WO1995005699A1 - Shaft sealing device for an electric motor - Google Patents
Shaft sealing device for an electric motor Download PDFInfo
- Publication number
- WO1995005699A1 WO1995005699A1 PCT/JP1994/001343 JP9401343W WO9505699A1 WO 1995005699 A1 WO1995005699 A1 WO 1995005699A1 JP 9401343 W JP9401343 W JP 9401343W WO 9505699 A1 WO9505699 A1 WO 9505699A1
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- WIPO (PCT)
- Prior art keywords
- shaft
- rim
- electric motor
- sealing device
- stationary
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
- H02K5/124—Sealing of shafts
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
Definitions
- the present invention relates to an electric motor (hereinafter, simply referred to as a motor) generally used as a drive motor of a machine tool or the like, and in particular, to an axis for protecting the inside of the body from moisture and dust outside the body of the motor.
- the sealing function is a contact-type sealing function in the low-speed range of the motor, and a non-contact labyrinth-type sealing function in the high-speed range, so that it covers a wide range from the low-speed rotation range to the high-speed rotation range.
- the present invention relates to a shaft sealing device for a motor having a composite shaft sealing function capable of exerting a uniform sealing function across the entire shaft.
- the closest to the rotary bearing in the stator housing is recessed on the outer part of the metal frame, and the synthetic rubber material such as acrylic rubber, double rubber, fluorine rubber, etc. is sintered into the metal frame and fixed into the seal holding part.
- the structure was adopted to prevent foreign matter and contamination source liquid from entering from outside by fitting the oil seal to the surface and keeping the oil seal in contact with the surface of the rotating output shaft.
- the motor when the motor is used in the so-called high-speed rotation range, the motor rotates and non-rotates at the output shaft carrying the rotor at the center and the position immediately adjacent to the rotation bearing of the stay housing, respectively.
- it is effective to use a structure that prevents foreign matter and contamination source liquid from entering from outside during the rotation of the motor in the same labyrinth region.
- an object of the present invention is to provide an electric motor capable of reliably and uniformly generating a shaft sealing function particularly in a wide motor rotation range from a low-speed rotation range to a high-speed rotation range.
- the company does not provide a shaft sealing device.
- Another object of the present invention is to provide an electric motor capable of exhibiting a proper shaft sealing function from a high-speed rotation range to a low-speed rotation range and a stationary range of a motor while having a relatively small and compact structure.
- An object of the present invention is to provide a shaft sealing device for a motor.
- the present invention provides a contact seal at a low speed of a motor.
- stop means and non-contact labyrinth-type sealing means in the high-speed range, a uniform sealing action can be achieved over the entire stationary and low-to-high-speed rotation range of the motor.
- a sealing unit having a multiple sealing function is formed while being formed as a single unit that exerts its function, and this is provided in the shaft end region of the output shaft of the motor. is there.
- Lapince forming means formed by a rotating rim provided in a shaft end region of the output shaft and a stationary rim provided at an end of the stay housing opposed to the rotating rim;
- the weight means comprises a mass body embedded in the sealing means molded from the synthetic rubber material, and the mass body is a metal or resin material.
- the tongue-shaped seal portion of the sealing means comes into contact with the stationary rim of the labyrinth forming means to cut off communication between the outside of the motor and the inside of the motor.
- the tongue of the sealing means is separated from the stationary rim by centrifugal action and formed by the rotating rim and the stationary rim while preventing wear and heat generation.
- the labyrinth makes it possible to prevent foreign substances and liquids of pollution source from entering the motor from outside the motor.
- FIG. 1 is a partial cross-sectional view illustrating a shaft sealing function in a low-speed rotation state of an electric motor including a shaft sealing device according to the present invention
- Fig. 2 is a partial cross-sectional view illustrating the shaft sealing function of the electric motor in a high-speed rotation state.
- Fig. 3 is an enlarged view of part A in Fig. 1,
- Fig. 4 is an enlarged view of part B in Fig. 2,
- FIG.5A is a partial cross-sectional view showing another embodiment of the shaft sealing device according to the present invention.
- FIG. 5B is a cross-sectional view taken along arrow 5B—5B in FIG. 5A.
- FIG. 6 is a diagram showing the characteristics of the shaft sealing device for an electric motor according to the present invention.
- FIGS. 1 and 2 there is shown a cross-sectional view of a front half of an electric motor 10.
- the motor 10 has a cylindrical stator housing a stator winding 12.
- the bearing 14 has a bearing 14 and an end 14 of the housing 14, and the rotating bearing 16 (the front end of the front-rear pair) is seated on the bearing holder 14 a at the end of the housing 14.
- An output shaft 20 having a rotor 18 at the center is provided rotatably via a bearing.
- the shaft sealing device 30 includes the outer region of the bearing holding portion 14 a in the end region of the housing 14, and the shaft of the output shaft 20 opposed thereto. It is provided in the end region 20a.
- the coaxial sealing device 30 has a stationary rim 32 provided substantially integrally with the bearing holding portion 14a of the stator housing 14 as a stationary element.
- the stationary rim 32 has a disk portion 32a extending in the circumferential direction with respect to the rotation axis of the output shaft 20 and a cylindrical portion 32b extending in the radial direction with respect to the rotation axis of the output shaft 20.
- the cylindrical portion 32b has an annular outer surface with the outer peripheral surface of the shaft end region 20a of the output shaft 20. It is opposed to the inner end via an annular minute gap.
- a rotating rim 34 formed substantially integrally is provided in the shaft end region 20a of the output shaft 20.
- the rotating rim 34 is a disk portion 3 2 of the stationary rim 32. It is composed of an L-shaped member having a radial disk portion 34a substantially parallel to a and an annular portion 34b protruding in the axial direction from the outer peripheral area of the radial disk portion 34a.
- the outer peripheral surface of the part 34 b has an annular cylindrical minute gap between the outer peripheral surface of the stay housing 14 and the inner peripheral surface of the tip of the housing 14, and one part of the disk part 3 2 a of the stationary rim 32.
- An annular disk-shaped minute gap is formed at the part facing the part.
- the stationary rim 3 2 and the rotating rim 3 described above 4 forms the above-mentioned four small gaps around the shaft end of the output shaft 20, thereby forming a labyrinth, and the rotation speed of the output shaft 20 of the motor 10 reaches a high speed.
- an inner chamber (seal chamber) 36 surrounded by the stationary rim 32 and the rotating rim 34 of the shaft sealing device 30 described above has the same composition as a conventionally known oil seal element.
- a seal member 38 made of a rubber material is fixed.
- the seal member 38 has an annular base 38a and a tongue 38b, and is fixed to the annular portion 34b of the rotary rim 34 by the base 38a.
