JP4897442B2

JP4897442B2 - Fan motor drain structure

Info

Publication number: JP4897442B2
Application number: JP2006315761A
Authority: JP
Inventors: 行太島田; 修一前沢
Original assignee: T Rad Co Ltd
Current assignee: T Rad Co Ltd
Priority date: 2006-11-22
Filing date: 2006-11-22
Publication date: 2012-03-14
Anticipated expiration: 2026-11-22
Also published as: JP2008131791A

Description

本発明は、各種車両の電動ファンモータの水抜構造に関するものである。 The present invention relates to a drainage structure for an electric fan motor of various vehicles.

車両のラジエータやコンデンサ等は、停止状態において或いは低走行状態において電動ファンモータにより冷却される。このファンモータは、タイヤのはね水や巻上げ水による被水から保護する必要がある。また、モータ内部に水が進入した場合には、水を外部に迅速に排出する必要がある。
このようなファンモータの水抜構造として、特許文献１に記載のものが提案されている。このファンモータは、ステータとしての永久磁石によってハウジングの下端部を軸方向に二分し、ハウジングの最下部の前方位置に第１の水抜孔を形成すると共に、ハウジングの端蓋近傍に下方に向けて第２の水抜孔を設ける。そして、その第２の水抜孔に迷路状のカバーを嵌着したものである。 A vehicle radiator, a condenser, and the like are cooled by an electric fan motor in a stopped state or in a low running state. This fan motor needs to be protected from water splashing by the tire and water from the hoisting water. In addition, when water enters the motor, it is necessary to quickly discharge the water to the outside.
As such a drainage structure for a fan motor, a structure described in Patent Document 1 has been proposed. This fan motor bisects the lower end of the housing in the axial direction by a permanent magnet as a stator, forms a first drain hole at the front position at the bottom of the housing , and faces downward near the end cover of the housing. A second drain hole is provided. A maze-like cover is fitted into the second drain hole.

特許第３１６８１７７号公報Japanese Patent No. 3168177 実公平７−２４９２３号公報Japanese Utility Model Publication No. 7-24923

上記の水抜構造は、ハウジングの軸方向の前端部および後端部に夫々水抜のための加工が必要であると共に、後端部には別個のカバー部材を取付ける必要があった。このカバー部材は、エンジンおよびモータの発熱に対処する必要上、耐熱性の高い材料を使用するため、コスト高になるおそれがあった。
また、そのカバー部材が破損・脱落した場合、ケーシング内部に水が進入し、絶縁劣化や腐食等が進行してファンモータの耐久性を低下するおそれがあった。
さらには、水抜き孔を覆う別個の部品を必要とするため、材料コストを引き上げると共にその組立工数が増大し、結果としてファンモータの価格を引き上げるという問題点があった。
そこで本発明は、かかる問題点を解決することを課題とする。 The above drainage structure requires processing for draining at the front end portion and the rear end portion in the axial direction of the housing , and a separate cover member needs to be attached to the rear end portion. Since this cover member needs to cope with the heat generation of the engine and the motor, a material having high heat resistance is used, which may increase the cost.
In addition, when the cover member is damaged or dropped, water enters the casing, and there is a risk that the deterioration of the fan motor may be deteriorated due to progress of insulation deterioration or corrosion.
Furthermore, since a separate part for covering the drain hole is required, the material cost is increased and the number of assembling steps is increased. As a result, there is a problem that the price of the fan motor is increased.
Therefore, an object of the present invention is to solve such problems.

