JPH0286998A - Blower - Google Patents

Abstract

PURPOSE:To secure such a blower that is low in a temperature rise, high in strength of a blade and excellent in reliability and service life by installing each recess part in open ends of a boss part of the blade at the blade side, while setting up an end of the blade in a projection being formed between these recess parts. CONSTITUTION:When air is inhaled from a base block 1 on one side and sent to it on the other, air lying between a stator 4 and the sticking surface 8c of a turning shaft 7 of a boss part 8 is stirred by a stirring rib 14 and thereby heat exchange being produced by the stator 4 is made so better. The air raised in temperature by the heat exchange is entered in a vent passage 13 from a clearance of a base 12, and then it is discharged to the outside of a blade 8 from a recess 15 at an end of the boss part 8a. On the other hand, from the outside of the blade 8, it is inhaled in the boss part 8a from a clearance between the stator 4 and a rotor magnet 10 as cooling the stator 4. At this time, since the recess 15 is installed and an open area is large enough, a cooling effect becomes enlarged. In addition, since an end of a blade 8b is set up so as to become a projection 16, strength is also enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a blower used for cooling electronic equipment and the like.

[Conventional technology]

FIG. 7 is a sectional view showing a conventional blower disclosed in, for example, Japanese Utility Model Application Publication No. 62-173595.
) is a base forming a casing, and a holder (2) is provided in the center. (3) is a bearing consisting of a ball bearing fitted into this holder, (4) is the above holder (2)
A stator (7) consisting of a stator core (5) provided on the outer peripheral side wall of the stator and a coil (6) wound around this core.
(8) is a rotary shaft that fits into the bearing (3) and is rotatably provided, and (8) is a boss that is fixed to this rotary shaft and whose open end is flush with the stator f4 so as to cover the stator f4. The blade has a portion (8a) and a wing (8b) on the outer peripheral side, and is molded from synthetic resin. (9) is a rotor yoke provided on the surface of the boss portion (8a) facing the stator (4), and (10) is a rotor magnet provided on the rotor yoke and facing the stator (4).

A conventional blower is configured as described above, with a stator (4)
By energizing the coil (6), a magnetic field is generated,
Due to the magnetic action with the rotor magnet 00), the blades (8)
It rotates around the rotating shaft (sword) to blow air.

[Problem to be solved by the invention]

In the conventional blower as mentioned above, the rotor magnet α0
) and the stator (4) is formed as small as possible from the viewpoint of efficiency, and since the open ends of the boss portion (8a) are formed on the same plane, the gap between the host portion (8b) of the stator (4)
), the amount of heat generated within them is small, resulting in a high temperature rise, resulting in poor reliability and service life.

This invention was made to solve the problem,
Low temperature rise, high blade strength, reliability,
The purpose is to obtain a blower with a long life.

[Means to solve the problem]

In the blower according to the present invention, a concave portion recessed toward the blade side of the blade is provided at the open end of the boss portion of the blade.

Further, the end portions of the blades are disposed in the convex portions formed between the concave portions.

[Effect]

In this invention, since the open end of the boss portion of the blade is provided with a recess that is recessed toward the blade side of the blade, the heat in the boss portion can be released easily, and cooling air can easily enter the stator side. , temperature rise can be kept low.

Furthermore, since the end portions of the blades are disposed on the convex portions formed between the concave portions, the blades can be made longer and their strength can be increased.

〔Example〕

Fig. 1 is a sectional view showing one embodiment of the present invention, Fig. 2 is a perspective view showing half of the boss portion of the blade, Fig. 3 is a front view showing the boss portion, and Fig. 4 is the same. It is a side view of the blade, (1) to θO) show the same or equivalent parts as the above conventional example, and (11) shows a boss part (8a) on the inner surface of the boss part (8a).
) and a plurality of boss ribs protruding radially from the center of the rotating shaft (7) on the stator (4) side by integral molding, (12) is a pedestal that is linearly connected to this boss rib and protrudes from the lower part of the boss rib, A rotor yoke (9) formed in a ring shape with a cross section is provided on the upper surface of the pedestal and the tip of the boss rib, and a pedestal (12) is provided between the rotor yoke (9) and the inner peripheral side wall of the boss portion (8a). A ventilation path (13) is formed from the end to the end of the boss rib (11). (14) is connected to the lower part of this pedestal, the boss rib (11) and the pedestal (12) have a predetermined angle, and the boss rib (11) and the pedestal (12) protrude from the rotation axis (g) fixing surface (8c) of the boss part (8a). an agitation rib (14) provided at the open end of the boss portion (8a) on the base (1) side;
(15) is a convex portion formed between the concave portions, and the wing (8b)
The end portion of is arranged to form this convex portion.

