JPH05111211A - Motor - Google Patents

Abstract

PURPOSE:To obtain a motor, whose fin structure is not dependent on the providing direction of the motor and the flowing direction of a cooling fluid and moreover can radiate efficiently the heat generated by the motor. CONSTITUTION:On the outer periphery of a main body 1 of a motor, mounted is a spiral fin 11 which slews around the center line of the rotational shaft of the motor. When cooling the motor by making a fluid flow through the outer periphery of the motor, even though the fluid is made to flow not only in parallel with the center line of a rotational shaft 4 of the main body 1 of the motor but also in the direction vertical to the center line, the fluid can flow along the spiral fin 11. Therefore, the main body 1 of the motor can be prevented from overheating. Also, there is no necessity for providing the motors whose fin structures are different from each other according to the providing directions of the motors and the flowing directions of cooling fluids. Therefore, the standardization of parts is made executable, and process managements are made simple. As a result, the effect of lowering the cost of the motor is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric motor having a heat radiation fin.

[0002]

2. Description of the Related Art FIG. 5 is a front view showing a conventional electric motor, and FIG.
FIG. 4 is a right side view showing the electric motor. In the figure, 1 is a motor body, 2 is a cable for connecting a power source 3 to the motor body 1, 4 is a rotary shaft protruding from an end face of the motor body 1, 5 is an outer periphery of the motor body 1, and a center line of the rotary shaft 4. On the other hand, it is a radiation fin provided radially.

The conventional electric motor is constructed as described above, and the power source 3 is applied to the electric motor main body 1 by the cable 2, converted into rotational energy, and transmitted to the outside by the rotating shaft 4. During operation of the electric motor, a cooling fan (not shown) or the like blows air to the electric motor main body 1 in a direction parallel to the center line of the rotating shaft 4, that is, in the arrow A1 direction or the A2 direction in FIG. The wind flows around the outer periphery of the electric motor main body 1 along the heat radiation fins 5, takes away the heat generated in the electric motor main body 1, and suppresses overheating of the electric motor main body 1. As a technique similar to the conventional example, Japanese Patent Laid-Open No. 59-61444 is used.
There is one shown in Japanese Patent Publication.

FIG. 7 is a front view showing another conventional electric motor, and FIG. 8 is a right side view showing the same electric motor. In this conventional example, a cooling fin 5 is provided on the outer periphery of the electric motor body 1 in a direction perpendicular to the center line of the rotating shaft 4. In this conventional example, a cooling fan (not shown) is used during operation of the electric motor.
8 is blown to the motor body 1 in a direction perpendicular to the center line of the rotating shaft 4, that is, in the direction of arrow B1 or B2 in FIG. Along with this, overheating of the motor body 1 is suppressed.

[0005]

As described above, in the conventional electric motor, even if the electric motor main body 1 has the same electric characteristics, it is necessary to prepare electric motors having different fin structures depending on the installation direction of the electric motor and the blowing direction of the cooling air. There is a problem that the cost of the electric motor increases because standardization of parts cannot be performed and process management becomes complicated.

The present invention has been made to solve the above problems, and can efficiently dissipate the heat generated in the electric motor main body, without depending on the installation direction of the electric motor and the flowing direction of the cooling fluid. The purpose is to obtain an electric motor having a fin structure.

[0007]

An electric motor according to the present invention is provided with a spiral-shaped fin on the outer periphery of an electric motor main body, the spiral fin rotating around its rotation axis.

Further, another electric motor according to the present invention comprises a large number of rod-shaped fins projecting in the radial direction around the rotation axis of the electric motor main body 1 on the outer periphery thereof.

[0009]

According to the present invention, since the spiral fin that swivels around its rotation axis or a large number of rod-shaped fins that protrude in the radial direction around the rotation axis are provided on the outer periphery of the electric motor main body, the operation of the electric motor can be performed. Even if the cooling fluid is flown not only in the direction parallel to the center line of the rotating shaft of the motor body but also in the vertical direction, the spiral fins or the many rod-shaped fins do not hinder the flow and are cooled by the cooling fluid. It

[0010]

Embodiment 1 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing an embodiment of the present invention, and FIG. 2 is a right side view showing the embodiment. In the figure, the same configurations as those of the conventional example are denoted by the same reference numerals as those of the conventional example, and the description of the duplicated configurations is omitted. Reference numeral 11 denotes a spiral fin provided on the outer periphery of the electric motor main body 1 so as to rotate about the rotation shaft 4 in the right-hand screw direction at equal pitches.

