JPH0833256A - Drain structure for motor - Google Patents

Abstract

PURPOSE:To provide a drain structure for a motor in which intrusion of water is prevented when the frozen water at the forward end part of a drain is melted as well as when the motor is splashed with water. CONSTITUTION:A drain provided on the side face of a motor 2 body for the purpose of drainage or ventilation comprises a tube body 3 communicating the inside and outside of the motor 2, and a cover 4 surrounding the tube body 3. The forward end of the tube body 3 is located at a position deeper than the forward end of the cover 4 and a slit 1 is made in the cover 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drain provided for drainage and ventilation of a motor, and more particularly to a type installed at a place where water may splash or freeze.

[0002]

2. Description of the Related Art Generally, a motor installed in a place where water may be splashed, such as a vehicle-mounted motor, is provided with a drain for draining water entering the motor and for aeration of the inside and outside of the motor. ing.

For example, as shown in FIG. 5, a tubular body (drain) 11 communicating with the inside of the motor is provided on the side surface of the motor 10 which is the lower side when the motor 10 is installed. The tip of the tubular body 11 is cut diagonally, and two baffle plates 12 are provided inside the tubular body 11.

Here, it is assumed that the motor 10 is splashed with water. Water travels along the F direction from the motor body through the pipe body 11 to form a water film in the opening 13 of the pipe body 11. At the same time, the motor in a high temperature state (for example, about 50 to 80 degrees) is cooled by being splashed with water, and a negative pressure is generated inside.

As a result, the water film passes through the tube body 11 and is sucked up into the motor, so that water enters the inside of the motor. Then, the invading water adheres to the bearings and the contacts and causes malfunctions such as poor rotation.

On the other hand, in an environment where freezing occurs, the problems shown in FIGS. 6 and 7 occur. That is,
When a member such as the bracket 14 is present on the lower side of the pipe body 11, ice (snow) 15 may be formed on the member. In this case, the pipe 11 may be blocked by the ice 15. However, if the ice 15 is thawed by the exhaust heat of the motor 10 or the like, the tip of the pipe 11 is submerged.

[0007]

As described above, in the above-mentioned conventional device, water is introduced into the motor in addition to the case where the motor is splashed with water and the freezing of the periphery of the motor and snow accumulation and its melting. It may end up. Especially in the latter case, there is a possibility that the inside of the motor cannot be sucked and discharged during freezing.

The present invention has been made in view of the above matters, and it is possible to prevent not only when the motor is splashed with water but also the intrusion of water due to freezing and thawing of the drain tip portion, and the clogging of the drain. It is a technical object to provide a drain structure for such a motor.

[0009]

In order to solve the above technical problems, the present invention provides a motor 2 for drainage or ventilation.
The drain provided on the side surface of the main body has the following configuration.

That is, in the first configuration, the motor 2
It is composed of a tubular body 3 communicating with the inside and outside, and a cover 4 surrounding the tubular body 3, and the tip of the tubular body 3 is located deeper than the tip of the cover 4.

Then, the slit 1 is formed in the cover 4. The slit 1 is preferably provided along the longitudinal direction of the tube body 3, and may be formed up to the tip of the tube body 3 or may be an elongated hole. Further, it is preferable that the slit 1 is formed up to the base portion of the cover 4 (the proximal portion of the motor 2).

The tubular body 3 and the cover 4 can be integrally formed of metal or synthetic resin. Also, the tubular body 3
The tip of the cover or the tip of the cover 4 may be cut obliquely. Further, in addition to the above configuration, a baffle plate 6 may be provided inside the tube body 3. The baffle plate 6 can be provided, for example, so as to partition the inside of the tubular body 3 with a half-moon plate.
Water resistance and dust proofing effect will be improved by installing a plurality of them alternately.

In the second structure, the through hole 5 is formed in the portion which is the slit 1 in the first structure. This through hole 5 is preferably provided at the base of the cover 4. The cover 4 does not necessarily have to be circular, but can be oval or polygonal.

[0014]

In the first structure, since the tip of the tube 3 is located deeper than the tip of the cover 4, the tube 3 is prevented even when water drops along the outer wall of the cover 4.
The tip of the is not splashed with water.

By forming the slit 1 on the cover 4, even if the opening of the cover 4 is frozen or submerged in water, the intake and exhaust from the pipe body 3 is performed from the slit 1. Therefore, the water is not sucked into the motor 2.

Further, in the second structure, the through hole 5 provided in the cover 4 functions similarly to the slit 1 in the first structure so that the pipe 3 is sucked and exhausted.

[0017]

【Example】

<First Embodiment> A first embodiment of the present invention will be described with reference to FIGS.

The present invention relates to the structure of the drain provided on the side surface of the motor body for draining or aeration. As shown in FIG. 1, the drain A is provided at a position which will be the lower surface of the motor 2 when the motor 2 is attached at a predetermined position. A tube body 3 communicating with the inside of the motor 2 and a cover 4 formed so as to surround the tube body 3 are integrally molded of metal or synthetic resin.

The tubular body 3 has a circular cross section and connects the inside and the outside of the motor 2 and is provided through a mounting hole 2a provided on the side surface of the motor 2. Then, it is fixed to the mounting hole 2a by a stopper 3a provided at one end of the tubular body 3.

