JP2011250504A - Waterproof motor - Google Patents

Waterproof motor Download PDF

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JP2011250504A
JP2011250504A JP2010118173A JP2010118173A JP2011250504A JP 2011250504 A JP2011250504 A JP 2011250504A JP 2010118173 A JP2010118173 A JP 2010118173A JP 2010118173 A JP2010118173 A JP 2010118173A JP 2011250504 A JP2011250504 A JP 2011250504A
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housing
output shaft
seal
motor
motor housing
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JP5402829B2 (en
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Kazunori Koizumi
和則 小泉
Masayuki Maruyama
正幸 丸山
Itsuo Watanabe
逸男 渡辺
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NSK Ltd
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NSK Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a waterproof motor in which a waterproof function can be fully secured on the periphery of an output axis even when a large amount of water splashes thereon.SOLUTION: If an output axis 6, which is provided on one end of a motor housing 1 having a cylindrical part 2 in the axial direction, is used so as to be facing in the other directions except an approximately downward direction, a seal housing 12 is provided on the end of the cylindrical part 2 of the motor housing 1 on the output axis side and an umbrella part 9 is formed from the output axis 6 toward the cylindrical part 2 of the motor housing 1. Additionally, a peripheral edge wall 15 is formed from the periphery of the umbrella part 9 toward the seal housing 12, and a dust seal 16 and an oil seal 18 are installed on the seal housing 12 so as to be in contact with the back face of the umbrella part 9 of the output axis 6. Thus water immersion from the periphery of the output axis 6 can be prevented. If the output 6 is used so as to be facing in the approximately downward direction, the peripheral edge wall 15 is hung down from the seal housing 12 toward the umbrella part 9 of the output axis 6.

Description

本発明は、水のある環境下で使用される防水モータに関し、例えばインデックステーブルなどの位置決め装置に使用されるダイレクトドライブモータに好適なものである。   The present invention relates to a waterproof motor used in an environment with water, and is suitable for a direct drive motor used in a positioning device such as an index table.

防水モータでの浸水問題の一つに出力軸の周囲からの浸水がある。例えば、下記特許文献１には従来技術として出力軸の外周にオイルシールを接触配置する例が挙げられているが、このような構造では、出力軸を上向きに使用するような場合、オイルシールに大量に水が溜まって浸水してしまう。そこで、前記特許文献１に記載される発明では、出力軸の外周にラビリンスシールを配設し、更にそのラビリンスシールより下方に排水溝を形成することで、出力軸の周囲からの浸水を抑制することが記載されている。   One of the problems of flooding in waterproof motors is flooding around the output shaft. For example, in Patent Document 1 below, an example in which an oil seal is disposed in contact with the outer periphery of an output shaft is given as a conventional technique. However, in such a structure, when the output shaft is used upward, an oil seal is used. A large amount of water accumulates and is flooded. Therefore, in the invention described in Patent Document 1, a labyrinth seal is disposed on the outer periphery of the output shaft, and further, a drainage groove is formed below the labyrinth seal, thereby preventing water from entering the periphery of the output shaft. It is described.

特開２００５−８６９４２号公報JP 2005-86942 A

しかしながら、前記特許文献１に記載される防水モータでも、出力軸の周囲に多量の水がかかると、ラビリンスシールから水が回り込んで浸水してしまう。
本発明は、上記のような問題点に着目してなされたものであり、多量の水がかかっても十分な出力軸周囲の防水機能を確保することが可能な防水モータを提供することを目的とするものである。 However, even with the waterproof motor described in Patent Document 1, when a large amount of water is applied around the output shaft, the water flows from the labyrinth seal and is submerged.
The present invention has been made paying attention to the above problems, and an object of the present invention is to provide a waterproof motor capable of ensuring a sufficient waterproof function around the output shaft even when a large amount of water is applied. It is what.

上記課題を解決するため、本発明の防水モータは、円筒部を有するモータハウジングの軸線方向の一端に出力軸が設けられ、当該出力軸を略下向き以外の方向に向けて使用する防水モータであって、前記モータハウジングの円筒部の出力軸側端部に設けられたシールハウジングと、前記出力軸からモータハウジングの円筒部に向けて形成された傘部と、前記傘部の外周部から前記シールハウジング側に向けて形成された周縁壁と、前記シールハウジングに取付けられ且つ前記出力軸の傘部の裏面に当接するダストシール及びオイルシールとを備えたことを特徴とするものである。
また、前記オイルシールは、前記出力軸の傘部からモータハウジング側に突設された円筒部の外周面に当接することを特徴とするものである。 In order to solve the above problems, the waterproof motor of the present invention is a waterproof motor in which an output shaft is provided at one end in the axial direction of a motor housing having a cylindrical portion, and the output shaft is used in a direction other than substantially downward. A seal housing provided at an output shaft side end of the cylindrical portion of the motor housing, an umbrella portion formed from the output shaft toward the cylindrical portion of the motor housing, and the seal from the outer peripheral portion of the umbrella portion A peripheral wall formed toward the housing side, and a dust seal and an oil seal attached to the seal housing and abutting against the back surface of the umbrella portion of the output shaft are provided.
Further, the oil seal is in contact with an outer peripheral surface of a cylindrical portion protruding from the umbrella portion of the output shaft toward the motor housing.