- the tongue-shaped portion 38b is directed toward the outer peripheral surface of the cylindrical portion 32b of the stationary rim 32 so as to form a substantially V shape from one end of the base 38a. It hangs down in a cantilever manner and is provided so that it can contact the outer peripheral surface.
- the tongue-shaped portion 38b of the sealing member 38 elastically engages with the cylindrical portion 32b of the stationary rim 32 when the motor 10 rotates at a low speed.
- the outside of the motor unit and the inside of the motor unit are isolated and sealed in the internal chamber 36 by contacting the outer peripheral surface.
- the tongue-shaped portion of the seal member 38 that rotates integrally is used.
- a centrifugal force acts on 38 b in proportion to the material density of the seal member 38, so that the tongue 38 b extends in the circumferential direction, and as a result, the motor rotation axis of the tongue 38 b
- the radius about the heart increases.
- the tongue portion 38b of the seal member 38 separates from the cylindrical portion 32b of the stationary rim 32 that was in contact during low-speed rotation. Therefore, the tongue 38b of the seal member does not contact the stationary rim 32 during high-speed rotation. Because it is maintained, there is no fear of heat generation or wear.
- the sealing function of the sealing member 38 is lost, but the above-described operation formed by the stationary rim 32 and the rotating rim 34 is performed.
- the high-speed rotation provides a sufficient sealing function and prevents dust, water, oil, etc. from entering the motor from outside the motor. .
- FIG. 3 is an enlarged view of a state in which the sealing member 38 of the shaft sealing device 30 performs a contact-type sealing operation in the low-speed rotation range of the motor.
- the sealing member 38 contacts the cylindrical portion 32b of the stationary rim 32 and reliably shuts off the outside of the motor 10 from the inside of the motor 10 in the internal chamber 36. Therefore, even when the motor stops rotating, the shaft is naturally sealed to prevent dust and water.
- the tongue-shaped portion 38b of the sealing member 38 is separated from the stationary rim 32 to maintain a non-contact state, while the labyrinth It can be understood that the shaft sealing action is achieved.
- FIGS.5A and 5B show another embodiment of the shaft sealing device 30 according to the present invention, and this embodiment is different from the above-described embodiments of FIGS.
- the mass 40 made of metal or an appropriate resin material is embedded in the tongue 38 b of the seal member 38 of the shaft seal device 30 to actively adjust and change the material density of the seal member 38.
- the boundary region with the ring type shaft seal can be adjusted to an appropriate speed point in consideration of the speed region of the practical motor.
- the mass of the mass body 40 itself is The experimental results were obtained in terms of the relationship between the switching speed from the shaft seal to the lip-shape seal, and the seal member 38 was formed at the stage of forming the seal member 38 with synthetic rubber. Embedded and enclosed in. Then, as shown in FIGS. 5A and 5B, the centrifugal force can be exerted by distributing and arranging at equal intervals around the circumference inside the tongue 38 b of the sealing member in advance during the molding process. Acts uniformly on the circumference, and it is possible to cause the separating action of the tongue 38b of the seal member 38 in the set rotation speed range. In Fig.
- the horizontal axis indicates the number of rotations of the motor 10 per unit time
- the vertical axis indicates the centrifugal force
- the seal member 38 of the shaft sealing device 30 according to the change in the number of rotations is stationary. It is a curve showing the situation where it is separated from the rim 32 side.
- the point P at points P, Q, and R on the curve is the rotation speed at which the labyrinth formed by the stationary rim 32 and the rotating rim 34 starts the shaft sealing function.
- the centrifugal force acting on the seal member 38 at that rotation speed is at a relatively low level, and the tongue portion 38b still shows the contact-type sealing function.
- the point Q is that the tongue 38b of the sealing member 38 of the shaft sealing device 30 gradually increases in centrifugal force as the rotation speed gradually increases, and the cylindrical portion 32 of the stationary rim 32. This indicates the point where the separation from b starts and therefore the contact-type sealing function is lost.
- point R is a permissible peripheral speed point at which the sealing function can be maintained if the sealing member 38 of the shaft sealing device 30 does not separate from the cylindrical portion 32 b of the stationary rim 32. Is shown.
- the rotational speed position Q at which the sealing member 38 deviates from the contact state with the stationary rim 32 is defined as the labyrinth sealing start speed point P and the permissible peripheral speed point of the sealing member 38.
- the rotational speed position at the point Q can be appropriately adjusted in consideration of the practical rotational speed of the motor.
- the shaft sealing device provided on the front side of the motor 10 is shown, but it goes without saying that a similar shaft sealing device is provided on the rear end side as well.
- the shaft sealing device for an electric motor when the motor is used for a drive motor of a machine tool, changes from a stationary state of zero rotation speed to machining by high-speed rotation.
- the oil-sealing contact-type sealing function and the labile-type non-contact sealing function function sequentially and in combination throughout the operation, so the waterproof and dustproof performance of the motor is highly reliable. It can be demonstrated under gender.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Sealing Devices (AREA)
- Sealing Of Bearings (AREA)
- Sealing With Elastic Sealing Lips (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
- Motor Or Generator Frames (AREA)
Abstract
A shaft sealing device for an electric motor provided at at least one end of an output shaft (20) of an electric motor (10) and at one end of a stator housing (14) confronting the one end of the output shaft, the shaft sealing device comprising a stationary rim (32) provided on the stator housing (14) and a rotary rim (34) provided in a shaft end area (20a) of the output shaft (20), and further comprising labyrinth means constituted by the two rims (32, 34) and sealing means provided rotatable together with the rotary rim (34) of the labyrinth means and comprising a bottom portion (38a) and a tongue-like portion (38b), wherein the shaft end is sealed by virtue of a contact sealing operation of the sealing means until the motor reaches a predetermined revolution speed, while in a speed range higher than the predetermined revolution speed the shaft end is sealed by virtue of a non-contact sealing operation of the labyrinth means, whereby uniform shaft sealing is effected over a wide range of motor conditions such as from stationary through low speed revolution to high speed revolution conditions by allowing both the contact and non-contact sealing operations to work in combination.
Description
明細書 Specification
電動モー タ のための軸封装置 技術分野 Shaft sealing device for electric motor
本発明は、 一般的には工作機械等の駆動モータ と して用い られる 電動モータ (以下、 単にモータ と言う ) に関し、 特に、 モータの機 体外に対して機体内部を水分や塵埃から防護する軸封機能をモータ の低速域では接触式の封止機能を、 また高速域では非接触のラ ビリ ンス式封止機能を呈する こ と によ っ て低速回転域から高速回転域ま での広範囲に渡って均一な封止機能を発揮する こ とができ る複合的 軸封機能を有したモータ用の軸封装置に関する。 The present invention relates to an electric motor (hereinafter, simply referred to as a motor) generally used as a drive motor of a machine tool or the like, and in particular, to an axis for protecting the inside of the body from moisture and dust outside the body of the motor. The sealing function is a contact-type sealing function in the low-speed range of the motor, and a non-contact labyrinth-type sealing function in the high-speed range, so that it covers a wide range from the low-speed rotation range to the high-speed rotation range. The present invention relates to a shaft sealing device for a motor having a composite shaft sealing function capable of exerting a uniform sealing function across the entire shaft.
