Abstract:
A motor has a shaft with a lengthwise through hole in a center, and a guider of a semi-circular shape having plural helical leaves to increase sucking force for gas or liquid, strengthening sucking smoothness. Water current flowing through the water passageway performs heat-dispersing function when the motor operates so as to prolong the service life of the motor. A pressure-dividing ball is placed in front of the guider to divide strong current pressure into several small current pressures to be sucked by the motor to avoid turbulent current and cause idle rotation of the motor to be damaged. Then the motor surely has strong sucking force, smoothness of flowing and its service life effectively prolonged.

Description:
BACKGROUND OF THE INVENTION 
     This invention relates to a motor, particularly to one having increased sucking force and enhancing smoothness of sucking and guiding and its service life. 
     A conventional motor shown in FIG. 1 is used for sucking in gas or liquid, including an outer housing  10  and a bottom cap  11  containing the components of the motor between them. The outer housing  10  has a water outlet  100  extending out from a rear end, and the bottom cap  11  has many small water inlets  111  in the bottom. The motor  1  includes an inner housing  12  and a base  13  for positioning other components between them. A starter  14  is fixed behind the inner housing  12  to transmit power to the motor  1 , which further includes a stator  15  positioned in the inner housing  12  and the base  13  to produce electromagnetic induction, and a rotor  16  positioned in a center hollow of the stator  15  to be rotated by the electromagnetic induction produced by the stator  15 . The rotor  16  has a shaft  161  extending forward from the rotor  16  and passing through the center of the base  13  outward. The shaft  161  has threads  162  formed in a front end. Further, the motor  1  has a guider  17  fixed on the front end of the shaft  161  with a nut  171  engaging the threads  162 . 
     The operating principle of the conventional motor utilizes the starter  14  to transmit electric current to the stator in the inner housing  12  and the base  13  so that the stator may produce electromagnetic induction to rotate the rotor  16  and the shaft  161  and then the guider  17  to produce sucking force for gas or liquid entering the water inlet  111  and guided by the outer housing  10  to flow out of the water outlet  100 . 
     As understood from the aforesaid description, the conventional motor has the following disadvantages. 
     (1) The load for the motor is increased as there is a bent flowing passageway between the outer housing and the motor body when gas or liquid flows through sucked by the guider. 
     (2) High temperature produced by the motor cannot be exhausted out as it is contained in the outer housing, nor carried away by the sucked gas or liquid, shortening the service life of the motor and easily causing the components getting out of order. 
     The water inlet consists of many small holes, which are liable to be clogged in gas or liquid flowing, and the dimensions for sucking is too small to have good effect. 
     SUMMARY OF THE INVENTION 
     The objective of the invention is to offer a motor having a strong sucking force, increasing smoothness of flowing of gas or liquid and prolonging the service life of the motor. 
     The feature of the invention is a rotor having a center lengthwise water passageway and positioned in a stator, so when the stator rotates the rotor, a guider having plural helical leaves in its interior also rotates to produce sucking force for gas or liquid current. And a pressure-dividing ball is additionally placed at a front end of the guider divides strong pressure of gas or liquid current into several small pressures so as to strengthen flowing smoothness of sucked gas or liquid current. And the rotor can carry away heat produced in operating of the motor by means of flowing gas or liquid current through the water passageway in the rotor and the shaft, effectively prolonging the service life of the motor. 
    
    
     BRIEF DESCRIPTION OF DRAWINGS 
     This invention will be better understood by referring to the accompanying drawings, wherein: 
     FIG. 1 is an exploded perspective view of a conventional motor: 
     FIG. 2 is an exploded perspective view of a motor in the present invention: 
     FIG. 3 is a cross-sectional view of the motor in the present invention: 
     FIG. 4 is a cross-sectional view of a rotor and a shaft in the present invention: 
     FIG. 5 is another cross-sectional view of the rotor and the shaft in the present invention: 
     FIG. 6 is one more cross-sectional view of the rotor and the shaft in the present invention: and, 
     FIG. 7 is a perspective view of a check valve in the present invention. 