また、円筒部を有するモータハウジングの軸線方向の一端に出力軸が設けられ、当該出力軸を略下向き方向に向けて使用する防水モータであって、前記モータハウジングの円筒部の出力軸側端部に設けられたシールハウジングと、前記出力軸からモータハウジングの円筒部に向けて形成された傘部と、前記シールハウジングから前記傘部の外周部に向けて形成された周縁壁と、前記シールハウジングに取付けられ且つ前記出力軸の傘部の裏面に当接するダストシール及びオイルシールとを備えたことを特徴とするものである。
また、前記モータハウジングの出力軸と反対側のハウジングベースの中央に開口部がある場合、前記ハウジングベースに取付けられ且つ前記中央開口部を覆うカバーを備えたことを特徴とするものである。 An output shaft is provided at one end in the axial direction of the motor housing having a cylindrical portion, and the output shaft side end portion of the cylindrical portion of the motor housing is a waterproof motor that uses the output shaft in a substantially downward direction. A seal housing provided to the motor housing, an umbrella portion formed from the output shaft toward the cylindrical portion of the motor housing, a peripheral wall formed from the seal housing toward the outer peripheral portion of the umbrella portion, and the seal housing And a dust seal and an oil seal that are in contact with the back surface of the umbrella portion of the output shaft.
In the case where the opening is in the center of the housing base opposite to the output shaft of the motor housing, a cover is provided that is attached to the housing base and covers the central opening.

而して、本発明の防水モータによれば、円筒部を有するモータハウジングの軸線方向の一端に設けられた出力軸を略下向き以外の方向に向けて使用するにあたり、モータハウジングの円筒部の出力軸側端部にシールハウジングを設けると共に、出力軸からモータハウジングの円筒部に向けて傘部を形成し、その傘部の外周部からシールハウジング側に向けて周縁壁を形成し、出力軸の傘部の裏面に当接するダストシール及びオイルシールをシールハウジングに取付けたことにより、出力軸の周囲からの浸水を防止することが可能となり、多量の水がかかっても十分な防水機能を確保することができる。
また、出力軸の傘部からモータハウジング側に突設された円筒部の外周面にオイルシールを当接させることにより、モータハウジングへの浸水をより一層防止することができる。 Thus, according to the waterproof motor of the present invention, when the output shaft provided at one end in the axial direction of the motor housing having the cylindrical portion is used in a direction other than substantially downward, the output of the cylindrical portion of the motor housing is used. A seal housing is provided at the end of the shaft, an umbrella is formed from the output shaft toward the cylindrical portion of the motor housing, a peripheral wall is formed from the outer periphery of the umbrella toward the seal housing, and the output shaft By attaching a dust seal and oil seal that contacts the back of the umbrella to the seal housing, it is possible to prevent water from entering the periphery of the output shaft, ensuring a sufficient waterproof function even when a large amount of water is applied. Can do.
In addition, water contact with the motor housing can be further prevented by bringing the oil seal into contact with the outer peripheral surface of the cylindrical portion protruding from the umbrella portion of the output shaft toward the motor housing.

また、円筒部を有するモータハウジングの軸線方向の一端に設けられた出力軸を略下向き方向に向けて使用するにあたり、モータハウジングの円筒部の出力軸側端部にシールハウジングを設け、出力軸からモータハウジングの円筒部に向けて傘部を形成すると共に、シールハウジングから傘部の外周部に向けて周縁壁を形成し、出力軸の傘部の裏面に当接するダストシール及びオイルシールをシールハウジングに取付けたことにより、出力軸の周囲からの浸水を防止することが可能となり、多量の水がかかっても十分な防水機能を確保することができる。
また、モータハウジングの出力軸と反対側のハウジングベースの中央に開口部がある場合、当該中央開口部を覆うカバーをハウジングベースに取付けたことにより、中央開口部からのモータハウジング内への浸水を防止することができる。 Further, when the output shaft provided at one end in the axial direction of the motor housing having the cylindrical portion is used in a substantially downward direction, a seal housing is provided at the output shaft side end portion of the cylindrical portion of the motor housing. An umbrella part is formed toward the cylindrical part of the motor housing, a peripheral wall is formed from the seal housing toward the outer peripheral part of the umbrella part, and a dust seal and an oil seal that are in contact with the back surface of the umbrella part of the output shaft are formed on the seal housing. By mounting, it becomes possible to prevent water from entering the periphery of the output shaft, and a sufficient waterproof function can be secured even when a large amount of water is applied.
In addition, when there is an opening in the center of the housing base opposite to the output shaft of the motor housing, a cover that covers the central opening is attached to the housing base, so that the water into the motor housing from the central opening can be prevented. Can be prevented.