背景技術 Background art
モータ に限る こ と な く 、 回転軸を有した回転機器において、 軸封 装置を設けて防水、 防塵を行う こ と は周知であ り、 特にモータ にお いて、 出力軸の両軸端領域に軸封装置を設け、 モータ機外からの塵 埃等の異物や工作機械現場等における加工液や潤滑油類等の液体が モータ機体内部の軸受内部や狭域領域に侵入してモータ の機械的ま た電気的機能を劣化させるこ とを防止するよう に している く こ とは 周知である。 It is well-known that not only motors but also rotary equipment with rotating shafts are provided with shaft seals to provide waterproofing and dustproofing. A shaft sealing device is provided, and foreign matter such as dust from the outside of the motor machine and liquid such as machining fluid and lubricating oil at the machine tool site enter the inside of the bearing inside the motor body or a narrow area, and the mechanical It is well known that electrical functions are prevented from deteriorating.
従来のモータにおける軸封装置と しては、 出力軸が 5 , 000 r . p . m 程度までの比較的低速域で回転するモータ の場合には、 ステー タ ハ ウ ジ ングにおける回転軸受の直近の外側部位にシール保持部を凹設 し、 この シール保持部にァ ク リ ノレゴム、 二 ト リ ノレゴム、 フ ッ 素ゴム 等の合成ゴム材を金属枠体に焼結、 固定したオイ ルシールを押込み 式に嵌着し、 同オイ ルシールを回転する出力軸の表面に接触維持す る こ と によ って外部からの異物、 汚染源液体の侵入を防ぐ構造がと られていた。
他方、 モータが所謂、 高速回転域で使用される場合には、 モ一夕 ロータを中央部に担持した出力軸と ステ一夕ハウ ジ ングの回転軸受 の直近位置と に夫々、 回転及び非回転の 1 対の金属プロ ッ ク形状体 を取着、.または一体形成で設け、 両ブロ ッ ク形状体によ り迷路状の 隙間を設け、 周知のラ ビ リ ンスを形成して非接触状態のま ま、 モー 夕の回転中における外部からの異物、 汚染源液体の侵入を、 同ラ ビ リ ンス域で阻止する構造が有効である。 As a shaft sealing device for a conventional motor, in the case of a motor whose output shaft rotates at a relatively low speed range of up to 5,000 rpm, the closest to the rotary bearing in the stator housing The seal holding part is recessed on the outer part of the metal frame, and the synthetic rubber material such as acrylic rubber, double rubber, fluorine rubber, etc. is sintered into the metal frame and fixed into the seal holding part. The structure was adopted to prevent foreign matter and contamination source liquid from entering from outside by fitting the oil seal to the surface and keeping the oil seal in contact with the surface of the rotating output shaft. On the other hand, when the motor is used in the so-called high-speed rotation range, the motor rotates and non-rotates at the output shaft carrying the rotor at the center and the position immediately adjacent to the rotation bearing of the stay housing, respectively. Attach a pair of metal block-shaped bodies, or provide them integrally, and provide a labyrinth-shaped gap with both block-shaped bodies to form a well-known labyrinth in a non-contact state In addition, it is effective to use a structure that prevents foreign matter and contamination source liquid from entering from outside during the rotation of the motor in the same labyrinth region.
然しながら、 前者のオイルシールを用いた軸封装置は、 高速回転 モータに適用する と、 オイルシールが回転出力軸に接触する リ ッ プ 部において摩擦熱による発熱でオイルシールの封止特性が経時劣化 したり、 摩耗による封止機能の劣化も発生し、 耐用性が著し く 低く なって、 実用性に欠ける問題がある。 However, if the former shaft seal device using an oil seal is applied to a high-speed rotating motor, the sealing characteristics of the oil seal deteriorate with time due to heat generated by frictional heat at the lip where the oil seal contacts the rotary output shaft. In addition, there is a problem that the sealing function is deteriorated due to wear and wear, and the durability is remarkably reduced, and the practicability is poor.
他方、 後者のラ ビ リ ンスを用いた軸封装置は、 1 対のブロ ッ ク形 状体が非接触式に設け られる こ とから、 高速回転時にはラ ビリ ンス を通過する侵入物を防止して良く 軸封機能を発揮する反面、 モータ の静止時やモータが低速回転域で使用される場合には封止機能を発 揮できない欠点を備えている。 On the other hand, the latter shaft seal device using labyrinth prevents intrusion through the labyrinth during high-speed rotation because a pair of block-shaped members are provided in a non-contact manner. While the shaft sealing function can be demonstrated, it has the disadvantage that the sealing function cannot be performed when the motor is stationary or when the motor is used in a low-speed rotation range.
発明の開示 Disclosure of the invention
依って、 本発明の目的は、 特に、 低速回転域から高速回転域に渡 る広いモー タ の回転領域において、 確実に、 かつ均一に軸封機能を 発生する こ とが可能な電動モータ用の軸封装置を提供せんとする も のである。 Accordingly, an object of the present invention is to provide an electric motor capable of reliably and uniformly generating a shaft sealing function particularly in a wide motor rotation range from a low-speed rotation range to a high-speed rotation range. The company does not provide a shaft sealing device.
本発明の他の目的は、 比較的小型でコ ンパク 卜な構造を有しなが らモー タ の高速回転域から低速回転域および静止域まで適正な軸封 機能を呈する こ とが可能な電動モータ用の軸封装置を提供する こ と にある。 Another object of the present invention is to provide an electric motor capable of exhibiting a proper shaft sealing function from a high-speed rotation range to a low-speed rotation range and a stationary range of a motor while having a relatively small and compact structure. An object of the present invention is to provide a shaft sealing device for a motor.
本発明は、 上述の目的に鑑みて、 モー タ の低速域では、 接触式封
止手段を形成し、 高速域では非接触のラ ビ リ ンス式封止手段を形成 する こ と によ り 、 モー タ の静止及び低→高速回転域の全般に渡って 均一な封止作用を発揮する単一ュニ ッ ト と して形成されながら、 複 合的な封止機能を有する封止手段を構成し、 これをモー タ の出力軸 の軸端領域に設けるよ う に したものである。 In view of the above-mentioned object, the present invention provides a contact seal at a low speed of a motor. By forming stop means and non-contact labyrinth-type sealing means in the high-speed range, a uniform sealing action can be achieved over the entire stationary and low-to-high-speed rotation range of the motor. A sealing unit having a multiple sealing function is formed while being formed as a single unit that exerts its function, and this is provided in the shaft end region of the output shaft of the motor. is there.