In the blower configured as described above, the blades rotate as in the conventional example, sucking air from one side of the base (1) and blowing air to the other side. At this time, the air between the stator (a) and the fixing surface (8c) of the rotating shaft (7) of the boss part is removed from the stirring rib (
The air that is stirred by the stator (14) to improve the heat exchange generated by the stator (4), and whose temperature has increased due to the heat exchange, enters the air passage (13) from between the pedestals (12) as shown by the broken line arrow, and passes through the boss (14). 8a) End recess (15) rattle (8)
released outside. On the other hand, air is drawn from outside the blade (8) into the boss portion (8a) through the gap between the stator (4) and the rotor magnet 00) while cooling the stator (A).

At this time, the stirring rib (14), the pedestal (12), and the boss rib (11) have the function of blowing blades, and the amount of air blown is large. ), and the amount of air blown out from the air passage (13) to the outside is large, increasing the cooling effect. Also, wings (8
Since the end portion of b) is disposed so as to form a convex portion (16), the blade (8b) can be lengthened, a large amount of air can be obtained, and the strength can be increased.

By cooling the stator (4) in this manner, the temperature rise of the stator (4) is suppressed to a low level, improving reliability and service life.

In addition, in the above embodiment, the stirring rib (14) and the pedestal (
12), but the purpose can be achieved even without it.

In addition, the shapes, angles, etc. of the boss rib (11), the pedestal (12), and the stirring rib (14) are not limited to those in the above embodiment, and as shown in FIG. All of the ribs (14) may be formed radially from the center of the rotation axis ('71).

Furthermore, only the boss rib (11) is formed radially from the center of the rotation axis (71), and the pedestal (12) and stirring rib (14) are formed linearly and are provided at a predetermined angle with the boss rib (11). Alternatively, only the pedestal (12) may be formed radially from the center of the rotating shaft (71), and the boss ribs (11) and stirring ribs (14) may be provided at a predetermined angle with respect to the pedestal (12). It's okay.

Also, only the stirring ribs (14) are formed radially from the center of the rotating shaft (7), and the boss ribs (11) and the pedestal (12) are formed radially from the center of the rotating shaft (7).
) may be formed linearly and provided at a predetermined angle with the stirring rib (14).

Furthermore, the pedestal (12) and stirring ribs (14) are formed linearly radially from the center of the rotating shaft (7), and the boss ribs (
11) may be formed at a predetermined angle with respect to the base (12).

Further, the boss rib (11), the pedestal (12), and the stirring rib (14) may all be formed at a predetermined angle with respect to the center of the rotating shaft (7).

Furthermore, as shown in Fig. 6, the boss rib (11) and the pedestal (
12) and the stirring rib (14) may be provided separately without being provided in succession.

Further, the angles, shapes, etc. in each of the above are not limited to these, and may be set according to the rotation direction, rotation speed, etc. of the blade (8).

〔Effect of the invention〕

Since the present invention is configured as described above, a large amount of cooling air can flow especially to the stator section covered with the vane boss section, and therefore, temperature rise can be kept low.
Improved reliability and service life.

In addition, the blades can be formed long and a large amount of air can be obtained, and the strength of the blades can be increased.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a perspective view showing half of the boss portion (8a) of the blade (8).
FIG. 3 is a front view showing the boss portion (8a), FIG. 4 is a side view of the blade (8), and FIG. 5 is a front view of the blade (8) showing another embodiment of the invention. ), FIG. 6 is a front view of the vane (8) and boss portion (8a) showing still another embodiment of the present invention, and FIG. 7 is a sectional view showing a conventional blower. In addition, the same reference numerals in each figure indicate the same or equivalent parts.
21 is a holder, (3) is a bearing, (4 is a stator, (71)
is the rotating shaft, (8) is the blade, (8a) is the boss, (8c) is the fixed surface, (9) is the rotor yoke, α0) is the rotor magnet, (11) is the boss rib, (12) is the pedestal, (13)
Ventilation passage, (14) stirring rib, (15) recess, (1
6) is a convex portion. Figure 1

Claims (2)

[Claims] (1) A holder, a bearing fitted in this holder, a stator provided in the holder, a rotating shaft fitted in the bearing and rotatably provided, and a circumferential side fixed to this rotating shaft. a blade having a boss portion formed to cover the stator; a rotor yoke provided on a surface of the boss portion facing the stator; and a rotor magnet provided on the rotor yoke and facing the stator. A blower comprising: a concave portion recessed toward the blade side of the blade at the open end of the boss portion of the blade. (2) The blower according to claim 1, wherein the end portion of the blade is disposed in a convex portion formed between the concave portions.