請求項１に記載の本発明は、内部にロータ(1) およびステータ(2) が収納され、開口が端蓋(3) で閉塞される有底円筒状のハウジング(4) と、
そのハウジング(4) の外周に整合し、その外周にリング状に被嵌されて、モータ取付部を構成するリング部材(5) と、を有するファンモータの水抜構造において、
前記リング部材(5) に対向した位置で前記ハウジング(4) の最下位置に、その内面側へ四周を囲む立ち上げ壁面(6) および底面(7) を有する凹陥部(8) が設けられ、
その凹陥部(8) が前記ステータ(2) の高さ以下の高さを有する台形状に形成され、その底面(7) の中央部の外面側に、そのハウジング(4) の周方向に沿う断面が弧状に突出する水拡散部(12)が設けられ、
前記ハウジング(4) の軸線方向で、凹陥部(8) の両側に位置する前記立ち上げ壁面(6) の付根のみに一対の水排出孔(9) が設けられ、
前記ステータ(2) が一対の円弧状の磁石(2a)からなり、夫々の磁石(2a)の下端縁が前記凹陥部(8) の前記立ち上げ壁面(6) に位置決めされ、
前記凹陥部(8) と前記リング部材(5) との間に小室(10)が形成されると共に、前記底面(7) の中心部に対向してそのリング部材(5) に水抜孔(11)が形成されたことを特徴とするファンモータの水抜構造である。 The present invention according to claim 1 includes a cylindrical housing with a bottom (4) in which a rotor (1) and a stator (2) are housed and whose opening is closed by an end cover (3).
In a drainage structure for a fan motor having a ring member (5) that aligns with the outer periphery of the housing (4) and is fitted in a ring shape on the outer periphery to form a motor mounting portion,
A concave portion (8) having a rising wall surface (6) and a bottom surface (7) surrounding the four circumferences on the inner surface side is provided at the lowermost position of the housing (4) at a position facing the ring member (5). ,
The recessed portion (8) is formed in a trapezoidal shape having a height equal to or lower than the height of the stator (2), and is formed on the outer surface side of the center portion of the bottom surface (7) along the circumferential direction of the housing (4) A water diffusion part (12) whose cross section protrudes in an arc shape is provided,
In the axial direction of the housing (4), a pair of water discharge holes (9) is provided only at the root of the rising wall surface (6) located on both sides of the recessed portion (8),
The stator (2) is composed of a pair of arc-shaped magnets (2a), and the lower edge of each magnet (2a) is positioned on the rising wall surface (6) of the recessed portion (8),
A small chamber (10) is formed between the recessed portion (8) and the ring member (5), and a drain hole (11) is formed in the ring member (5) so as to face the center of the bottom surface (7). Is a drainage structure of a fan motor, characterized in that

本発明のファンモータの水抜構造は、ハウジング４の最下部の内面側へ凹陥部８が設けられ、その四周を囲む立ち上げ壁面６の付根に水排出孔９が設けられ、凹陥部８とリング部材５との間に小室10が形成されると共に、その底面７の中心部に対向してリング部材５に水抜孔11が形成されたものである。
このように構成することにより、ハウジング４内に進入した水は凹陥部８の付根部の水排出孔９，小室10，リング部材５の水抜孔11を介して排出される。
また、リング部材５の水抜孔11から勢い良く進入する進入水17は、凹陥部８の底面７に衝突し勢いを弱められて小室10のリング部材５の上面から水抜孔11に排出される。他方、一部水排出孔９からハウジング内に進入した水は、その水排出孔９から再び小室10,水抜孔11を介し外部に排出される。しかもこの水抜構造は、従来のハウジング４およびリング部材５に僅かな加工を加えるのみでたり、他の部品を必要としないので、構造が簡単で故障し難い水抜構造を安価に提供できる。 The drainage structure of the fan motor of the present invention is provided with a recessed portion 8 on the inner surface side of the lowermost portion of the housing 4 , a water discharge hole 9 provided at the base of the rising wall surface 6 surrounding the four circumferences , and the recessed portion 8 and the ring. A small chamber 10 is formed between the member 5 and a drain hole 11 is formed in the ring member 5 so as to face the center of the bottom surface 7.
With this configuration, the water that has entered the housing 4 is discharged through the water discharge hole 9 at the base of the recessed portion 8, the small chamber 10, and the water drain hole 11 of the ring member 5.
Further, the incoming water 17 that enters the water from the drain hole 11 of the ring member 5 collides with the bottom surface 7 of the recessed portion 8 and is weakened and is discharged from the upper surface of the ring member 5 of the small chamber 10 to the water drain hole 11. On the other hand, water that has partially entered the housing through the water discharge hole 9 is discharged from the water discharge hole 9 to the outside again through the small chamber 10 and the drain hole 11. In addition, this drainage structure can provide a drainage structure that is simple in structure and difficult to break down at low cost because it requires only a slight processing to the conventional housing 4 and ring member 5 and does not require other parts.