In the electric motor configured as described above, during operation of the electric motor, a cooling fan (not shown) or the like causes a direction parallel to the center line of the rotating shaft 4 of the electric motor main body 1, that is, in FIG. Not only when the air is blown in the direction of the arrow A1 or A2, but also when the air is blown in the direction perpendicular to the center line of the rotating shaft 4, that is, the direction of the arrow B1 or B2 in FIG. The heat that flows along the fins 11 and is generated in the motor body 1 is taken away, and the overheating of the motor body 1 is suppressed.

Although air is used as the cooling fluid in the above embodiment, the same action and effect can be expected by using other fluids. Further, although the spiral fin is provided so as to turn in the right-handed screw direction in the above-described embodiment, the same action and effect can be expected when the spiral fin is provided so as to turn in the left-handed screw direction.

Embodiment 2 FIG. 3 is a front view showing another embodiment of the present invention, and FIG.
[Fig. 3] is a right side view showing the embodiment. In the figure, the same configurations as those of the conventional example are denoted by the same reference numerals as those of the conventional example, and the description of the duplicated configurations is omitted. Reference numeral 12 denotes a large number of rod-shaped fins provided on the outer periphery of the electric motor body 1 at equal pitches in the direction of the center line of the rotary shaft 4 so as to radially project around the rotary shaft 4 at equal pitches. Is.

In the above embodiment, the electric motor main body 1 is operated by a cooling fan (not shown) during operation of the electric motor.
In the direction parallel to the center line of the rotating shaft 4, that is, the arrow A in FIG.
Not only when air is blown in the 1 or A2 direction, but also when the rotating shaft 4
Direction perpendicular to the center line of the arrow, that is, arrow B1 or B in FIG.
Even when the air is blown in two directions, the wind flows between these rod-shaped fins 12 provided on the outer periphery of the electric motor body 1, the heat generated in the electric motor body 1 is taken away, and the overheating of the electric motor body 1 is suppressed. .

Although air is used as the cooling fluid in the above embodiment, the same action and effect can be expected by using other fluids.

[0016]

As described above, according to the present invention, the spiral fin that swivels around its rotation axis or a large number of rod-shaped fins that protrude in the radial direction around the rotation axis is provided on the outer periphery of the motor body. Therefore, when cooling the electric motor by flowing the fluid around the outer periphery of the electric motor body, even if the fluid is made to flow not only in the direction parallel to the center line of the rotating shaft of the electric motor body but also in the direction vertical, Since it can pass around the rod-shaped fins, the electric motor can be efficiently cooled, and since it is not necessary to prepare electric motors having different fin structures depending on the installation direction of the electric motor and the direction in which the cooling fluid flows, standardization of parts can be performed, Since the process control is simplified, the cost of the electric motor can be reduced.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a right side view showing the same embodiment.

FIG. 3 is a front view showing another embodiment of the present invention.

FIG. 4 is a right side view showing the same embodiment.

FIG. 5 is a front view showing a conventional electric motor.

FIG. 6 is a right side view showing the electric motor.

FIG. 7 is a front view showing another conventional electric motor.

FIG. 8 is a right side view showing the electric motor.

[Explanation of symbols]

 1 electric motor 2 cable 3 power supply 4 rotating shaft 5 fin 11 spiral fin

Claims (2)

[Claims] 1. An electric motor having a heat radiation fin on the outer periphery of an electric motor body, wherein the heat radiation fin is a spiral fin that turns around a rotation axis of the electric motor body. 2. A motor having a heat radiation fin on an outer periphery of the motor body, wherein the heat radiation fin is composed of a large number of rod-shaped fins protruding in a radial direction around a rotation axis of the motor body. Electric motor.