本発明の防水モータの第１実施形態を示す全体縦断面図である。1 is an overall longitudinal sectional view showing a first embodiment of a waterproof motor of the present invention. 本発明の防水モータの第２実施形態を示す全体縦断面図である。It is a whole longitudinal cross-sectional view which shows 2nd Embodiment of the waterproof motor of this invention.

次に、本発明の防水モータの第１実施形態について図面を参照しながら説明する。
図１は、本実施形態の防水モータの標準的な使用状態を示す全体縦断面図である。図中の符号１は、防水モータの容器をなすモータハウジングである。このモータハウジング１は、円柱状の防水モータの外形をなす円筒部２と、後述する軸線方向一端部の出力軸と反対側の軸線方向他端部を覆う（中央部に開口があり、完全に閉塞しているのではない）ハウジングベース３とを備える。このモータハウジング１の円筒部２内にはモータコア４が収納され、このモータコア４の内側には、ハウジングベース３に対して軸受８を介して回転自在に支持されたロータ５が収納され、モータコア４に電流を流すとロータ５が回転する。このロータ５の内側には、前記モータハウジング１のハウジングベース３の反対側から、当該モータハウジング１内への水の浸入を抑制防止するために断面Ｔ字状の傘状に形成された出力軸６の軸部１０が差し込まれ、その円板状傘部（フランジ部）９がボルト７によってロータ５に固定されている。この出力軸６を、例えばインデックステーブルなどの位置決め装置に接続して使用する。本実施形態では、出力軸６を下向き以外の方向（図１では上向き）に向けて使用する。なお、出力軸６の方向とは、出力の取出し方向と定義する。 Next, a first embodiment of the waterproof motor of the present invention will be described with reference to the drawings.
FIG. 1 is an overall longitudinal sectional view showing a standard use state of the waterproof motor of the present embodiment. Reference numeral 1 in the figure denotes a motor housing that forms a container of a waterproof motor. This motor housing 1 covers a cylindrical portion 2 that forms the outer shape of a cylindrical waterproof motor and an axial other end opposite to an output shaft at one axial end, which will be described later. And a housing base 3 that is not closed. A motor core 4 is accommodated in the cylindrical portion 2 of the motor housing 1, and a rotor 5 rotatably supported with respect to the housing base 3 via a bearing 8 is accommodated inside the motor core 4. When an electric current is passed through the rotor 5, the rotor 5 rotates. On the inner side of the rotor 5, an output shaft formed in an umbrella shape having a T-shaped cross section in order to suppress and prevent water from entering the motor housing 1 from the opposite side of the housing base 3 of the motor housing 1. 6 shaft portion 10 is inserted, and its disk-shaped umbrella portion (flange portion) 9 is fixed to rotor 5 by bolt 7. The output shaft 6 is used by being connected to a positioning device such as an index table. In this embodiment, the output shaft 6 is used in a direction other than downward (upward in FIG. 1). The direction of the output shaft 6 is defined as the output extraction direction.

また、図中の符号４０は、前記ロータ５とモータハウジング１のハウジングベースとの間に設けられたレゾルバ式回転検出器、符号４１は、当該レゾルバ式回転検出器４０を覆うレゾルバカバーである。また、前記出力軸６の円板状傘部９の出力側と反対側面（以下、裏面とも記す）には、ロータ５の外周面に緊密に嵌合する位置決め円筒部１１が立設されている。また、モータハウジング１の円筒部２のハウジングベース３と反対側の開口端には、Ｏリング１３を介して、シール円筒部１４を有するシールハウジング１２が嵌入されている。また、前記モータハウジング１のハウジングベース３の中央開口部３３には、出力軸６の軸部１０との間にオイルシール４２が介装され、当該オイルシール４２のシールリップ４３並びにダストリップ４４が出力軸６の軸部１０の外周面に当接して、ダスト及び水の侵入を防止している。   Reference numeral 40 in the figure denotes a resolver type rotation detector provided between the rotor 5 and the housing base of the motor housing 1, and reference numeral 41 denotes a resolver cover that covers the resolver type rotation detector 40. Further, a positioning cylindrical portion 11 that is closely fitted to the outer peripheral surface of the rotor 5 is provided upright on a side surface (hereinafter also referred to as a back surface) opposite to the output side of the disc-shaped umbrella portion 9 of the output shaft 6. . A seal housing 12 having a seal cylindrical portion 14 is fitted into an opening end of the cylindrical portion 2 of the motor housing 1 opposite to the housing base 3 via an O-ring 13. An oil seal 42 is interposed in the central opening 33 of the housing base 3 of the motor housing 1 between the shaft portion 10 of the output shaft 6, and a seal lip 43 and dust strip 44 of the oil seal 42 are provided. In contact with the outer peripheral surface of the shaft portion 10 of the output shaft 6, dust and water are prevented from entering.

