material or the like, and has a simple structure in which the filter is incorporated adjacent to the motor shaft oil seal on the side of the speed reducer. The present invention can be implemented at a low cost, and the total length of the gear motor can be reduced. Therefore, the gear motor can be easily incorporated into a conventional gear motor without requiring a significant design change. Further, by reinforcing the thin filter with a pair of reinforcing plates, even when the thin filter is thin, its deformation is prevented, and foreign matter such as abraded metal powder enters between the motor shaft and the motor shaft oil seal. Can be reliably prevented.
【図１】 本発明の第１実施例を示すギヤモータの要部
断面図。FIG. 1 is a sectional view of a main part of a gear motor according to a first embodiment of the present invention.
【図２】 本発明の第２実施例を示すギヤモータの要部
断面図。FIG. 2 is a sectional view of a main part of a gear motor according to a second embodiment of the present invention.
【図３】 一般的なギヤモータの構造を示す断面図。FIG. 3 is a sectional view showing a structure of a general gear motor.
【図４】 従来のギヤモータの軸封構造の一例を示す断
面図。FIG. 4 is a cross-sectional view showing an example of a shaft sealing structure of a conventional gear motor.
【図５】 従来のギヤモータの軸封構造の別の例を示す
断面図。FIG. 5 is a cross-sectional view showing another example of a shaft sealing structure of a conventional gear motor.
【図６】 従来のギヤモータの軸封構造のさらに別の例
を示す断面図。FIG. 6 is a sectional view showing still another example of the shaft sealing structure of the conventional gear motor.
１ ギヤモータ ２ モータ部 ３ 減速機部 ４ ギヤケー
ス ５ 仕切壁 ６ モータ軸 ６Ａ 軸受嵌合部 ６Ｂ リップ当
接部 ６Ｃ 軸端部 ７ 貫通孔 ７Ａ 大径部 ７Ｂ 中径部 ７Ｃ 小径部 ７Ｄ 受面 ８ ピニオン ９ 従動ギヤ １０ 出力軸 １１ 軸受 １２ モータ軸オイルシール １２Ａ リップ １３ フィルタ １３Ａ 孔 １４ 補強板 １４Ａ 孔DESCRIPTION OF SYMBOLS 1 Gear motor 2 Motor part 3 Reduction gear part 4 Gear case 5 Partition wall 6 Motor shaft 6A Bearing fitting part 6B Lip contact part 6C Shaft end part 7 Through hole 7A Large diameter part 7B Medium diameter part 7C Small diameter part 7D Receiving surface 8 Pinion Reference Signs List 9 driven gear 10 output shaft 11 bearing 12 motor shaft oil seal 12A lip 13 filter 13A hole 14 reinforcing plate 14A hole
Claims (2)
区画され、モータ軸が前記仕切壁に形成された貫通孔を
貫通してモータ軸先端のピニオンが減速機部内の従動ギ
ヤに噛合しているギヤモータにおいて、 前記貫通孔内に配置されたモータ軸オイルシールの減速
機部側に隣接して、中心部にモータ軸が挿通される孔を
有し、潤滑油の流通が可能で且つ減速機部側からモータ
軸オイルシール側への摩耗金属粉等の異物の侵入を阻止
する薄板状のフィルタを設けたことを特徴とするギヤモ
ータの軸封構造。A motor section and a reduction gear section are defined by a partition wall, and a motor shaft passes through a through hole formed in the partition wall, and a pinion at a tip end of the motor shaft meshes with a driven gear in the reduction gear section. In the gear motor, a hole through which a motor shaft is inserted is provided at a center portion of the motor shaft oil seal disposed in the through hole, adjacent to a speed reducer portion side, so that lubricating oil can be circulated and reduced in speed. A shaft seal structure for a gear motor, wherein a thin plate-shaped filter is provided for preventing foreign matter such as abrasion metal powder from entering a motor shaft oil seal side from a machine part side.
