JPH0717244Y2 - Fan motor drainer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a drainage device for a fan motor, for example,
The present invention relates to a fan motor effectively used as a radiator fan motor mounted in a vehicle.

[Conventional technology]

Radiator fan motors installed in automobiles are equipped with a drainage device to prevent sudden loss of functionality such as locking due to rust due to water ingress into the motor when submerged. . As such a water draining device for a motor, there is a water draining device in which a water draining hole is opened in the bottom portion of a motor housing, and a drain tube is attached to the water draining hole to hang it.

[Problems to be solved by the invention]

However, in such a drainage device for a fan motor, since the drain tube hangs down for a long time, the workability of assembling the fan motor with respect to the shroud is reduced, and it is necessary to deal with the heat generation of the engine, and therefore the heat resistance is high. Because expensive materials are used, the cost is high,
In addition, there is a problem that it hinders the layout of parts in the engine room.

It is an object of the present invention to provide a drainage device for a fan motor that can omit the drain tube.

[Means for solving problems]

A drainage device for a fan motor according to the present invention has a plurality of magnets (11) arranged in an annular shape on an inner peripheral surface of a housing (2) and magnets (11) adjacent to each other. Drainage of a fan motor in which the magnet holders (12) press-fitted between (11) are pressed against each other and held by the elastic force, and the housing (2) has a drainage hole (7). In the device, one of the plurality of magnet holders (12) is arranged so as to face the water drainage hole (7), and the main body (13) of the magnet holder (12) has a width direction. Is curved in an arc shape having an outer diameter substantially the same as the inner diameter of the housing (2), and the rear surface of the main body (13) is arranged so as to contact the inner peripheral surface of the housing (2) and is adjacent to the inner peripheral surface of the housing (2). Matching mug Tsu has been press-fit between the door (11) and (11).

At the position facing the water drain hole (7) of the main body (13),
A waterproof wall is formed by covering the space above the drainage hole (7) with a slight distance between the drainage hole (7) and the internal space of the housing (2) to connect the drainage hole (7) to the internal space of the housing (2). ), A pair of tunnel-shaped parts (16),
The main body (13) is disposed at both ends in the axial direction of the housing (2) on the circumferential centerline of the housing (2), and a part of the main body wall bulges radially inward in the arc shape. The tunnel-shaped portion (16) is integrally formed by being deformed, and the tunnel-shaped portion (16) gradually approaches the inner peripheral surface of the housing (2) as it goes inward from both ends in the axial direction of the housing (2). It is characterized by being inclined so as to do.

[Action]

According to the above-mentioned means, water that has entered the inside of the housing due to an accident such as submersion in water is discharged to the outside through the water passage of the magnet holder → the drainage hole.

Even if water on the housing tries to enter the drain hole, a waterproof wall is formed on the magnet holder arranged to face the drain hole.
It does not enter the inside of the housing.

〔Example〕

FIG. 1 is a front sectional view showing a fan motor draining apparatus according to an embodiment of the present invention, FIG. 2 is an enlarged partial side sectional view thereof, FIG. 3 is a plan view showing a magnet holder, and FIG. FIG. 5 is a sectional view taken along line IV-IV in FIG. 3, and FIG. 5 is a partially cut side view showing the fan motor.

In this embodiment, the water draining device is configured to drain the housing 2 of the fan motor 1. The housing 2 is composed of a yoke 3 formed in a substantially cylindrical shape with one end open and the other end closed, and an end bracket 4 attached to the opening surface of the yoke 3, and detailed description thereof is omitted. However, inside the housing 2, motor components such as a stator 10, an armature 9, a commutator, and a brush device (all not shown) are provided. A flange portion 5 is provided on the opening surface of the yoke 3 so as to project outward so as to be fitted to the end bracket 4, and the motor is provided on the outer periphery of the body portion of the yoke 3 with a shroud 8 (shown by an imaginary line) of a radiator. The stay 6 for attaching to the above is attached to the substantially central portion and fixed. At the bottom of the body of the yoke 3, a water draining hole 7 formed in a substantially circular shape is provided on one side of the stay 6 so as to communicate the inside and outside of the yoke. A cover portion 6a is bulged into a substantially semi-cylindrical shape on the stay so as to cover the drainage hole 7 at a distance.

On the other hand, on the inner peripheral surface of the yoke 3, a plurality of magnets 11 (two magnets in the illustrated example) for constituting the stator 10 are arranged in a ring shape and are fitted between the adjacent magnets 11 and 11. The holder 12 is positioned and fixedly held.

That is, the magnet 11 is integrally formed by using a magnet material such as ferrite and the like in an arc-shaped panel shape having an outer diameter substantially the same as the inner diameter of the yoke 3, and the outer surface of each magnet is the yoke 3. It is arranged so as to contact the inner surface.

