JP2006180669A - Rotor structure also serving to dissipate heat and to prevent intrusion of foreign matter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotor structure which also serves to dissipate heat and to prevent intrusion of a foreign matter. <P>SOLUTION: The rotor structure which also serves to dissipate heat and to prevent intrusion of a foreign matter comprises a boss and a cap provided in the boss wherein the boss has a sealing wall and a boss wall continuous to the sealing wall and at least one pass hole is provided in the sealing wall. The cap has a top wall at one end adjacent to the sealing wall of the boss, and a cap wall continuous to the top wall wherein at least one through hole is made through the top wall. Position of the through hole is shifted from the position of the pass hole of the boss so that fluid flows through the pass hole and the through hole to attain heat dissipation action while preventing a foreign matter from entering the pass hole and the through hole. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a rotor structure having both heat dissipation and foreign matter entry prevention, and more particularly, to a rotor structure having heat dissipation and foreign matter entry prevention.

As shown in FIG. 1, a general known rotor structure is used for a motor, and includes a cap 11 and a boss 12 provided to cover the outer surface of the cap 11, and the cap 11 includes a top wall 111 and the boss 12. A side wall 112 is formed integrally with the top wall 111 and extends downward, and a plurality of through holes 113 are formed in the top wall 111. The boss 12 includes a sealing wall 121 closely adjacent to the top wall 111 of the cap 11, and includes a boss wall 122 integrally formed with the sealing wall 121 closely adjacent to the side wall 112, and the sealing wall 121 is provided with a through-hole 123 at a position corresponding to the through-hole 113 of the top wall 111, so that the through-hole 113 and the through-hole 123 form a coaxial flow path so that fluid can flow. When the motor rotor 13 and the motor stator 14 provided inside the cap 11 and the boss 12 rotate, the heat energy generated along with the rotational energy increases the fluid temperature in the cap 11 and the boss 12, and is coaxial. The fluid whose temperature is increased by the through-hole 113 and the through-hole 123 flows out through the through-hole 113 and the through-hole 123, thereby achieving the effect of dissipating the heat in the cap 11 and the boss 12. 13 and the service life of the motor stator 14 are improved.
The cap 11 is made of a metal material, and the boss 12 is made of a resin material.

However, there is a problem with the above-described implementation method, and the position of the through hole 123 of the boss 12 and the position of the through hole 113 of the cap 11 are coaxial and correspond to each other. 11 It is easy to fall or enter directly into the interior, which in turn affects the internal operation.
Further, the cap 11 is made of a metal material and conducts heat generated by the rotation of the motor rotor 13 and the motor stator 14, but the boss 12 that is in close contact with the cap 11 is made of a resin material. The heat conduction action is far from the heat conduction action produced by the cap 11. Since two different materials are in close contact, and the thermal conductivity of the outer boss 12 is significantly lower than the thermal conductivity of the cap 11, the heat conducted by the cap 11 is influenced by the thermal conductivity of the cap 11. It cannot be dissipated and the heat dissipation effect is greatly discounted.

The main object of the present invention is to prevent the fall and entry of foreign matter and to allow the fluid to enter and exit to achieve the effect of heat dissipation by shifting the through hole of the boss and the through hole of the cap. .
The present invention also provides a space between the sealing wall of the boss and the top wall of the cap to allow fluid to flow, thereby creating natural convection to the cap and assisting in heat dissipation of the cap. One purpose.

The rotor structure having both heat dissipation and foreign matter entry prevention according to the present invention includes at least a boss and a cap provided in the boss. The boss includes a sealing wall and a boss wall continuous with the sealing wall, and at least one through hole is provided in the sealing wall. The cap has a top wall at one end adjacent to the sealing wall of the boss, and includes a cap wall continuous with the top wall. By providing at least one through hole in this top wall and shifting the position of the through hole and the position of the through hole of the boss, fluid can enter and exit the through hole and the through hole, and heat can be dissipated. Foreign matter can be prevented from falling.

  The cap is made of a material with good heat conductivity to conduct the heat generated by the rotation of the motor rotor and motor stator, and in the space formed between the sealing wall of the boss and the top wall of the cap, the fluid is It flows in the space, causes natural convection to the cap, and flows out from the through hole of the boss to assist heat dissipation of the cap. In addition, since the position of the through hole of the boss and the position of the through hole of the cap are shifted from each other, it is possible to prevent foreign matter from directly falling into or entering the cap from the through hole and the through hole. This can improve the overall heat dissipation efficiency by improving the problem of foreign matter falling or entering and affecting the operation of the motor rotor and motor stator, and the motor rotor and motor stator. The service life can be extended.