すなわち、 本発明によれば、 電動モー タ のステ一夕ハウ ジ ングと 回転性出力軸の少な く と も一方の軸端領域との間に設け られる軸封 装置において、 That is, according to the present invention, in a shaft sealing device provided between the housing of the electric motor and at least one shaft end region of the rotary output shaft,
前記出力軸の軸端領域に設けた回転リ ム と該回転リ ムに対向する 前記ステ一夕ハウ ジ ングの端部に設け られた静止リ ム とから形成さ れるラ ピリ ンス形成手段と、 Lapince forming means formed by a rotating rim provided in a shaft end region of the output shaft and a stationary rim provided at an end of the stay housing opposed to the rotating rim;
前記ラ ピリ ンス形成手段の前記回転リ ムと静止リ ムとの間に形成 され、 前記出力軸の軸端領域の周上に配設される環状シール室と、 前記環状シール室内に格納され、 かつ前記回転リ ム又は出力軸に 一体に止着された基底部と前記静止リ ムに静止速度から所定の回転 速度まで接触して前記ステ一夕ハウ ジング内部を封止する と共に前 記所定の回転速度を越える高回転速度域で前記静止リ ムから遠心作 用的に離反する舌状シール部とを有したシール手段と、 An annular seal chamber formed between the rotating rim and the stationary rim of the lapilis forming means and disposed on a periphery of a shaft end region of the output shaft, and housed in the annular seal chamber; And contacting the stationary rim and the base fixed to the rotating rim or the output shaft integrally with the stationary rim from a stationary speed to a predetermined rotational speed to seal the interior of the stay housing and the predetermined A sealing means having a tongue-shaped seal portion which is centrifugally separated from the stationary rim in a high rotation speed region exceeding the rotation speed;
を具備 して構成される電動モー タ のための軸封装置が提供される。 好ま し く は、 上述したラ ビ リ ンス形成手段の前記回転リ ムは前記 出力軸と一体に形成された断面 L字形を有した第 1 の環状部材から 成り、 また、)前記ラ ビリ ンス形成手段の静止リ ムは前記ステ一夕ハ ウ ジ ングと一体に形成された断面 L字形を有した第 2 の環状部材か ら成り、 該第 1 、 第 2 の L字形環伏部材の間に前記環状シール室を 形成する。 A shaft sealing device for an electric motor comprising: Preferably, the rotating rim of the above-mentioned labyrinth forming means comprises a first annular member having an L-shaped cross section formed integrally with the output shaft, and the labyrinth forming means. The stationary rim of the means comprises a second annular member having an L-shaped cross section formed integrally with the stay housing, and between the first and second L-shaped annular members. The annular seal chamber is formed.
また、 好ま し く は、 前記基底部と前記舌状シール部とを備えたシ —ル手段は、 合成ゴム材料から形成された成形部材である。
好ま し く は、 上記シール手段の舌状シール部には、 前記出力軸が 所定の回転速度域に達 したと き、 遠心作用によ り前記静止リ ムから の離反作用を促進する錘手段が内蔵させ、 以て該舌状部の離反作用 を調節するよ う に構成しても良い。 Preferably, the sealing means provided with the base portion and the tongue-shaped seal portion is a molded member formed of a synthetic rubber material. Preferably, the tongue-shaped seal portion of the sealing means has a weight means for promoting a separating action from the stationary rim by centrifugal action when the output shaft reaches a predetermined rotation speed range. It may be configured to be built-in, so that the separating action of the tongue is adjusted.
好ま し く は、 上記の錘手段は、 前記合成ゴム材料から成形された 前記シール手段の内部に埋め込まれた質量体から成り、 該質量体は 金属又は樹脂材料である。 Preferably, the weight means comprises a mass body embedded in the sealing means molded from the synthetic rubber material, and the mass body is a metal or resin material.
上述の構成によれば、 モー タの低速度領域では、 シール手段の舌 状シール部が、 ラ ビリ ンス形成手段の静止リ ムに接触してモータの 機外とモータの機内の連通を遮断、 封止し、 また高回転領域では、 シール手段の舌状部が遠心作用で上記静止リ ムから離反して摩耗、 発熱を防止しながら、 該回転リ ムと静止リ ムとによ り形成されるラ ビリ ンス に依ってモータの機外から機内への異物や汚染源液体の侵 入阻止を図る こ とが可能となる。 According to the above configuration, in the low-speed region of the motor, the tongue-shaped seal portion of the sealing means comes into contact with the stationary rim of the labyrinth forming means to cut off communication between the outside of the motor and the inside of the motor. In the high rotation region, the tongue of the sealing means is separated from the stationary rim by centrifugal action and formed by the rotating rim and the stationary rim while preventing wear and heat generation. The labyrinth makes it possible to prevent foreign substances and liquids of pollution source from entering the motor from outside the motor.
図面の簡単な説明 BRIEF DESCRIPTION OF THE FIGURES
本発明の上述およびその他目的、 特徴、 利点を添付図面を参照し て更に明らかにするが、 図面において、 The above and other objects, features, and advantages of the present invention will be further clarified with reference to the accompanying drawings.
図 1 は、 本発明に係る軸封装置を備えた電動モータ の低速回転状 態における軸封機能を図示した部分断面図、 FIG. 1 is a partial cross-sectional view illustrating a shaft sealing function in a low-speed rotation state of an electric motor including a shaft sealing device according to the present invention,
図 2 は、 同電動モータ の高速回転状態における軸封機能を図示 し た部分断面図、 Fig. 2 is a partial cross-sectional view illustrating the shaft sealing function of the electric motor in a high-speed rotation state.
図 3 は、 図 1 の A部分の拡大図、 Fig. 3 is an enlarged view of part A in Fig. 1,
図 4 は、 図 2 の B部分の拡大図、 Fig. 4 is an enlarged view of part B in Fig. 2,
図 5 Aは、 本発明に係る軸封装置の他の実施例を示した部分断面 図、 FIG.5A is a partial cross-sectional view showing another embodiment of the shaft sealing device according to the present invention,
図 5 B は、 図 5 Aの矢視 5 B — 5 B による断面図、 FIG. 5B is a cross-sectional view taken along arrow 5B—5B in FIG. 5A.
図 6 は、 本発明に係る電動モータ用の軸封装置の特性を示すダラ
フ 図であ る。 FIG. 6 is a diagram showing the characteristics of the shaft sealing device for an electric motor according to the present invention. FIG.