The magnet holder 12 is a thin plate made of an elastic material such as steel or resin, and is integrally molded into the shape shown in FIGS. 3 and 4 by an appropriate means such as press working or resin molding. And has a main body 13 formed in a substantially rectangular thin plate shape. The main body 13 is curved in an arc shape having an outer diameter substantially the same as the inner diameter of the yoke 3 in the width direction, and four pressing pieces 14 are arranged at both end portions in the width direction. , Both ends of the main body are bent inward in a radial direction of the circular arc with a constant width by a predetermined angle, respectively. Positioning claws 15 are arranged at the outer end portions of these pressing pieces 14,
It is integrally provided by being bent outward at a substantially right angle in the circumferential direction.

The magnet holder 12 formed in this way has a body 13
Is arranged so that the back surface of the inner peripheral surface of the yoke 3 abuts,
It is press-fitted between the adjacent magnets 11 and 11. In this press-fitted state, the pressing piece 14 of the magnet holder 12 is relatively pressed in the circumferential direction by the side surface of the magnet 11 and is compressed and deformed, so that the pressing piece 14 and the magnet 11 are pressed against each other. The magnet holder 12 is positioned and fixed while being pressed against the inner peripheral surface of the yoke 3. At this time, since the positioning claws 15 of the magnet holder 12 are engaged with the four corners of the magnet 11 from the outside, the magnet 11 is positioned and held in the axial direction of the yoke 3.

In this embodiment, one of the magnet holders 12 is arranged so as to face the water draining hole 7 formed in the bottom portion of the yoke 3, and the magnet holder 12 has a passage for discharging water in the housing. A water channel and a waterproof wall for preventing water from entering through the drain hole 7 are integrally formed.

That is, a pair of tunnel-shaped portions 16 are provided in the main body 13 of the magnet holder 12 arranged so as to face the drainage hole 7.
The main body 13 is arranged at both ends in the length direction (axial direction of the yoke 3) on the center line in the width direction (circumferential direction of the yoke 3). The circular arc shape is integrally molded by being bulged and deformed inward in the radial direction. The tunnel-shaped portion 16 is formed to be constant in the width direction, but is inclined so as to gradually approach the inner peripheral surface of the yoke 3 as it goes inward from both ends in the length direction. The tunnel-shaped portion 16 substantially forms a waterproof wall by covering the space above the drainage hole 7 with a slight distance, and the internal space of the tunnel-shaped portion 16 allows the water passage 17 to drain water. The hole 7 is formed so as to communicate with the internal space of the housing.

Engaging claws 18 are provided on the ceiling wall of the tunnel-shaped portion 16 as a waterproof wall.
Has been cut down a part of it and is projected integrally.
The engaging claw 18 is inserted into the water draining hole 7 so as to cross the water draining hole 7 to engage with a part of the water draining hole 7. By crossing the drainage hole 7, the engaging claw 18 substantially constitutes a part of the drainage hole 7 together with the tunnel shape 16, and by engaging with a part of the drainage hole 7. The function of positioning the magnet holder 12 on the yoke 3 is demonstrated.

Next, the operation will be described.

Water that has entered the housing 2 due to an accident such as submersion of water gathers at the bottom of the housing 2 and the water passage 17 of the tunnel-shaped portion 16 →
The water is drained to the outside of the housing 2 through the water drain hole 7. At this time, since the water passage 17 is inclined outward from the central portion toward the edge portion, the water is completely discharged without remaining inside the tunnel-shaped portion 16.

On the other hand, in the state where the housing 2 is attached to the radiator, first, the housing 2 is exposed to the round frame 8 (shown by an imaginary line) of the shroud and the covering portion 6a of the stay 6, so that the drain hole 7 is formed. Therefore, water is prevented from entering the housing 2 through the drain hole 7.

In the unlikely event that water that has passed through the round frame of the shroud is housing 2
When it is in the front-back direction, one side is blocked by the stay 6 and therefore does not enter the water drain hole 7.
Even if the water goes into the drain hole 7, the water is blocked by the engaging portion 18 inserted so as to traverse the drain hole 7, and further blocked by the tunnel-shaped portion 16 as a waterproof wall. Therefore, it will not penetrate deep inside.

According to the above embodiment, the following effects can be obtained.

(1) Since the magnet holder having the water passage and the waterproof wall is attached to the drain hole, it does not expand in the radial direction of the housing unlike the structure of the drain tube, and the fan motor can be attached to the shroud of the fan motor. The assembling property is improved and the occupation space can be reduced.

(2) Since the water passage and the waterproof wall are integrally formed in the magnet holder, it is possible to avoid an increase in the number of parts and the number of assembling steps.

(3) By inserting the waterproof wall into the water drain hole so as to cross the water drain hole, it is possible to prevent water from entering through the water drain hole and position the magnet holder with respect to the yoke. Therefore, the structure can be further simplified.

(4) By disposing the water drain hole and the magnet holder so as to face the stay of the housing, and by installing the fan motor on the shroud of the radiator,
Since the water drainage hole and the water drainage device are surrounded by the motor mounting round frame of the shroud, the water infiltration prevention effect can be further enhanced.