The rotor structure having both heat dissipation and foreign matter entry prevention provided by the present invention and its functional characteristics will be described with reference to the drawings of the preferred embodiments. As shown in FIGS. 2 and 3, at least a boss 21 and a cap 22 are provided. Among them, the boss 21 includes a sealing wall 211 and a boss wall 212 extending downward and continuing to the sealing wall 211, and at least one through hole 213 is provided in the sealing wall 211. Each wall 212 is provided with a convex portion 214. The cap 22 is formed with a top wall 221 and a cap wall 222 extending downward and continuing to the top wall 221, and at least one through hole 223 is provided in the top wall 221 of the cap 22. At the time of assembly, the cap 22 is assembled in the boss 21, the boss 21 is installed so as to cover the outer surface of the cap 22, and is fixed to the cap 22 by the convex portion 214, and the sealing wall 211 of the boss 21 is directly on the top of the cap 22. Adjacent to the wall 221, the boss wall 212 of the boss 21 is adjacent to the cap wall 222 of the cap 22.

The position of the through hole 213 of the boss 21 and the position of the through hole 223 of the cap 22 are shifted from each other, that is, the through hole 213 and the through hole 223 are not on the same central axis. Only the wall 221 is visible. Further, since the convex portion 214 in the boss 22 is provided between the sealing wall 211 of the boss 21 and the top wall 22 of the cap 22, the space 23 can be formed between the sealing wall 211 and the top wall 221. Further, the boss 21 may be formed of a resin material, and the cap 22 may be formed of a highly heat conductive material such as a metal material. Although not shown in the drawing, the boss 21 is bonded between the boss 21 and the cap 22. Apply the agent.

FIG. 4 shows a sectional view of a preferred embodiment of the present invention applied to a fan motor. In addition, as shown in FIG. 2, the motor rotor 25 of the fan motor is provided on the inner surface of the cap wall 222 of the cap 22, the motor stator 26 is installed on the motor base 27, and the motor stator 26, the motor rotor 25, When the magnetism of the motor stator 26 and the motor rotor 25 is excited, the boss 21 and the cap 22 are driven and rotated to generate fluid movement. The rotation between the motor rotor 25 and the motor stator 26 is converted from magnetic action to heat energy through physical motion, and at this time, the fluid in the boss 21 and the cap 22 is heated. The fluid whose temperature has risen flows due to the rotation of the boss 21 and the cap 22, and further flows out through the through hole 213 of the boss 21 and the through hole 223 of the cap 22, and the thermal energy in the boss 21 and the cap 22 is dissipated. .

  The cap 22 is made of a highly heat-conductive material, and conducts heat generated by the rotation of the motor rotor 25 and the motor stator 26, and between the sealing wall 211 of the boss 21 and the top wall 221 of the cap 22. In the formed space 23, the fluid flows in the space 23, causes natural convection to the cap 22, and flows out from the through hole 213 of the boss 21 to assist heat dissipation of the cap 22. In addition, since the position of the through hole 213 of the boss 21 and the position of the through hole 223 of the cap 22 are shifted from each other, foreign matter may directly fall into or enter the cap 22 from the through hole 213 and the through hole 223. It is possible to prevent problems that affect the operation of the motor rotor 25 and the motor stator 26 due to falling or entering of foreign matter using known techniques, and can effectively improve the overall heat dissipation efficiency. In addition, the service life of the motor rotor 25 and the motor stator 26 can be extended.

It is the cross-sectional schematic which used the well-known rotor structure for the fan motor. 1 is a schematic exploded view of a preferred embodiment of the present invention. 1 is a cross-sectional assembly schematic diagram of a preferred embodiment of the present invention. 1 is a schematic cross-sectional view of a preferred embodiment of the present invention used in a fan motor.

Explanation of symbols

11 Cap 111 Top wall 112 Side wall 113 Through hole 12 Boss 122 Boss wall 123 Through hole 13 Motor rotor 14 Motor stator 21 Boss 211 Sealing wall 212 Boss wall 213 Through hole 214 Convex part 22 Cap 221 Top wall 222 Cap wall 223 Through hole 23 Space 25 Motor rotor 26 Motor stator 27 Motor base

Claims (6)

A rotor structure that combines heat dissipation and foreign matter entry prevention includes at least a boss and a cap provided in the boss, and the boss includes a sealing wall and a boss wall continuous to the sealing wall. Two through holes, a top wall at one end adjacent to the boss sealing wall of the cap, a cap wall continuous to the top wall, and at least one through hole provided in the top wall;
A rotor structure having both heat dissipation and foreign matter entry prevention, wherein the position of the through hole of the boss and the position of the through hole of the cap are shifted.   2. The rotor structure with self-heat dissipation and foreign matter entry prevention according to claim 1, wherein a space is formed between the sealing wall of the boss and the top wall of the cap.   2. The rotor structure according to claim 1, wherein the boss is made of a resin material.   2. The rotor structure according to claim 1, wherein the cap is made of a good heat conductive material.   5. The rotor structure having both heat dissipation and foreign matter entry prevention according to claim 4, wherein the good heat conductive material is a metal material.   2. A rotor structure having both heat dissipation and foreign matter entry prevention according to claim 1, wherein an adhesive is applied between the boss and the cap.

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