発明を実施するための最良の態様 BEST MODE FOR CARRYING OUT THE INVENTION
図 1 及び図 2 を参照する と、 電動モータ 1 0 の前方の半体部分の 断面図が図示されており、 同モータ 1 0 は、 ステータ卷線 1 2 を収 納 した円筒形状のステ一 タノ、ウ ジ ング 1 4 を有し、 こ のステー タノ、 ウ ジ ング 1 4 の端部の軸受保持部 1 4 a に着座、 保持された回転軸 受 1 6 (前後 1 対の中の前方の軸受) を介してロータ 1 8 を中央部 に備えた出力軸 2 0 が回転可能に設け られている。 Referring to FIGS. 1 and 2, there is shown a cross-sectional view of a front half of an electric motor 10. The motor 10 has a cylindrical stator housing a stator winding 12. The bearing 14 has a bearing 14 and an end 14 of the housing 14, and the rotating bearing 16 (the front end of the front-rear pair) is seated on the bearing holder 14 a at the end of the housing 14. An output shaft 20 having a rotor 18 at the center is provided rotatably via a bearing.
こ こで、 本発明によれば、 軸封装置 3 0 がステ一夕ハウ ジ ング 1 4 の端部領域における上記軸受保持部 1 4 aの外側領域と、 それに 対向 した出力軸 2 0 の軸端領域 2 0 a に設け られている。 Here, according to the present invention, the shaft sealing device 30 includes the outer region of the bearing holding portion 14 a in the end region of the housing 14, and the shaft of the output shaft 20 opposed thereto. It is provided in the end region 20a.
こ こで、 同軸封装置 3 0 は、 静止要素であるステ一タハウ ジ ング 1 4 の軸受保持部 1 4 a の領域に実質的に一体形成で設けた静止リ ム 3 2 を有し、 この静止リ ム 3 2 は出力軸 2 0 の回転軸線に対して 周方向に延びる円板部 3 2 a と出力軸 2 0 の回転軸線に対してラ ジ アル方向に延びた筒状部 3 2 b とを有した断面が L字形部材から成 り、 同筒状部 3 2 bが出力軸 2 0 の軸端領域 2 0 a の外周面と環状 微小空隙を介し、 また、 後述の回転リ ムの内端部と環状微小空隙を 介 して対設されている。 Here, the coaxial sealing device 30 has a stationary rim 32 provided substantially integrally with the bearing holding portion 14a of the stator housing 14 as a stationary element. The stationary rim 32 has a disk portion 32a extending in the circumferential direction with respect to the rotation axis of the output shaft 20 and a cylindrical portion 32b extending in the radial direction with respect to the rotation axis of the output shaft 20. The cylindrical portion 32b has an annular outer surface with the outer peripheral surface of the shaft end region 20a of the output shaft 20. It is opposed to the inner end via an annular minute gap.
他方、 出力軸 2 0 の軸端領域 2 0 a には実質的に一体形成された 回転リ ム 3 4 が設け られ、 同回転リ ム 3 4 は上記静止リ ム 3 2 の円 板部 3 2 a と略平行なラ ジアル円板部 3 4 a とそのラ ジアル円板部 3 4 a の外周域から軸方向に突出 した環状部 3 4 b とを備えた断面 L字形の部材から成り、 環状部 3 4 bの外周面がステ一夕ハウ ジ ン グ 1 4 の先端の内周面との間に環状円筒形の微小空隙を、 また静止 リ ム 3 2 の円板部 3 2 a の一部との対向部位には環状円板形の微小 空隙を形成している。 つま り、 上述した静止リ ム 3 2 と回転 リ ム 3
4 と によって出力軸 2 0 の軸端の周囲に上記の 4 つの微小空隙を形 成し、 それに依ってラ ビリ ンスを形成し、 モータ 1 0 の出力軸 2 0 の回転速度が高速度に達する と、 モータ機体の外部からステータハ ウ ジ ング 1 4 の内部や回転軸受 1 6 に向けて侵入する塵埃や周囲の モータ使用環境から侵入の危惧がある水分や油分をシ ャ ツ ト ァゥ ト し、 防塵、 防水の両機能を果たす。 On the other hand, a rotating rim 34 formed substantially integrally is provided in the shaft end region 20a of the output shaft 20. The rotating rim 34 is a disk portion 3 2 of the stationary rim 32. It is composed of an L-shaped member having a radial disk portion 34a substantially parallel to a and an annular portion 34b protruding in the axial direction from the outer peripheral area of the radial disk portion 34a. The outer peripheral surface of the part 34 b has an annular cylindrical minute gap between the outer peripheral surface of the stay housing 14 and the inner peripheral surface of the tip of the housing 14, and one part of the disk part 3 2 a of the stationary rim 32. An annular disk-shaped minute gap is formed at the part facing the part. That is, the stationary rim 3 2 and the rotating rim 3 described above 4 forms the above-mentioned four small gaps around the shaft end of the output shaft 20, thereby forming a labyrinth, and the rotation speed of the output shaft 20 of the motor 10 reaches a high speed. And dust that enters from inside the motor housing toward the interior of the stator housing 14 and the rotary bearing 16, and moisture and oil that can be intruded by the surrounding motor operating environment. Performs both dustproof and waterproof functions.
また、 上記の軸封装置 3 0 の静止リ ム 3 2 と回転リ ム 3 4 と によ つて包囲された内部室 (シール室) 3 6 には、 従来周知のオイルシ ール要素と同様な合成ゴム材から成る シール部材 3 8 が止着されて いる。 このシール部材 3 8 は、 円環状の基部 3 8 a と舌状部 3 8 b とを有し、 基部 3 8 a によって回転リ ム 3 4 の環状部 3 4 b に定着 されて同回転リ ム 3 4 と一体回転可能に設け られ、 舌状部 3 8 b は 基部 3 8 a の一端から略 V字を形成するよう に静止リ ム 3 2 の筒状 部 3 2 bの外周面に向けて片持ち梁方式に垂下し、 同外周面に接触 可能に設け られている。 In addition, an inner chamber (seal chamber) 36 surrounded by the stationary rim 32 and the rotating rim 34 of the shaft sealing device 30 described above has the same composition as a conventionally known oil seal element. A seal member 38 made of a rubber material is fixed. The seal member 38 has an annular base 38a and a tongue 38b, and is fixed to the annular portion 34b of the rotary rim 34 by the base 38a. The tongue-shaped portion 38b is directed toward the outer peripheral surface of the cylindrical portion 32b of the stationary rim 32 so as to form a substantially V shape from one end of the base 38a. It hangs down in a cantilever manner and is provided so that it can contact the outer peripheral surface.