例えば工作機械のインデックステーブルなどに防水モータが使用される場合、出力軸側の方が水（切削油などを含む）がかかりやすい。そのため、本実施形態では、例えば前記モータコア４への給電などのための配線部を２つ設けている。本実施形態では、モータハウジング１のうち、モータコア４の図示下方近傍に配線空間２２を形成し、この配線空間２２に連通する側面開口部２３をモータハウジング１の円筒部２に開設し、この側面開口部２３を第１配線部とする。また、配線空間２２をそのままモータハウジング１のハウジングベース３に開口して背面開口部２４を形成し、この背面開口部２４を第２配線部とする。第１配線部である側面開口部２３の近傍には、窪みを形成したり機械加工を施したりすることがなく、第２配線部である背面開口部２４も、配線空間２２をそのままハウジングベース３に開口し、後述する第２カバープレート２５を収納する座面２６を形成しただけである。   For example, when a waterproof motor is used for an index table of a machine tool, water (including cutting oil) is more likely to be applied to the output shaft side. Therefore, in the present embodiment, for example, two wiring portions for supplying power to the motor core 4 are provided. In the present embodiment, in the motor housing 1, a wiring space 22 is formed in the vicinity of the lower side of the motor core 4 in the figure, and a side opening 23 communicating with the wiring space 22 is opened in the cylindrical portion 2 of the motor housing 1. The opening 23 is a first wiring part. Further, the wiring space 22 is opened as it is in the housing base 3 of the motor housing 1 to form a back opening 24, and this back opening 24 is used as a second wiring part. In the vicinity of the side opening 23 that is the first wiring portion, no depression is formed or machined, and the rear opening 24 that is the second wiring portion also uses the wiring space 22 as it is in the housing base 3. The seating surface 26 is simply formed to accommodate the second cover plate 25 described later.

出力軸６にかかる水の量が少ない、通常使用時には、第１配線部である側面開口部２３を用いて配線を行う。側面開口部２３を用いて配線を行う場合には、背面開口部２４の座面２６に第２カバープレート２５を押し付けて背面開口部２４を閉塞する。第２カバープレート２５の配線空間２２側端面には背面開口部２４に嵌入する内側突出部３２が突設され、その内側突出部３２には、背面開口部２４の内面に当接するＯリング２７が収納されているので、第２カバープレート２５を背面開口部２４の座面２６に押し付けるだけで、背面開口部２４内に内側突出部３２が嵌入し、Ｏリング２７が背面開口部２４の内面に緊密に当接して防水機能が確保される。   In the normal use where the amount of water applied to the output shaft 6 is small, wiring is performed using the side opening 23 that is the first wiring portion. When wiring is performed using the side opening 23, the second cover plate 25 is pressed against the seat surface 26 of the back opening 24 to close the back opening 24. An inner protrusion 32 that fits into the rear opening 24 protrudes from the end surface of the second cover plate 25 on the wiring space 22 side, and an O-ring 27 that contacts the inner surface of the rear opening 24 is formed on the inner protrusion 32. Since the inner cover 32 is inserted into the rear opening 24 by simply pressing the second cover plate 25 against the seating surface 26 of the rear opening 24, the O-ring 27 is placed on the inner surface of the rear opening 24. A waterproof function is ensured by tight contact.

そして、モータハウジング１の円筒部２のうち、第１配線部である側面開口部２３の周縁部にパッキン２８をあてがい、そのパッキン２８の外側から第１コネクタスペーサ２９を押し付け、当該第１コネクタスペーサ２９をボルトでモータハウジング１の円筒部２の外周に固定する。第１コネクタスペーサ２９には、更に外部コネクタに接続される防水コネクタ３１を取付ける。パッキン２８は、例えばゴム製の方形薄板状であり、中央部に側面開口部２３に連通し且つ配線を行う開口部が形成され、ボルトを挿通するボルト穴が開設されている。また、開口部の周縁部及びボルト穴の周縁部には、パッキン２８の両面に突出するゴム製の凸部が一連に形成されている。第１コネクタスペーサ２９のモータハウジング１側面は、円筒部２の外周に緊密に当接する形状としてあるので、この第１コネクタスペーサ２９とモータハウジング１の円筒部２との間でパッキン２８が板厚方向に押圧されると、凸部が弾性変形して両者に密着し、防水機能が発揮される。   And packing 28 is applied to the peripheral part of side opening 23 which is the 1st wiring part among cylindrical parts 2 of motor housing 1, the 1st connector spacer 29 is pressed from the outside of packing 28, and the 1st connector spacer concerned 29 is fixed to the outer periphery of the cylindrical portion 2 of the motor housing 1 with a bolt. A waterproof connector 31 connected to the external connector is further attached to the first connector spacer 29. The packing 28 is, for example, a rectangular thin plate made of rubber, and has an opening for communicating with the side opening 23 and wiring in the center, and a bolt hole for inserting a bolt is formed. Further, a series of rubber convex portions protruding on both surfaces of the packing 28 are formed on the peripheral portion of the opening and the peripheral portion of the bolt hole. Since the side surface of the motor housing 1 of the first connector spacer 29 is in close contact with the outer periphery of the cylindrical portion 2, the packing 28 has a plate thickness between the first connector spacer 29 and the cylindrical portion 2 of the motor housing 1. When pressed in the direction, the convex portions are elastically deformed and are in close contact with each other, thereby providing a waterproof function.