FIG. 6 is an enlarged partial front sectional view showing another embodiment of the present invention, FIG. 7 is a side sectional view thereof, and FIG. 8 is a plan view thereof.

This embodiment is different from the previous embodiment in that the magnet holder
At both ends of the tunnel-shaped portion 16A formed as a waterproof wall in 12A, waterproof side walls 19 are cut down at both ends of the ceiling wall in the tunnel-shaped portion 16A, and are disposed on both sides in the axial direction of the drain hole 7, respectively. The engaging claw has a drain hole 7
It is a point that is not inserted inside. Therefore, the engaging claw 18
Instead of positioning the magnet holder 12A by the above, a plurality of engaging claws 20 are provided on a part of the yoke 3 so as to be engaged with one end side of the magnet holder 12A for positioning.

The present invention is not limited to the above embodiment,
It goes without saying that various modifications can be made without departing from the spirit of the invention.

For example, the shape, structure, etc. of the main body of the magnet holder, the pressing piece, the positioning claw, the water passage, and the waterproof wall are not limited to those in the above-mentioned embodiment, and may be appropriately changed according to the shape, structure, etc. of the housing, magnet, drain hole. It is desirable to select it.

In the above embodiment, the case where the invention is applied to the fan motor of the radiator has been described, but the present invention is not limited to this and can be applied to a fan motor of a condenser in a cooling device.

[Effect of device]

As described above, according to the present invention, the drain tube can be omitted, and the water in the housing can be reliably discharged, and the infiltration of water from the outside to the inside can be surely prevented.

[Brief description of drawings]

FIG. 1 is a front sectional view showing a fan motor draining apparatus according to an embodiment of the present invention, FIG. 2 is an enlarged partial side sectional view thereof, FIG. 3 is a plan view showing a magnet holder, and FIG. FIG. 3 is a sectional view taken along line IV-IV of FIG. 3, and FIG. 5 is a partially cut side view showing the fan motor. FIG. 6 is an enlarged partial front sectional view showing another embodiment of the present invention, FIG. 7 is a side sectional view thereof, and FIG. 8 is a plan view thereof. 1 ... Fan motor, 2 ... Housing, 3 ... Yoke, 4 ...
End bracket, 5 ... Flange part, 6 ... Stay, 7 ...
Drainage hole, 8 ... Shroud, 9 ... Armature, 10 ... Stator, 11 ... Magnet, 12 ... Magnet holder, 13 ...
Main body, 14 ... Retaining piece, 15 ... Positioning claw, 16 ... Tunnel shaped part (waterproof wall), 17 ... Water passage, 18 ... Engaging claw, 19 ... Waterproof side wall, 20 ... Engaging claw.

Claims (3)

[Scope of utility model registration request] 1. A plurality of magnets (11) are annularly arranged on an inner peripheral surface of a housing (2), and the magnets (11) are press-fitted between adjacent magnets (11). In the drainage device for a fan motor, which is pressed against each other by the elastic force of each magnet holder (12) and held, and has a drainage hole (7) formed in the housing (2), One of the magnet holders (12) is arranged so as to face the water drainage hole (7), and the main body (13) of the magnet holder (12) has the width direction of the housing (2). It is curved in an arc shape having an outer diameter substantially the same as the inner diameter, and is arranged so that the back surface of the main body (13) abuts on the inner peripheral surface of the housing (2) and an adjacent magnet (11) ( 11) pressure between It is, at a position facing the drainage holes (7) of the body (13),
A waterproof wall is formed by covering the space above the drainage hole (7) with a slight distance between the drainage hole (7) and the internal space of the housing (2) to connect the drainage hole (7) to the internal space of the housing (2). ), A pair of tunnel-shaped parts (16),
The main body (13) is disposed at both ends in the axial direction of the housing (2) on the circumferential centerline of the housing (2), and a part of the main body wall bulges radially inward in the arc shape. The tunnel-shaped portion (16) is integrally formed by being deformed, and the tunnel-shaped portion (16) gradually approaches the inner peripheral surface of the housing (2) as it goes inward from both ends in the axial direction of the housing (2). A drainage device for a fan motor, which is inclined so that 2. An engaging claw (18) is integrally cut out on a ceiling wall of the tunnel-shaped portion (16) by cutting a part of the engaging claw (18), and the engaging claw (18) is a drain hole. A drainage device for a fan motor according to claim 1, characterized in that it is inserted into (7) so as to traverse it and is engaged with a part of the drainage hole (7). . 3. Watertight side walls (19) are provided at both ends of the tunnel-shaped portion (16A) so that both ends of the ceiling wall of the tunnel-shaped portion (16A) are cut down to both sides in the axial direction of the drainage hole (7). The water drainage device for a fan motor according to claim 1, characterized in that the water drainage device is provided for each of the utility models.