こ こで、 シール部材 3 8 の舌状部 3 8 b は、 図 1 に明示するよ う に、 モータ 1 0 の低速回転時には、 弾性的に静止リ ム 3 2 の筒状部 3 2 b の外周面に接触して内部室 3 6 内でモータ機外とモータ機内 とを隔絶、 封止している。 As shown in FIG. 1, the tongue-shaped portion 38b of the sealing member 38 elastically engages with the cylindrical portion 32b of the stationary rim 32 when the motor 10 rotates at a low speed. The outside of the motor unit and the inside of the motor unit are isolated and sealed in the internal chamber 36 by contacting the outer peripheral surface.
そ して、 図 2 に示すよ う に、 モータ 1 0 の出力軸 2 0 が所定の回 転速度を越える高速域に達すると、 一体となって回転する上記シー ル部材 3 8 の舌状部 3 8 b に同シール部材 38の材料密度に比例 した 遠心力が作用 し、 故に、 同舌状部 3 8 bが周方向に伸長して、 その 結果、 舌状部 3 8 b のモータ回転軸心に関する半径が拡大する。 こ の結果、 低速回転時にシール部材 3 8 の舌状部 3 8 bが接触してい た静止リ ム 3 2 の筒状部 3 2 bから離反する。 従って、 同シール部 材の舌状部 3 8 b は、 高速回転中には静止リ ム 3 2 に非接触状態に
維持されるため、 発熱や摩耗の危惧がない状態に維持されるのであ る。 Then, as shown in FIG. 2, when the output shaft 20 of the motor 10 reaches a high-speed region exceeding a predetermined rotation speed, the tongue-shaped portion of the seal member 38 that rotates integrally is used. A centrifugal force acts on 38 b in proportion to the material density of the seal member 38, so that the tongue 38 b extends in the circumferential direction, and as a result, the motor rotation axis of the tongue 38 b The radius about the heart increases. As a result, the tongue portion 38b of the seal member 38 separates from the cylindrical portion 32b of the stationary rim 32 that was in contact during low-speed rotation. Therefore, the tongue 38b of the seal member does not contact the stationary rim 32 during high-speed rotation. Because it is maintained, there is no fear of heat generation or wear.
こ のよ う に、 モータ 1 0 が高速回転域で回転中には、 シール部材 3 8 の封止作用は喪失されるが、 静止リ ム 3 2 と回転 リ ム 3 4 とで 形成された上述の 4 つの微小環状空隙から成るラ ビリ ン スにおいて は、 高速回転によ り充分な封止機能を発揮し、 モータ機外からモー タ機内への塵埃や水、 油等の侵入が防止される。 As described above, while the motor 10 is rotating in the high-speed rotation range, the sealing function of the sealing member 38 is lost, but the above-described operation formed by the stationary rim 32 and the rotating rim 34 is performed. In the labyrinth consisting of the four small annular gaps, the high-speed rotation provides a sufficient sealing function and prevents dust, water, oil, etc. from entering the motor from outside the motor. .
図 3 は、 軸封装置 3 0 の シール部材 3 8 がモータ の低速回転域で 接触式に封止作用を している状態を拡大して図示している。 このよ う に、 シール部材 3 8 が静止リ ム 3 2 の筒状部 3 2 b に接触して内 部室 3 6 で確実にモータ 1 0 の機体外と機体内とを遮断している こ とから、 モータの回転停止時にも、 当然に軸封がなされ、 防塵、 防 水を行う。 FIG. 3 is an enlarged view of a state in which the sealing member 38 of the shaft sealing device 30 performs a contact-type sealing operation in the low-speed rotation range of the motor. In this way, the sealing member 38 contacts the cylindrical portion 32b of the stationary rim 32 and reliably shuts off the outside of the motor 10 from the inside of the motor 10 in the internal chamber 36. Therefore, even when the motor stops rotating, the shaft is naturally sealed to prevent dust and water.
また、 図 4 からは、 高速回転域のおいて、 シール部材 3 8 の舌状 部 3 8 bが静止リ ム 3 2 から離反して非接触状態を維持し、 他方、 その間に、 ラ ビリ ンスによる軸封作用が達成される こ とが理解でき る。 Also, from FIG. 4, in the high-speed rotation range, the tongue-shaped portion 38b of the sealing member 38 is separated from the stationary rim 32 to maintain a non-contact state, while the labyrinth It can be understood that the shaft sealing action is achieved.
図 5 A、 図 5 B は、 本発明に係る軸封装置 ·3 0 の他の実施例を示 しており、 こ の実施例が前述の図 1 〜図.4 の実施例と異なる点は、 軸封装置 3 0 のシール部材 3 8 における舌状部 3 8 bの内部に金属 や適宜の樹脂材から成る質量体 4 0 を埋め込み、 シール部材 3 8 の 材料密度を積極的に調節、 変化させて高速回転時における舌状部 3 8 b に作用する遠心力効果を調節する こ と によ り 、 モータ 1 0 の回 転における低速回転と高速回転とにおける接触式軸封と非接触ラ ビ リ ン ス式軸封との境界領域を実用モータ の速度領域を鑑みて適正な 速度点に調節 し得るよ う に したものである。 FIGS.5A and 5B show another embodiment of the shaft sealing device 30 according to the present invention, and this embodiment is different from the above-described embodiments of FIGS. The mass 40 made of metal or an appropriate resin material is embedded in the tongue 38 b of the seal member 38 of the shaft seal device 30 to actively adjust and change the material density of the seal member 38. By adjusting the effect of the centrifugal force acting on the tongue 38b at the time of high-speed rotation, the contact-type shaft seal and the non-contact rubber at the low-speed rotation and high-speed rotation of the motor 10 are rotated. The boundary region with the ring type shaft seal can be adjusted to an appropriate speed point in consideration of the speed region of the practical motor.
この場合において、 質量体 4 0 自体の質量は、 予め、 上記の接触
式軸封からラ ピリ ンス式軸封への切り換り速度との対応関係におい て実験的に求め、 シール部材 3 8 を合成ゴム材によ って成形加工す る段階で、 シール部材 3 8 内に埋め込み封入する。 そ して、 図 5 A および図 5 B に図示のごと く 、 成形過程で予めシール部材の舌状部 3 8 b の内部において、 円周上に均等間隔で分配、 配置すれば、 遠 心力作用が周上で均等に作用 して、 シール部材 3 8 の舌状部 3 8 b の離反作用を設定した回転速度域で生起させる こ とが可能となる。 図 6 は、 横軸にモータ 1 0 の単位時間当たりの回転数をと り、 縦 軸に遠心力をと り、 回転数の変化に応じた軸封装置 3 0 のシール部 材 3 8 が静止リ ム 3 2 側から離反する状況を示した曲線である。 In this case, the mass of the mass body 40 itself is The experimental results were obtained in terms of the relationship between the switching speed from the shaft seal to the lip-shape seal, and the seal member 38 was formed at the stage of forming the seal member 38 with synthetic rubber. Embedded and enclosed in. Then, as shown in FIGS. 5A and 5B, the centrifugal force can be exerted by distributing and arranging at equal intervals around the circumference inside the tongue 38 b of the sealing member in advance during the molding process. Acts uniformly on the circumference, and it is possible to cause the separating action of the tongue 38b of the seal member 38 in the set rotation speed range. In Fig. 6, the horizontal axis indicates the number of rotations of the motor 10 per unit time, the vertical axis indicates the centrifugal force, and the seal member 38 of the shaft sealing device 30 according to the change in the number of rotations is stationary. It is a curve showing the situation where it is separated from the rim 32 side.