一方、出力軸６にかかる水の量が多く、第１配線部である側面開口部２３を用いた配線では十分な防水機能を確保できない場合には、第２配線部である背面開口部２４を用いて配線を行う。まず、背面開口部２４を用いて配線を行う場合には、モータハウジング１の円筒部２のうち、第１配線部である側面開口部２３の周縁部に前記パッキン２８をあてがい、そのパッキン２８の外側から図示しない第１カバープレートを押し付け、当該第１カバープレートをボルトでモータハウジング１の円筒部２の外周に固定する。この場合も、第１カバープレートとモータハウジング１の円筒部２との間でパッキン２８が板厚方向に押圧されると、凸部が弾性変形して両者に密着し、防水機能が発揮される。   On the other hand, when the amount of water applied to the output shaft 6 is large, and the wiring using the side opening 23 serving as the first wiring part cannot secure a sufficient waterproof function, the rear opening 24 serving as the second wiring part is provided. Use for wiring. First, when wiring is performed using the rear opening 24, the packing 28 is applied to the peripheral portion of the side opening 23 that is the first wiring portion of the cylindrical portion 2 of the motor housing 1. A first cover plate (not shown) is pressed from the outside, and the first cover plate is fixed to the outer periphery of the cylindrical portion 2 of the motor housing 1 with a bolt. Also in this case, when the packing 28 is pressed between the first cover plate and the cylindrical portion 2 of the motor housing 1 in the plate thickness direction, the convex portions are elastically deformed and are in close contact with each other, thereby exhibiting a waterproof function. .

そして、前述した背面開口部２４の第２カバープレート２５を取り外し、当該背面開口部２４に、ボルトを用いて、第２コネクタスペーサを取付け、この第２コネクタスペーサに前記防水コネクタ３１を取付ける。この第２コネクタスペーサの配線空間２２側端面にも背面開口部２４に嵌入する内側突出部が突設され、その内側突出部には、背面開口部２４の内面に当接するＯリングが収納されているので、第２コネクタスペーサを背面開口部２４の座面２６にボルトで押し付けるだけで、背面開口部２４内に内側突出部が嵌入し、Ｏリングが背面開口部２４の内面に緊密に当接して防水機能が確保される。   And the 2nd cover plate 25 of the back surface opening part 24 mentioned above is removed, the 2nd connector spacer is attached to the said back surface opening part 24 using a volt | bolt, and the said waterproof connector 31 is attached to this 2nd connector spacer. An inner protrusion that fits into the rear opening 24 protrudes from the end face of the second connector spacer on the wiring space 22 side, and an O-ring that contacts the inner surface of the rear opening 24 is accommodated in the inner protrusion. Therefore, just by pressing the second connector spacer against the seat surface 26 of the rear opening 24 with a bolt, the inner projecting portion is fitted into the rear opening 24, and the O-ring closely contacts the inner surface of the rear opening 24. Waterproof function is ensured.

