JPS626316Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a motor fan that prevents water and dust from entering the motor, and actively introduces outside air into the motor for cooling.

[Conventional technology]

A motor fan is known as a blower in which the fan is directly fixed to the output shaft of a motor serving as a power source. When this type of motor fan is operated continuously, the surface temperature of the heat generating parts inside the motor, such as the shaft bearing, reaches as high as 110°C.
Alternatively, window openings are formed on the side circumferential surface, and the motor is cooled by natural circulation of outside air through these window openings.Also, for example, Japanese Utility Model Application No. 14205/1983 discloses a radiator cooling fan. As described in the publication, a plurality of blades are provided on the outer periphery of a large-diameter outer ring, and the outer ring and the boss are connected by a connecting plate that acts as a blade, so that when the fan is operating, the connecting plate actively The motor was cooled by blowing outside air into the motor and cooling the casing from the outside.

[Problem that the invention attempts to solve]

However, motor fans are used as motor fans for cooling radiators or as ventilation systems in factories, and are often installed in locations with relatively large amounts of water and dust. Even if a motor is installed to cool the motor, the reality is that no means are taken to prevent water and dirt from entering the motor.

In order to prevent water and dust from entering the motor, for example, if a cover is installed to cover the motor, water and dust can be prevented from entering the motor, but on the other hand, the introduction of outside air to the motor is blocked. ,
It was not possible to cool the motor properly.

In addition, in the case of a motor device in which the motor body is indirectly cooled by blowing air into the motor casing and cooling the casing from the outside, if the motor is small and generates a small amount of heat, Although this method is effective, it has the disadvantage that motors with a slightly large amount of heat cannot be cooled sufficiently.

[Purpose of invention]

This invention was devised in view of the actual situation,
It is an object of the present invention to provide a motor fan that prevents water and dust from entering the motor and actively introduces outside air into the motor, thereby having a good cooling effect.

[Means for solving problems]

In order to achieve such an object, the present invention provides a motor fan consisting of a motor having a window opening at least at an end on the output shaft side of a casing enclosing a motor body, and a fan fixed to the output shaft of this motor. , at least one window opening is provided at each end of the casing in the axial direction, and a cover portion is formed at the base of the fan to cover the end on the output shaft side, and suction blades are arranged in parallel within the cover portion. The outside air sucked in by the suction blade when the fan is rotated can be forced into the motor through the window opening.

[Effect of invention]

According to the present invention, the cover prevents water and dust from entering the motor, and the outside air sucked in by the suction blade when the fan is rotated is forced into the motor through the window opening. Ru.

[Example of idea]

Hereinafter, embodiments of the present invention will be described in detail based on FIGS. 1 and 2.

In the figure, 1 is a motor as a power source, and this motor 1 has an appropriate number of window openings 2 and 3 communicating with the inside on both end sides of its casing 1a, with one window opening 2 being formed. An output shaft 4 is taken out from the end.

Further, the fan 5 has a cover part 7 around the boss part 6 fixed to the output shaft 4, which covers the end part including the window opening 2 from the outside. A plurality of suction vanes 8 are arranged in parallel to introduce outside air into the cover part 7 when the blade 5 is rotated. Then, on the outer circumferential surface of the cover portion 7, as in the conventional case,
Air blowing blades 9 are provided in a protruding manner to carry out the original air blowing action.

Since this embodiment is configured in this way, when the motor 1 is energized to rotate the fan 5 fixed to the output shaft 4, the air blowing blades 9 perform the same air blowing action as in the conventional case. On the other hand, as the suction blade 8 rotates, the air inside the cover part 7 is agitated and flows, but since the front (right side in Figure 1) and the sides are blocked, the air flows backward and forward. The liquid flows downward through the window opening 2 at the output shaft side end of the casing, and is forced to flow through the window opening 3 at the rear end. With this air flow, air around the motor is smoothly sucked into the cover part 7. In this way, the heat generating portion of the motor body 1b is cooled well. Further, according to this embodiment, although some dust and the like enters the motor 1 when the outside air is introduced into the motor 1 by the suction blade 8,
Since the end portion of the motor including the window opening 2 is covered with the cover portion 7, a large amount of water and dust is prevented from entering into the motor 1.

Therefore, according to this embodiment, it is possible to prevent water, dust, etc. from entering the motor, and it is also possible to effectively cool the heat generating portion inside the motor. In addition, since the suction blade 8 is provided integrally with the fan 5, there is no need to add any special structure, and the suction blade 8 may be integrally molded from, for example, synthetic resin, making it easy to manufacture.

[Effect of idea]

As described above, according to the present invention, it is possible to prevent water, dust, etc. from entering the motor, and it is also possible to effectively cool the heat generating portion inside the motor.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view of an embodiment of the present invention, and FIG. 2 is a perspective view of the main parts. 1...Motor, 1a...Casing, 1b...
Motor body, 2, 3...window opening, 4...output shaft,
5...Fan, 6...Boss part, 7...Cover part, 8
...Suction blade, 9...Blower blade.

Claims (1)

[Scope of utility model registration request] In a motor fan consisting of a motor having a window opening at least at an end on the output shaft side of a casing containing a motor body, and a fan fixed to the output shaft of this motor, a window opening is provided at both ends of the casing in the axial direction, respectively. At least one window opening is provided, and at the same time a cover part is formed at the base of the fan to cover the output shaft side end, and suction blades are arranged in parallel in this cover part, so that when the fan is driven to rotate, the suction blades draw air. A motor fan characterized in that outside air can be forced into the motor through the window opening.