同図 6 において、 曲線上の点 P , Q , Rにおける点 P は、 静止リ ム 3 2 と回転リ ム 3 4 によ り形成されるラ ビリ ンスが軸封機能を開 始する回転数と、 その回転数においてシール部材 3 8 に作用する遠 心力が比較的低レベルにあり、 舌状部 3 8 b は依然、 接触式封止機 能を発揮している状態を示している。 In FIG. 6, the point P at points P, Q, and R on the curve is the rotation speed at which the labyrinth formed by the stationary rim 32 and the rotating rim 34 starts the shaft sealing function. However, the centrifugal force acting on the seal member 38 at that rotation speed is at a relatively low level, and the tongue portion 38b still shows the contact-type sealing function.
また、 点 Qは、 軸封装置 3 0 のシール部材 3 8 における舌状部 3 8 bが回転数の漸増に伴う遠心力の漸増によ り、 静止リ ム 3 2 の筒 状部 3 2. bから離反を開始し、 故に、 接触式封止機能が失われる地 点を示している。 The point Q is that the tongue 38b of the sealing member 38 of the shaft sealing device 30 gradually increases in centrifugal force as the rotation speed gradually increases, and the cylindrical portion 32 of the stationary rim 32. This indicates the point where the separation from b starts and therefore the contact-type sealing function is lost.
更に、 点 Rは、 軸封装置 3 0 の シール部材 3 8 が静止リ ム 3 2 の 筒状部 3 2 bから離反しなかった場合に封止機能を保持でき る限界 の許容周速度点を示している。 Further, point R is a permissible peripheral speed point at which the sealing function can be maintained if the sealing member 38 of the shaft sealing device 30 does not separate from the cylindrical portion 32 b of the stationary rim 32. Is shown.
本発明においては、 シール部材 3 8 が静止リ ム 3 2 との接触状態 から逸脱する回転数位置 Qを、 ラ ビリ ンス封止の開始速度点 P と シ 一ル部材 3 8 の許容周速度点 Rとの間に設定する こ とによ り、 電動 モータ 1 0 が回転静止状態から高速度回転域に渡る広い速度域で用 いられた場合に も軸封装置 3 0 のシール部材 3 8 による接触式封止
と ラ ビリ ンスによる非接触ラ ビ リ ンス式封止が順次に作用 してモー タ機体外に対してモータ機体内の防塵、 防水を達成する こ とができ る。 In the present invention, the rotational speed position Q at which the sealing member 38 deviates from the contact state with the stationary rim 32 is defined as the labyrinth sealing start speed point P and the permissible peripheral speed point of the sealing member 38. By setting the distance between R and R, even when the electric motor 10 is used in a wide speed range from a stationary rotation state to a high-speed rotation range, the seal member 38 of the shaft sealing device 30 is used. Contact type sealing The non-contact labyrinth-type sealing with the labyrinth and the labyrinth acts sequentially to achieve dustproof and waterproof inside the motor body from outside the motor body.
図 6 から明らかなよ う に、 接触式封止と非接触式封止による軸封 機能が点 P と Q との間で重複的に作用 している こ と によ り、 封止機 能の中断時期がな く 、 依って、 信頼性の高い軸封装置を構成し得る のである。 As is evident from Fig. 6, the shaft sealing function of the contact-type sealing and the non-contact-type sealing is acting redundantly between the points P and Q. Since there is no interruption time, a highly reliable shaft sealing device can be configured.
なお、 図 5 A、 図 5 B に示した実施例では、 点 Qの回転数位置を モータの実用回転数を考慮して適宜に調節可能にする ものである。 また、 図示においては、 モータ 1 0 の前方側に設け られた軸封装置 を示 したが、 後端側にも同じ く 同様な軸封装置が設け られている こ と は言う までもない。 In the embodiment shown in FIGS. 5A and 5B, the rotational speed position at the point Q can be appropriately adjusted in consideration of the practical rotational speed of the motor. Also, in the figure, the shaft sealing device provided on the front side of the motor 10 is shown, but it goes without saying that a similar shaft sealing device is provided on the rear end side as well.
以上の説明から明らかなよ う に、 本発明による電動モータのため の軸封装置は、 同モータが工作機械の駆動モータ等に用いたと き、 回転速度零の静止状態から、 高速回転による機械加工作用時に渡つ て常に、 オイルシール型の接触式封止作用と ラ ビ リ ンス型の非接触 封止作用が順次に、 かつ、 複合的に機能するので、 モータに対する 防水、 防塵性能を高信頼性の下で発揮する こ とができ る。 As is clear from the above description, the shaft sealing device for an electric motor according to the present invention, when the motor is used for a drive motor of a machine tool, changes from a stationary state of zero rotation speed to machining by high-speed rotation. The oil-sealing contact-type sealing function and the labile-type non-contact sealing function function sequentially and in combination throughout the operation, so the waterproof and dustproof performance of the motor is highly reliable. It can be demonstrated under gender.
従って、 モータの寿命を延命化する こ とが可能である と共に、 各 電動モータの適用々途を拡張する こ と も可能となる。
Therefore, it is possible to extend the life of the motor and to extend the application of each electric motor.