さらに、凹陥部８を台形状に形成し、ハウジング４の軸線方向における凹陥部８の両側の付根のみに水排出孔９を設けたので、排水を迅速に行うことができると共に、車両が坂道等に位置しファンモータが傾斜しても、何れか一方の水排出孔９から排水することができる。
また、底面７の中央部の外面側に、ハウジング４の周方向に沿う断面が弧状に突出する水拡散部12を設けたので、水抜孔11からの進入する進入水17を水拡散部12によって周方向に分散し、軸方向両側に位置する水排出孔９側に水を移動させないようにして、分散した水を確実に水抜孔11から外部に流出させることができる。 Further, to form a recess 8 in a trapezoidal shape, is provided with the water discharge hole 9 only at the base on both sides of the recessed portion 8 in the axial direction of the housing 4, it is possible to perform the draining fast, the vehicle is hill like Even if the fan motor is inclined at the position, it can be drained from one of the water discharge holes 9.
Further, on the outer surface of the central portion of the bottom surface 7, the cross section along the circumferential direction of the housing 4 is provided with a water diffusion portion 12 protruding in an arc, the entering water 17 entering from water drainage holes 11 by the water diffusion section 12 Dispersed water can be reliably discharged to the outside through the drain hole 11 without being dispersed in the circumferential direction and not moving water to the water discharge holes 9 located on both sides in the axial direction.

さらには、ステータ２が一対の円弧状の磁石2aからなり、夫々の磁石2aの下端縁を凹陥部８の立ち上げ壁面６に位置決めしたので、磁石2aの少なくとも下端部における位置決め部材を不要とし、構造が簡単で部品点数の少ないファンモータを提供できる。 Furthermore, it stator 2 is a pair of arc-shaped magnets 2a, since the positioning of the lower edge of each magnet 2a in the launch wall 6 of the recess 8, and unnecessary positioning member in at least the lower end portion of the magnet 2a, A fan motor with a simple structure and a small number of parts can be provided.

以下図面に基づき、本発明の実施の形態につき説明する。
図１は本発明の水抜構造を有するファンモータの一部破断正面図であり、図２はそのII−II矢視断面略図、図３は図１における水抜構造の拡大図である。また、図４はその凹陥部８をハウジング４内面側から見た斜視略図である。
このファンモータは、有底の円筒状に形成されたハウジング４とその一端開口を閉塞する端蓋３とを有する。ハウジング４内には、図２に示す如く一対の磁石2aからなるステータ２とロータ１とが内装されている。ロータ１にはその中心に図１に示す出力軸14が固定され、その両端部が端蓋３の軸受13およびハウジング４の底部に設けられた軸受13に支持され、出力軸14の一端が軸線方向に突出する。そしてこの出力軸14に図示しないファンが取付けられるものである。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a partially cutaway front view of a fan motor having a drainage structure according to the present invention, FIG. 2 is a schematic sectional view taken along the line II-II, and FIG. 3 is an enlarged view of the drainage structure in FIG. FIG. 4 is a schematic perspective view of the recessed portion 8 as viewed from the inner surface side of the housing 4.
This fan motor has a housing 4 formed in a cylindrical shape with a bottom and an end lid 3 that closes one end opening thereof. In the housing 4, as shown in FIG. 2, a stator 2 and a rotor 1 made of a pair of magnets 2a are housed . An output shaft 14 shown in FIG. 1 is fixed to the rotor 1 at its center, and both end portions thereof are supported by a bearing 13 of the end cover 3 and a bearing 13 provided at the bottom of the housing 4, and one end of the output shaft 14 is an axis line. Protrude in the direction. A fan (not shown) is attached to the output shaft 14.