れている孔よりも大径の孔を中心部に有する一対の補強
板によって両側から挟まれて補強されていることを特徴
とする請求項１記載のギヤモータの軸封構造。2. The filter according to claim 1, wherein the filter is sandwiched from both sides by a pair of reinforcing plates having a hole having a larger diameter at a center than a hole formed at the center of the filter. The shaft sealing structure of the gear motor described in the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8264583A JPH10112952A (en) | 1996-10-04 | 1996-10-04 | Shaft sealing structure of gear motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8264583A JPH10112952A (en) | 1996-10-04 | 1996-10-04 | Shaft sealing structure of gear motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10112952A true JPH10112952A (en) | 1998-04-28 |
Family
ID=17405317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8264583A Pending JPH10112952A (en) | 1996-10-04 | 1996-10-04 | Shaft sealing structure of gear motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10112952A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001038759A1 (en) * | 1999-11-25 | 2001-05-31 | Zf Friedrichshafen Ag | Planetary gear for mounting on an electromotor |
| WO2002087727A1 (en) * | 2001-04-27 | 2002-11-07 | Toyo Roki Seizo Kabushiki Kaisha | Filtering medium of oil filter for automatic transmission |
| JP2006187076A (en) * | 2004-12-27 | 2006-07-13 | Matsushita Electric Ind Co Ltd | Output shaft waterproofing structure for waterproof motor |
| JP2006280122A (en) * | 2005-03-30 | 2006-10-12 | Hitachi Industrial Equipment Systems Co Ltd | Rotary electric machine with power transmission mechanism |
| JP2006283981A (en) * | 2006-07-07 | 2006-10-19 | Nabtesco Corp | Reduction gear |
| JP2007046653A (en) * | 2005-08-08 | 2007-02-22 | Tsubaki Emerson Co | Shaft seal part structure of gear reducer |
| JP2007154998A (en) * | 2005-12-05 | 2007-06-21 | Oriental Motor Co Ltd | Grease leakage prevention structure for geared electric motor |
| CN103075501A (en) * | 2013-01-14 | 2013-05-01 | 长治市潞安合力机械有限责任公司 | Driving speed reducer for self-lubricating monorail crane |
| CN103453123A (en) * | 2013-08-02 | 2013-12-18 | 浙江吉利汽车研究院有限公司 | Seal structure and seal ring with same |
| CN104675968A (en) * | 2013-11-26 | 2015-06-03 | 朱杏生 | Pumping unit speed reducer shaft head sealing structure |
| JP2016098944A (en) * | 2014-11-25 | 2016-05-30 | ナブテスコ株式会社 | Seal device and gear transmission device |
| KR101703614B1 (en) * | 2015-09-10 | 2017-02-07 | 현대자동차 주식회사 | Connecting structure of driving motor and reducer |
| JP2020128795A (en) * | 2019-02-08 | 2020-08-27 | ジヤトコ株式会社 | Power transmission device |
-
1996
- 1996-10-04 JP JP8264583A patent/JPH10112952A/en active Pending
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001038759A1 (en) * | 1999-11-25 | 2001-05-31 | Zf Friedrichshafen Ag | Planetary gear for mounting on an electromotor |
| US6824495B1 (en) | 1999-11-25 | 2004-11-30 | Zf Friedrichshafen Ag | Planetary gear for mounting on an electromotor |
| WO2002087727A1 (en) * | 2001-04-27 | 2002-11-07 | Toyo Roki Seizo Kabushiki Kaisha | Filtering medium of oil filter for automatic transmission |
| GB2391184A (en) * | 2001-04-27 | 2004-02-04 | Toyo Roki Seizo Kk | Filtering medium of oil filter for automatic transmission |
| GB2391184B (en) * | 2001-04-27 | 2005-08-31 | Toyo Roki Seizo Kk | Filtering medium of oil filter for automatic transmission |
| JP4654681B2 (en) * | 2004-12-27 | 2011-03-23 | パナソニック株式会社 | Waterproof structure of waterproof motor output shaft |
| JP2006187076A (en) * | 2004-12-27 | 2006-07-13 | Matsushita Electric Ind Co Ltd | Output shaft waterproofing structure for waterproof motor |
| JP2006280122A (en) * | 2005-03-30 | 2006-10-12 | Hitachi Industrial Equipment Systems Co Ltd | Rotary electric machine with power transmission mechanism |
| JP4718219B2 (en) * | 2005-03-30 | 2011-07-06 | 株式会社日立産機システム | Rotating electric machine with power transmission mechanism |
| JP2007046653A (en) * | 2005-08-08 | 2007-02-22 | Tsubaki Emerson Co | Shaft seal part structure of gear reducer |
| JP2007154998A (en) * | 2005-12-05 | 2007-06-21 | Oriental Motor Co Ltd | Grease leakage prevention structure for geared electric motor |
| JP2006283981A (en) * | 2006-07-07 | 2006-10-19 | Nabtesco Corp | Reduction gear |
| CN103075501A (en) * | 2013-01-14 | 2013-05-01 | 长治市潞安合力机械有限责任公司 | Driving speed reducer for self-lubricating monorail crane |
| CN103075501B (en) * | 2013-01-14 | 2015-08-26 | 长治市潞安合力机械有限责任公司 | Selflubricating monorail crane drives speed reducer |
| CN103453123A (en) * | 2013-08-02 | 2013-12-18 | 浙江吉利汽车研究院有限公司 | Seal structure and seal ring with same |
| CN104675968A (en) * | 2013-11-26 | 2015-06-03 | 朱杏生 | Pumping unit speed reducer shaft head sealing structure |
| JP2016098944A (en) * | 2014-11-25 | 2016-05-30 | ナブテスコ株式会社 | Seal device and gear transmission device |
| WO2016084595A1 (en) * | 2014-11-25 | 2016-06-02 | ナブテスコ株式会社 | Seal device and gear transmission device |
| CN107002857A (en) * | 2014-11-25 | 2017-08-01 | 纳博特斯克有限公司 | Sealing device and gear drive |
| KR101703614B1 (en) * | 2015-09-10 | 2017-02-07 | 현대자동차 주식회사 | Connecting structure of driving motor and reducer |
| JP2020128795A (en) * | 2019-02-08 | 2020-08-27 | ジヤトコ株式会社 | Power transmission device |
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