Two baffle plates 6 are provided inside the tube body 3. The baffle plates 6 are half-moon shaped plates that are vertically opposed to each other and are arranged to face each other, so that water and dust can be prevented from entering the inside of the motor 2 and a waterproof and dustproof effect can be obtained. Further, the tip of the tubular body 3 is obliquely cut at an angle of about 30 degrees, which makes it difficult to form a water film.

A cover 4 extends from the periphery of the base of the tubular body 3. The cover 4 has a circular shape similar to the tubular body 3, and its outer diameter is set to be about twice the outer diameter of the tubular body 3. The tip of the tube 3 is located deeper than the tip of the cover 4, and the entire length of the tube 3 is about 1/3 of the entire length of the cover 4. And, the cover 4 is a vertical wall parallel to the tube body 3, that is,
It is a straight pipe and is formed coaxially with the tubular body 3. The cover 4 has slits 1 along its longitudinal direction.
Are formed. The slit 1 is formed so as to open from the height near the lower end of the tubular body 3 to the lower edge of the cover 4.

In the above structure, it is assumed that the motor 2 is splashed with water. In this case, since the tip of the tube body 3 is located deeper than the tip of the cover 4, water is not sucked from the tube body 3. Since the cover 4 has a large outer diameter, no water film is formed on the lower end.

On the other hand, as shown in FIG. 1, a case where a bracket 14 is present on the lower side of the tubular body 11 and ice (snow) 15 is formed on the bracket 14 will be described. This bracket 14
May be for mounting the motor 2, or may be, for example, the floor of the vehicle. In short, it means a member existing relatively close to the lower side of the pipe body 11.

When such a bracket 14 is present, ice 15 grows on the bracket 14 (or snow enters between the bracket 14 and the motor 2) and the cover 4 is closed by the ice 15. There is fear. However, since the tip of the tube body 3 is located deeper than the tip of the cover 4, water is not sucked from the tube body 3. Further, even if the tip of the cover 4 is blocked with ice 15, intake and exhaust from the tube body 3 is performed through the slit 1.

When the ice (snow) 15 is thawed by the exhaust heat of the motor 2 or the like, the tip of the pipe 11 is submerged in water, but the inside of the cover 4 communicates with the atmosphere through the slit 1. Therefore, there is no risk of sucking water from the pipe body 3.

Although it is desirable to provide the baffle plate 6, sufficient waterproofness can be obtained without it. <Second Embodiment> A second embodiment of the present invention will be described with reference to FIGS.

In this embodiment, a through hole 5 is provided in the cover 4 instead of the slit 1 in the first embodiment. The through hole 5 is formed in a circular shape at the base of the cover 4. Therefore, even when the tip of the cover 4 is blocked with ice or submerged in water, the tube body 3 is processed in the same manner as in the first embodiment.
There is no hindrance to the intake and exhaust of air, and no water enters.

In this embodiment, as compared with the slit-provided one, the strength of the cover 4 is less likely to be lowered, and moreover, water is less likely to enter the cover 4 even under a severe environment such as a storm. is there.

The other structures and operations are the same as those of the above-mentioned embodiment, so that the same reference numerals are given and the description thereof is omitted.

[0030]

According to the first aspect of the present invention, since the tip of the tube is located deeper than the tip of the cover, the tip of the tube is not splashed with water and is excellent in waterproofness. ing. Further, by forming the slits in the cover, even if the opening of the cover is frozen or submerged in water, the slits can suck and exhaust air, and also prevent water from being sucked into the motor.

In addition, in the structure of claim 2, in addition to the same effect as the structure of claim 1, since the through hole is formed in the cover, the strength of the cover is not lowered so much and the water is covered. It has the effect that it is difficult to enter inside.

[Brief description of drawings]

FIG. 1 is a side view of an entire motor with a part cut away showing a first embodiment of the present invention.

FIG. 2 is a rear view of the entire motor showing the first embodiment of the present invention.

FIG. 3 is a sectional view of a main part showing a second embodiment of the present invention.

FIG. 4 is a rear view of an essential part showing a second embodiment of the present invention.

FIG. 5 is a side view of an entire motor with a part cut away showing a conventional drain structure of the motor.

FIG. 6 is a partially cutaway side view showing a conventional motor drain structure in a use state.

FIG. 7 is a rear view showing a conventional motor drain structure in a use state.

[Explanation of symbols]

 1 ・ ・ Slit 2 ・ ・ Motor 2a ・ ・ Mounting hole 3 ・ ・ Tube 3a ・ ・ Stopper 4 ・ ・ Cover 5 ・ ・ Through hole 6 ・ ・ Baffle plate 14 ・ ・ Bracket 15 ・ ・ Ice (snow) A ・ ・drain

Claims (2)

[Claims] 1. A drain provided on a side surface of a motor main body for draining or aerating, comprising a tubular body communicating with the inside and outside of the motor, and a cover surrounding the tubular body, and a tip of the tubular body. A drain structure for a motor, characterized in that it is located deeper than the tip of the cover and a slit is formed in the cover. 2. A drain provided on a side surface of a motor body for draining or venting, comprising a pipe body communicating with the inside and outside of the motor and a cover surrounding the pipe body, and the tip of the pipe body is A drain structure for a motor, characterized in that the through hole is formed in the cover while being located deeper than the tip of the cover.