Claims
1. 電動モー タ のステ一タハウ ジ ングと回転性出力軸の軸端領 域との間に設け られる軸封装置において、 1. In a shaft sealing device provided between the stator housing of the electric motor and the shaft end area of the rotary output shaft,
前記出力軸の少な く と も一方の軸端領域に設けた回転リ ムと該回 転リ ムに対向する前記ステ一夕ハウ ジングの端部に設けられた静止 リ ムとから形成されるラ ビリ ンス手段と、 A limb formed of a rotating rim provided at least in one shaft end region of the output shaft and a stationary rim provided at an end of the stay housing opposed to the rotating rim. Means of violence,
前記ラ ビリ ンス手段の前記回転リ ムと静止リ ム と の間に形成され 前記出力軸の軸端領域の周上に配設される環状シール室と、 An annular seal chamber formed between the rotating rim and the stationary rim of the labyrinth means and disposed around a shaft end region of the output shaft;
前記環状シール室内に格納され、 前記回転リ ム又は出力軸に一体 に止着された基底部と前記静止リ ムに静止速度から所定の速度まで 接触して前記ステ一夕ハウ ジ ング内部を封止する と共に前記所定速 度を越える高回転域で前記静止リ ムから遠心作用的に離反する舌状 シール部とを有して成る シール手段と、 The stationary housing is housed in the annular seal chamber and is fixedly connected to the rotating rim or the output shaft, and the stationary rim contacts the stationary rim from a stationary speed to a predetermined speed to seal the interior of the stay housing. A sealing means having a tongue-shaped seal portion which stops and centrifugally separates from the stationary rim in a high rotation range exceeding the predetermined speed;
を具備して構成されたこ とを特徴とする電動モータのための軸封装 置 o A shaft sealing device for an electric motor characterized by comprising:
2. 請求項 1 に記載の電動モータ のための軸封装置において、 前記ラ ビリ ンス形成手段の前記回転リ ムは、 前記出力軸と一体に 形成された断面 L字形を有した第 1 の環状部材から成り、 2. The shaft sealing device for an electric motor according to claim 1, wherein the rotating rim of the labyrinth forming means has a first annular shape formed integrally with the output shaft and having an L-shaped cross section. Consisting of members,
また、 前記ラ ビ リ ンス形成手段の静止リ ムは、 前記ステ一夕ハウ ジ ングと一体に形成された断面 L字形を有した第 2 の環状部材から 成り、 該第 1 、 第 2 の L字形環状部材の間に前記環状シール室を形 成する こ とを特徴とする電動モータ のための軸封装置。 The stationary rim of the Labyrinth forming means comprises a second annular member having an L-shaped cross section formed integrally with the stay housing, and the first and second L A shaft sealing device for an electric motor, wherein the annular seal chamber is formed between the U-shaped annular members.
3. 請求項 1 に記載の電動モータのための軸封装置において、 前記基底部と前記舌状シール部とを備えたシール手段は、 合成ゴム 材料から形成された成形部材である こ とを特徵とする電動モー タ の
ための軸封装置。 3. The shaft sealing device for an electric motor according to claim 1, wherein the sealing means including the base portion and the tongue-shaped sealing portion is a molded member formed of a synthetic rubber material. The electric motor Shaft sealing device for
4. 請求項 3 に記載の電動モータのための軸封装置において、 前記シール手段の舌状シール部には、 前記出力軸が所定の回転速 度域に達したと き、 遠心作用によ り前記静止リ ムか らの離反作用を 促進する錘手段が内蔵され、 以て該舌伏部の離反作用を調節するよ う に構成したこ とを特徵とする電動モータ のための軸封装置。 4. The shaft sealing device for an electric motor according to claim 3, wherein the tongue-shaped seal portion of the sealing means is provided with a centrifugal action when the output shaft reaches a predetermined rotation speed range. A shaft sealing device for an electric motor, characterized in that a weight means for promoting a separating action from the stationary rim is built in, so that the separating action of the tongue-and-fold portion is adjusted.
5. 請求項 4 に記載の電動モータのための軸封装置において、 前記錘手段は、 前記合成ゴム材料から成形された前記シール手段 の内部に埋め込まれた質量体から成り、 該質量体は金属又は樹脂材 料から成る こ とを特徵とする電動モータのための軸封装置。
5. The shaft sealing device for an electric motor according to claim 4, wherein the weight means comprises a mass body embedded inside the sealing means molded from the synthetic rubber material, wherein the mass body is made of metal. Or a shaft sealing device for an electric motor characterized by being made of a resin material.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5200670A JPH0755012A (en) | 1993-08-12 | 1993-08-12 | Shaft sealing device for electric motor |
JP5/200670 | 1993-08-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1995005699A1 true WO1995005699A1 (en) | 1995-02-23 |
Family
ID=16428287
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1994/001343 WO1995005699A1 (en) | 1993-08-12 | 1994-08-12 | Shaft sealing device for an electric motor |
Country Status (2)
Country | Link |
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JP (1) | JPH0755012A (en) |
WO (1) | WO1995005699A1 (en) |
Cited By (5)
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CN100398881C (en) * | 2006-01-15 | 2008-07-02 | 杜杰 | High-speed engine shaft sealing method |
GB2440251B (en) * | 2006-07-13 | 2011-06-01 | Pml Flightlink Ltd | Electric motors |
CN104205580A (en) * | 2011-12-21 | 2014-12-10 | 教皇电机有限公司 | Earth and/or sealing assembly for electric motors |
WO2014108231A3 (en) * | 2013-01-08 | 2015-02-19 | Siemens Aktiengesellschaft | Wheel hub motor and method for sealing a wheel hub motor |
WO2021047381A1 (en) * | 2019-09-09 | 2021-03-18 | 卧龙电气驱动集团股份有限公司 | Motor having double-sealing structure |
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JPS57133257U (en) * | 1981-02-12 | 1982-08-19 | ||
JPS57195352U (en) * | 1981-06-03 | 1982-12-10 |
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- 1993-08-12 JP JP5200670A patent/JPH0755012A/en active Pending
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Patent Citations (3)
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JPS50128576U (en) * | 1974-04-09 | 1975-10-22 | ||
JPS57133257U (en) * | 1981-02-12 | 1982-08-19 | ||
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
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CN100398881C (en) * | 2006-01-15 | 2008-07-02 | 杜杰 | High-speed engine shaft sealing method |
GB2440251B (en) * | 2006-07-13 | 2011-06-01 | Pml Flightlink Ltd | Electric motors |
US8688345B2 (en) | 2006-07-13 | 2014-04-01 | Protean Electric Limited | Electric motors |
US8688346B2 (en) | 2006-07-13 | 2014-04-01 | Protean Electric Limited | Electric motors |
US9065304B2 (en) | 2006-07-13 | 2015-06-23 | Protean Electric Limited | Electric motors |
CN104205580A (en) * | 2011-12-21 | 2014-12-10 | 教皇电机有限公司 | Earth and/or sealing assembly for electric motors |
WO2014108231A3 (en) * | 2013-01-08 | 2015-02-19 | Siemens Aktiengesellschaft | Wheel hub motor and method for sealing a wheel hub motor |
WO2021047381A1 (en) * | 2019-09-09 | 2021-03-18 | 卧龙电气驱动集团股份有限公司 | Motor having double-sealing structure |
Also Published As
Publication number | Publication date |
---|---|
JPH0755012A (en) | 1995-03-03 |
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