前述したように、出力軸側の方が水がかかりやすい。そのため、本実施形態では、モータハウジング１の円筒部２のハウジングベース３と反対側の開口面を出力軸６の円板状傘部９で覆い、更に円板状傘部９の周縁部からモータハウジング１の円筒部２側、つまり前記シールハウジング１２側に向けて周縁壁１５を立設し、この周縁壁１５が前記モータハウジング１の円筒部２の開口端に嵌入されたシールハウジング１２の外周を覆うことにより、モータハウジング１内への水の浸入を抑制している。更に本実施形態では、前記シールハウジング１２のシール円筒部１４の外周にダストシール１６が被嵌され、そのダストリップ１７が前記出力軸６の円板状傘部９の裏面に当接してモータハウジング１内へのダストの侵入を防止している。そして、前記シールハウジング１２のシール円筒部１４の内周にはオイルシール１８が嵌入され、当該オイルシール１８のうち、円環状のスプリング１９が外装されたシールリップ２０が前記出力軸６の裏面に立設された位置決め円筒部１１の外周面に当接してモータハウジング１内への水の浸入を防止している。なお、オイルシール１８に設けられたダストリップ２１も前記出力軸６の位置決め円筒部１１の外周面に当接している。   As described above, water is more likely to be applied to the output shaft side. Therefore, in this embodiment, the opening surface on the opposite side of the housing base 3 of the cylindrical portion 2 of the motor housing 1 is covered with the disc-shaped umbrella portion 9 of the output shaft 6, and further, the motor is applied from the peripheral portion of the disc-shaped umbrella portion 9 to the motor. A peripheral wall 15 is erected toward the cylindrical portion 2 side of the housing 1, that is, toward the seal housing 12, and the peripheral wall 15 is inserted into the opening end of the cylindrical portion 2 of the motor housing 1. By covering the surface, intrusion of water into the motor housing 1 is suppressed. Furthermore, in this embodiment, the dust seal 16 is fitted on the outer periphery of the seal cylindrical portion 14 of the seal housing 12, and the dust lip 17 abuts on the back surface of the disk-shaped umbrella portion 9 of the output shaft 6. Prevents dust from entering inside. An oil seal 18 is fitted into the inner periphery of the seal cylindrical portion 14 of the seal housing 12, and a seal lip 20 with an annular spring 19 is provided on the back surface of the output shaft 6. Contact with the outer peripheral surface of the standing positioning cylindrical portion 11 prevents water from entering the motor housing 1. The dust lip 21 provided on the oil seal 18 is also in contact with the outer peripheral surface of the positioning cylindrical portion 11 of the output shaft 6.

このように本実施形態の防水モータでは、円筒部２を有するモータハウジング１の軸線方向の一端に設けられた出力軸６を略下向き以外の方向に向けて使用するにあたり、モータハウジング１の円筒部２の出力軸側端部にシールハウジング１２を設けると共に、出力軸６からモータハウジング１の円筒部２に向けて傘部９を形成し、その傘部９の外周部からシールハウジング１２側に向けて周縁壁１５を形成し、出力軸６の傘部９の裏面に当接するダストシール１６及びオイルシール１８をシールハウジング１２に取付けたことにより、出力軸６の周囲からの浸水を防止することが可能となり、多量の水がかかっても十分な防水機能を確保することができる。
また、出力軸６の傘部９からモータハウジング１側に突設された位置決め円筒部１１の外周面にオイルシール１８を当接させることにより、モータハウジング１への浸水をより一層防止することができる。 Thus, in the waterproof motor of this embodiment, when the output shaft 6 provided at one end in the axial direction of the motor housing 1 having the cylindrical portion 2 is used in a direction other than substantially downward, the cylindrical portion of the motor housing 1 is used. 2 is provided with a seal housing 12 at the output shaft side end, an umbrella portion 9 is formed from the output shaft 6 toward the cylindrical portion 2 of the motor housing 1, and the outer peripheral portion of the umbrella portion 9 is directed toward the seal housing 12. By forming the peripheral wall 15 and attaching the dust seal 16 and the oil seal 18 that contact the back surface of the umbrella portion 9 of the output shaft 6 to the seal housing 12, it is possible to prevent water from entering the periphery of the output shaft 6. Thus, even if a large amount of water is applied, a sufficient waterproof function can be secured.
Further, the oil seal 18 is brought into contact with the outer peripheral surface of the positioning cylindrical portion 11 projecting from the umbrella portion 9 of the output shaft 6 toward the motor housing 1, thereby further preventing water from entering the motor housing 1. it can.

図２は、本発明の防水モータの第２実施形態を示す縦断面図である。本実施形態の防水モータは、前記図１の第２実施形態の防水モータによく似ており、同等の構成には同等の符号を付して、その詳細な説明を省略する。本実施形態では、まず出力軸６を下向き方向に向けて使用することが前提となる。そのため、全体的には、前記第１実施形態の図１の防水モータを１８０°反転したような形態となっている。出力軸６を下向き方向に向けて使用する場合には、水はハウジングベース３側からかかる。そこで、本実施形態では、前記第１実施形態で出力軸６の円板状傘部９の外周からモータハウジング１の円筒部２側、つまりシールハウジング１２側に向けて周縁壁１５を立設したのに対し、円板状傘部９の外径をモータハウジング１の円筒部２の外径より少し小さくし、シールハウジング１２の外径部を垂下して周縁壁１５とし、この周縁壁１５で出力軸６の円板状傘部９の外周を覆うことで、上方からの水の流れがモータハウジング１内に浸水しないようにした。   FIG. 2 is a longitudinal sectional view showing a second embodiment of the waterproof motor of the present invention. The waterproof motor of this embodiment is very similar to the waterproof motor of the second embodiment shown in FIG. 1, and the same reference numerals are given to the same components, and the detailed description thereof is omitted. In the present embodiment, it is assumed that the output shaft 6 is first used in the downward direction. Therefore, as a whole, the waterproof motor of FIG. 1 of the first embodiment is reversed 180 °. When the output shaft 6 is used in the downward direction, water is applied from the housing base 3 side. Therefore, in the present embodiment, the peripheral wall 15 is erected from the outer periphery of the disk-shaped umbrella portion 9 of the output shaft 6 toward the cylindrical portion 2 side of the motor housing 1, that is, the seal housing 12 side in the first embodiment. On the other hand, the outer diameter of the disc-shaped umbrella portion 9 is made slightly smaller than the outer diameter of the cylindrical portion 2 of the motor housing 1, and the outer diameter portion of the seal housing 12 is suspended to form a peripheral wall 15. By covering the outer periphery of the disk-shaped umbrella portion 9 of the output shaft 6, the flow of water from above was prevented from entering the motor housing 1.