ハウジング４の外周には、それに整合するリング状のリング部材５が被嵌され、両者間が溶接等の手段により一体的に固定されている。リング部材５の軸方向の一端縁には互いに１２０°離間してフランジ部16が軸線に対して直交する方向に突設されている。そのフランジ部16にはボルト孔が穿設され、それに挿通されるボルトおよびファンシュラウドのステーを介して、ファンモータがファンシュラウドの軸線上に一体に取付けられるものである。そのハウジング４には、その最下位置にその内面側へ凹陥部８が設けられている。 A ring-shaped ring member 5 aligned therewith is fitted on the outer periphery of the housing 4, and the two are integrally fixed by means such as welding. At one end edge in the axial direction of the ring member 5, a flange portion 16 is provided so as to protrude in a direction perpendicular to the axial line, spaced from each other by 120 °. The flange portion 16 is provided with a bolt hole, and a fan motor is integrally mounted on the axis of the fan shroud via a bolt inserted through the flange portion 16 and a stay of the fan shroud. The housing 4 is provided with a recess 8 at the lowermost position on the inner surface side.

この凹陥部８は、図４に示す如く、横断面が台形に形成され、その周縁部が立ち上げ壁面６となる底面７を有する。そして底面７の周方向の中央部には、その外面側に断面弧状に突出する水拡散部12が設けられている。ハウジング４の軸方向（以下、単に軸方向という）の凹陥部８の幅は、ロータ１の積層鉄板の軸方向の幅に略等しい。それと共に、ステータ２の磁石2aの幅に略等しい。その軸方向の両立ち上げ部６の付根には一対の水排出孔９が穿設されている。 As shown in FIG. 4, the recessed portion 8 has a trapezoidal cross section, and has a bottom surface 7 whose peripheral portion becomes a rising wall surface 6. And in the center part of the circumferential direction of the bottom face 7, the water diffusion part 12 which protrudes in cross-sectional arc shape is provided in the outer surface side. The width of the recessed portion 8 in the axial direction (hereinafter simply referred to as the axial direction) of the housing 4 is substantially equal to the axial width of the laminated iron plate of the rotor 1. At the same time, it is approximately equal to the width of the magnet 2a of the stator 2. A pair of water discharge holes 9 are formed at the roots of the two rising portions 6 in the axial direction.

そして一対の磁石2aの夫々の下端縁は、凹陥部８の周方向の両立ち上げ壁面６に当接する。その両磁石2aの上端縁間の空間に、磁石ホルダ18が圧入される（図２）。それによって一対の磁石2aは、ハウジング４の内面に位置決め固定される。この磁石ホルダ18は、図５に示す如く一例としてＵ字状に形成され、Ｕ字の開口が拡縮できる方向に弾性変形可能な材料からなる。ハウジンク４の凹陥部８の外面側には、リング部材５が被嵌されている。そのリング部材５は、凹陥部８の底面７の中央に対向して水抜孔11が穿設されている。 The lower end edges of each of the pair of magnets 2a are in contact with both rising wall surfaces 6 in the circumferential direction of the recessed portion 8. The magnet holder 18 is press-fitted into the space between the upper end edges of the two magnets 2a (FIG. 2). Thereby, the pair of magnets 2a is positioned and fixed to the inner surface of the housing 4. As shown in FIG. 5, the magnet holder 18 is formed in a U-shape as an example, and is made of a material that can be elastically deformed in a direction in which the U-shaped opening can be expanded and contracted. A ring member 5 is fitted on the outer surface side of the recessed portion 8 of the housing 4. The ring member 5 is provided with a drain hole 11 facing the center of the bottom surface 7 of the recessed portion 8.

（作用）
雨天において、車両のタイヤの撥ね水や巻上げ水により、ファンモータが被水されると、図３に示す如く進入水17が水抜孔11から噴水状に小室10内に進入する。するとこの進入水17は、凹陥部８の底面７に衝突しその水拡散部12によって周方向に分散され、勢いが弱められて小室10内のリング部材５の上面に落下し、大部分が水抜孔11から下方に落下する。また、その一部は水排出孔９からハウジング４の内部に進入するが、すぐにハウジング４の最下位置に戻り水排出孔９から小室10，水抜孔11を介して外部に排出される。 (Function)
In rainy weather, when the fan motor is flooded by splashing water or hoisting water from a vehicle tire, the ingress water 17 enters the small chamber 10 from the drain hole 11 in the form of a fountain as shown in FIG. Then, the ingress water 17 collides with the bottom surface 7 of the recessed portion 8 and is dispersed in the circumferential direction by the water diffusing portion 12, the momentum is weakened and falls onto the upper surface of the ring member 5 in the small chamber 10, and most of the water enters the water. It falls downward from the hole 11. A part of the water enters the inside of the housing 4 through the water discharge hole 9, but immediately returns to the lowest position of the housing 4 and is discharged from the water discharge hole 9 to the outside through the small chamber 10 and the drain hole 11.

