Patent Publication Number: US-2005134130-A1

Title: Motor with wavelike casing

Description:
FIELD OF THE INVENTION  
      The present invention relates to motors, and particularly to a motor with a wavelike casing for guiding airflow so that by the texture of the casing, the wind flows along guide directions so as to have preferred heat dissipating effect, dust proof effect and water proof effect.  
     BACKGROUND OF THE INVENTION  
      With reference to  FIG. 1 , in the prior art motor  1 , no water proof design at a portion for guiding the electric wire  12  into a power hole  11 . Thereby in the prior art, the coil and rotor are integrally formed. As the motor is destroyed, the whole motor is deserted. Thereby the use of the prior art motor is inconvenient, but also it induces the problem of environmental pollution.  
     SUMMARY OF THE INVENTION  
      Accordingly, the primary object of the present invention is to provide a motor comprises a casing having a plurality of slots; an interior of the casing having a coil which is formed by winding enamel-insulated wires; an inner cover; an outer cover locked to the casing and the inner cover; and a rotor placed within the casing and fixed to be between the outer cover and the casing by a bearing; an inner diameter of the casing being matched to the diameter of the rotor; a very small gap being formed between the rotor and the casing so that the rotor is rotatable therein. An outer side of the casing has wavelike textures. External air is guided into the wave like textures so by the texture of the casing. Air flows along the texture so as to have predetermined heat dissipating effect, dust proof effect and water proof effect.  
      The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       FIG. 1  is a perspective view of a prior art motor.  
       FIG. 2  is an exploded perspective view of the present invention.  
       FIG. 3  is an enlarged view of the waterproof pads of the present invention.  
       FIG. 4  is a schematic view showing the airflow according to the present invention.  
       FIG. 5  is an assembled perspective view of the present invention. 
    
    
     DETAILED DESCRIPTION OF THE INVENTION  
      In order that those skilled in the art can further understand the present invention, a description will be described in the following in details. However, these descriptions and the appended drawings are only used to cause those skilled in the art to understand the objects, features, and characteristics of the present invention, but not to be used to confine the scope and spirit of the present invention defined in the appended claims.  
      With reference to  FIG. 2 , the motor  2  of the present invention has the following structure.  
      A casing  21  has a plurality of slots. An interior of the casing  21  has a coil  32  which is formed by winding enamel-insulated wires.  
      An inner cover  23  is includes.  
      An outer cover  22  is includes. A plurality of screws  221  pass through the through holes  231  of the inner cover  23 , the through holes  21  of the casing  21  and the screw holes  222  of the outer cover  22  so as to lock the outer cover  22 , the casing  21  and the inner cover  23 .  
      A rotor  30  is placed within the casing  21  and is fixed to be between the outer cover  23  and the casing  21  by a bearing  31 . An inner diameter of the casing  21  is matched to the diameter of the rotor  30 . A very small gap is formed between the rotor  30  and the casing  21  so that the rotor  30  can rotate therein.  
      An O ring  24  is installed between the casing  21 , the inner cover  23  and the outer cover  22  for tightly adhering the casing  21 , inner cover  23  and the outer cover  22 . Not only the object of waterproof is achieved, but also the noise is isolated.  
      Two water-proof pads  25 ,  26  are installed at a notch  210  at an upper edge of the casing, see  FIG. 3 . The waterproof pads  25 ,  26  are combinable. An electrical wire  251  is tightly enclosed in a recess formed by the two waterproof pads  25 ,  26  so as to achieve the object of waterproof.  
      A spindle  301  of the rotor  30  passes through the inner cover  23  through the bearing  31  to be combined with a via hole  271  of a fan  27 . A screw  291  passes through the washer  292  and then is locked to the screw hole  303  of the spindle  301 . Two lateral sides  302  of the spindle  301  are exactly combined to the wall of the via hole  271  of the fan  27 . Thereby the operation of the motor will drive the fan  27  to rotate. A fan cover  28  is installed on one outer side of the casing  21  opposite to the outer cover  22 . The fan cover  28  is locked to the casing  21  by locking screws  29  to the screw holes  230  of the inner cover  23 . Thereby the rotation of the fan  27  will be protected.  
      With reference to  FIGS. 4 and 5 , when the fan  27  of the present invention is assembled into a rotor  30 , external air will be guided into a wave like shape casing  21  so that wind flows as the indication. Thereby by the texture of the casing  21 , the wind flows along guide directions so as to have preferred heat dissipating effect, dust proof effect and waterproof effect.  
      The present invention is thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the present invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.