更に本実施形態の場合、モータハウジング１のハウジングベース３に開設されている中央開口部３３からオイルシール４２の上に水がかかるため、この中央開口部３３を円板状のカバー３４で覆い、当該カバー３４をボルト３５でハウジングベース３に固定する。カバー３４とハウジングベース３の間にはＯリング３６が嵌め込まれており、オイルシール４２への浸水を防止することができる。但し、本実施形態では、出力軸６の軸部１０の中央部に貫通穴３７が形成されており、この貫通穴３７を通じて水を落下させることができるので、カバー３４の中央部に穴を開け、その穴の周囲を出力軸６の軸部１０の貫通穴３７内に落とし込ませてガイド３８を形成し、このガイド３８から水が貫通穴３７内に落下するようにした。   Furthermore, in the case of this embodiment, since water is applied on the oil seal 42 from the central opening 33 provided in the housing base 3 of the motor housing 1, the central opening 33 is covered with a disc-shaped cover 34, The cover 34 is fixed to the housing base 3 with bolts 35. An O-ring 36 is fitted between the cover 34 and the housing base 3 so that the oil seal 42 can be prevented from being flooded. However, in this embodiment, a through hole 37 is formed in the central portion of the shaft portion 10 of the output shaft 6, and water can be dropped through the through hole 37, so that a hole is formed in the central portion of the cover 34. The periphery of the hole was dropped into the through hole 37 of the shaft portion 10 of the output shaft 6 to form a guide 38, and water was dropped from the guide 38 into the through hole 37.

このように本実施形態の防水モータでは、円筒部２を有するモータハウジング１の軸線方向の一端に設けられた出力軸６を略下向き方向に向けて使用するにあたり、モータハウジング１の円筒部２の出力軸側端部にシールハウジング１２を設け、出力軸６からモータハウジング１の円筒部２に向けて傘部９を形成すると共に、シールハウジング１２から傘部９の外周部に向けて周縁壁１５を形成し、出力軸６の傘部９の裏面に当接するダストシール１６及びオイルシール１８をシールハウジング１２に取付けたことにより、出力軸６の周囲からの浸水を防止することが可能となり、多量の水がかかっても十分な防水機能を確保することができる。
また、モータハウジング１の出力軸６と反対側のハウジングベース３の中央に開口部３３がある場合、当該中央開口部３３を覆うカバー３４をハウジングベース３に取付けたことにより、中央開口部３３からのモータハウジング１内への浸水を防止することができる。 As described above, in the waterproof motor of the present embodiment, when the output shaft 6 provided at one end in the axial direction of the motor housing 1 having the cylindrical portion 2 is used in the substantially downward direction, the cylindrical portion 2 of the motor housing 1 A seal housing 12 is provided at the output shaft side end, an umbrella portion 9 is formed from the output shaft 6 toward the cylindrical portion 2 of the motor housing 1, and a peripheral wall 15 from the seal housing 12 toward the outer peripheral portion of the umbrella portion 9. And the dust seal 16 and the oil seal 18 that are in contact with the back surface of the umbrella portion 9 of the output shaft 6 are attached to the seal housing 12, so that it is possible to prevent water from entering around the output shaft 6, and a large amount Sufficient waterproof function can be secured even if it is splashed with water.
When the opening 33 is located at the center of the housing base 3 opposite to the output shaft 6 of the motor housing 1, the cover 34 covering the center opening 33 is attached to the housing base 3. It is possible to prevent water from entering the motor housing 1.