なお、水抜孔11から進入するときの進入水17は、凹陥部８の立ち上げ壁面６中央部に水拡散部12が形成されているため、図２および図４から明らかなように水拡散部12の外面に沿って周方向に移動し、その勢いを弱める。この進入水の軸方向への移動は少ないので、軸方向両側にある水排出孔９から、進入水が内部に入ることは少ない。 In addition, since the water diffusion part 12 is formed in the center part of the rising wall surface 6 of the recessed part 8 as the intrusion water 17 when entering from the drain hole 11, as shown in FIGS. 2 and 4, the water diffusion part It moves in the circumferential direction along the outer surface of 12 and weakens its momentum. Since the movement of the incoming water in the axial direction is small, the incoming water hardly enters the interior from the water discharge holes 9 on both sides in the axial direction.

本発明の水抜構造を有するファンモータの一部破断正面図。The partially broken front view of the fan motor which has the drainage structure of this invention. 図１のII−II断面略図。II-II cross-sectional schematic of FIG. 本発明の水抜構造の要部拡大図。The principal part enlarged view of the drainage structure of this invention. 同水抜構造に設けられた凹陥部８の内面側における斜視図。The perspective view in the inner surface side of the recessed part 8 provided in the same drainage structure. 本発明のファンモータの一対のステータ２を位置決めする磁石ホルダ18の一例を示す斜視略図。1 is a schematic perspective view showing an example of a magnet holder 18 for positioning a pair of stators 2 of a fan motor of the present invention.

Explanation of symbols

１ロータ
２ステータ
2a 磁石
３端蓋
４ハウジング
５リング部材
６立ち上げ壁面
７底面
８凹陥部
９水排出孔 1 Rotor 2 Stator
2a Magnet 3 End cover 4 Housing 5 Ring member 6 Rising wall surface 7 Bottom surface 8 Recessed portion 9 Water discharge hole

10 小室
11 水抜孔
12 水拡散部
13 軸受
14 出力軸
15 コイル
16 フランジ部
17 進入水
18 磁石ホルダ 10 Komuro
11 Drain hole
12 Water diffusion part
13 Bearing
14 Output shaft
15 coils
16 Flange
17 Ingress water
18 Magnet holder

Claims

A bottomed cylindrical housing (4) in which a rotor (1) and a stator (2) are housed and an opening is closed by an end cover (3);
In a drainage structure for a fan motor having a ring member (5) that aligns with the outer periphery of the housing (4) and is fitted in a ring shape on the outer periphery to form a motor mounting portion,
A concave portion (8) having a rising wall surface (6) and a bottom surface (7) surrounding the four circumferences on the inner surface side is provided at the lowermost position of the housing (4) at a position facing the ring member (5). ,
The recessed portion (8) is formed in a trapezoidal shape having a height equal to or lower than the height of the stator (2), and is formed on the outer surface side of the center portion of the bottom surface (7) along the circumferential direction of the housing (4). A water diffusion part (12) whose cross section protrudes in an arc shape is provided,
In the axial direction of the housing (4), a pair of the water discharge holes (9) is provided only at the root of the rising wall surface (6) located on both sides of the recessed portion (8),
The stator (2) is composed of a pair of arc-shaped magnets (2a), and the lower edge of each magnet (2a) is positioned on the rising wall surface (6) of the recessed portion (8),
A small chamber (10) is formed between the recessed portion (8) and the ring member (5), and a drain hole (11) is formed in the ring member (5) so as to face the center of the bottom surface (7). ) Is formed, and the fan motor drainage structure is formed.