１はモータハウジング、２は円筒部、３はハウジングベース、４はモータコア、５はロータ、６は出力軸、７はボルト、８は軸受、９は円板状傘部、１０は軸部、１１は位置決め円筒部、１２はシールハウジング、１３はＯリング、１４はシール円筒部、１５は周縁壁、１６はダストシール、１７はダストリップ、１８はオイルシール、１９はスプリング、２０はシールリップ、２１はダストリップ、２２は配線空間、２３は側面開口部（第１配線部）、２４は背面開口部（第２配線部）、２５は第２カバープレート、２６は座面、２７がＯリング、２８はパッキン、２９は第１コネクタスペーサ、３１は防水コネクタ、３２は内側突出部、３３は中央開口部、３４はカバー、３５はボルト、３６はＯリング、３７は貫通穴、３８はガイド、４０はレゾルバ式回転検出器、４１はレゾルバカバー、４２はオイルシール、４３はシールリップ、４４はダストリップ   1 is a motor housing, 2 is a cylindrical portion, 3 is a housing base, 4 is a motor core, 5 is a rotor, 6 is an output shaft, 7 is a bolt, 8 is a bearing, 9 is a disk-shaped umbrella portion, 10 is a shaft portion, 11 Is a positioning cylinder, 12 is a seal housing, 13 is an O-ring, 14 is a seal cylinder, 15 is a peripheral wall, 16 is a dust seal, 17 is a dust lip, 18 is an oil seal, 19 is a spring, 20 is a seal lip, 21 Is a dust strip, 22 is a wiring space, 23 is a side opening (first wiring part), 24 is a back opening (second wiring part), 25 is a second cover plate, 26 is a seating surface, 27 is an O-ring, 28 is a packing, 29 is a first connector spacer, 31 is a waterproof connector, 32 is an inner protrusion, 33 is a central opening, 34 is a cover, 35 is a bolt, 36 is an O-ring, 37 is a through hole, 38 is a guide, 0 resolver type rotation detector, the resolver cover 41, 42 is an oil seal, 43 seal lip, the dust lip 44

Claims (4)

円筒部を有するモータハウジングの軸線方向の一端に出力軸が設けられ、当該出力軸を略下向き以外の方向に向けて使用する防水モータであって、前記モータハウジングの円筒部の出力軸側端部に設けられたシールハウジングと、前記出力軸からモータハウジングの円筒部に向けて形成された傘部と、前記傘部の外周部から前記シールハウジング側に向けて形成された周縁壁と、前記シールハウジングに取付けられ且つ前記出力軸の傘部の裏面に当接するダストシール及びオイルシールとを備えたことを特徴とする防水モータ。   An output shaft is provided at one end in the axial direction of a motor housing having a cylindrical portion, and is a waterproof motor that uses the output shaft in a direction other than substantially downward, and is an output shaft side end portion of the cylindrical portion of the motor housing. A seal housing provided to the motor housing, an umbrella portion formed from the output shaft toward the cylindrical portion of the motor housing, a peripheral wall formed from an outer peripheral portion of the umbrella portion toward the seal housing, and the seal A waterproof motor comprising a dust seal and an oil seal attached to a housing and abutting against a back surface of an umbrella portion of the output shaft. 前記オイルシールは、前記出力軸の傘部からモータハウジング側に突設された円筒部の外周面に当接することを特徴とする請求項１に記載の防水モータ。   2. The waterproof motor according to claim 1, wherein the oil seal is in contact with an outer peripheral surface of a cylindrical portion protruding from the umbrella portion of the output shaft toward the motor housing. 円筒部を有するモータハウジングの軸線方向の一端に出力軸が設けられ、当該出力軸を略下向き方向に向けて使用する防水モータであって、前記モータハウジングの円筒部の出力軸側端部に設けられたシールハウジングと、前記出力軸からモータハウジングの円筒部に向けて形成された傘部と、前記シールハウジングから前記傘部の外周部に向けて形成された周縁壁と、前記シールハウジングに取付けられ且つ前記出力軸の傘部の裏面に当接するダストシール及びオイルシールとを備えたことを特徴とする防水モータ。   An output shaft is provided at one end in the axial direction of a motor housing having a cylindrical portion, and is a waterproof motor that uses the output shaft in a substantially downward direction, and is provided at an output shaft side end portion of the cylindrical portion of the motor housing. Attached to the seal housing, an umbrella portion formed from the output shaft toward the cylindrical portion of the motor housing, a peripheral wall formed from the seal housing toward the outer periphery of the umbrella portion, and the seal housing A waterproof motor comprising a dust seal and an oil seal that are in contact with the back surface of the umbrella portion of the output shaft. 前記モータハウジングの出力軸と反対側のハウジングベースの中央に開口部がある場合、前記ハウジングベースに取付けられ且つ前記中央開口部を覆うカバーを備えたことを特徴とする請求項３に記載の防水モータ。   The waterproof according to claim 3, further comprising a cover that is attached to the housing base and covers the central opening when the opening is in the center of the housing base opposite to the output shaft of the motor housing. motor.
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WO2014188672A1 (en) * 2013-05-20 2014-11-27 日本精工株式会社 Motor, positioning device, conveyance device
KR20160000464A (en) 2013-05-20 2016-01-04 닛본 세이고 가부시끼가이샤 Motor, positioning device, conveyance device
KR101728625B1 (en) * 2013-05-20 2017-04-19 닛본 세이고 가부시끼가이샤 Motor, positioning device, conveyance device
JP2018141353A (en) * 2017-02-28 2018-09-13 水ｉｎｇ株式会社 Water treatment facility with waterproof cover for drive unit

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