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     A preferred embodiment of a motor  2  in the present invention, as shown in FIGS. 2 and 3, includes a housing  21 , a bottom cap  22 , a starter  23 , a stator  24 , a rotor  25 , a guiding sucker  26 , a current guider  28 , and a pressure-dividing ball  3  as main components. 
     The housing  21  and the bottom cap  22  are combined together to form a hollow space for containing other components. 
     The starter  23  is fixed on a rear end of the housing  21 , transmitting power to the stator  24  to operate. 
     The stator  24  is positioned in the housing  21 , producing electromagnetic induction when powered by the starter  23 . 
     The rotor  25  is positioned in a center hollow in the stator  24 , rotated by the electromagnetic induction produced by the stator  24 . A shaft  251  is connected to the rotor  25  to extend forward to pass through a center hole of the bottom cap  22  outward, synchronously rotating together with the rotor  25 . In addition, a water passageway  252  is formed through the center of the rotor  25  and the shaft  251  for water to flow through. 
     The guider  26  has a hollow cone shape, connected to the end of the shaft  251 , having plural helical guide leaves  261 , fixed with the end of the shaft  251  with a ring  27  or by means of welding process. Then the guider  26  rotates synchronously with the rotor  25  and the shaft  251 , permitting the guiding leaves  261  rotate and produce sucking force to gas or liquid. 
     The current guide cover  28  is shaped as a half-ball, contacting the outer center of the bottom cap  22 , containing the guider  26  in its interior, producing guiding function in its interior by its half-ball shape, and at the same time expanding sucking dimensions. The pressure-dividing ball  3  has a ball body  31 , and an annular ring  32  fixed around the ball body  31  with four ribs  33  spaced apart and preferably forming a cross to connect the ball body  31  with the ring  32 . But other connecting methods such as welding, screws can be used, and the most preferable method is integration. Then the pressure-dividing ball is positioned to rest on the water inlet of the guider  26 . 
     When the motor in the invention is powered by the starter  23 , the stator  24  produces electromagnetic induction to rotate the rotor  25  and the shaft  251  and the guider  26 , which has the guiding leaves  261  rotating to produce sucking force to suck gas or liquid in to flow toward the water inlet. Then part of the gas or liquid may flow along the curved surface of the current guide cover  28  to move to the water inlet of the guider  26 . Strong gas or liquid sucked in will flow along the spherical surface of the ball body  31  in some small pressure currents, permitting the guider  26  suck gas or liquid smoothly, increasing sucking efficiency of the guider  26 , and also preventing strong gas or liquid pressure from producing turbulent current to let the motor rotate idle, and effectively postponing the service life of the motor. 
     Gas or liquid current then flow through the water passageway  252  of the rotor  25  and the shaft  251 , exchanging heat with the rotor  25  to carry away heat produced by operation of the motor, attaining heat dispersing effect. Then gas or liquid current is exhausted out of the water outlet of the housing  21 . In addition, a second pressure-dividing ball  4  having the same function as the first one may be provided at the water outlet so as to increase exhausting effect of gas or liquid current. 
     In order to augment flowing speed of gas or liquid current, the rotor  25  and the shaft  251  shown in FIGS. 4,  5  and  6 , a helical guiding strip  253  may be provided in the water passageway  252 , rotating synchronously with the rotor  25  and the shaft  251  when they rotate, and assisting gas or liquid current to flow more quickly to the water outlet, enhancing the effect of the motor. 
     If gas or liquid current is wanted to increase to elevate efficiency, the water passageway  252  may be formed to taper from the inlet to the outlet. Or the water passageway  252  may be formed to have the two ends wider than the rest portion, and then sucked-in volume and exhausted-out volume can be augmented to enhance the effect of the motor. 
     Next, the check valve  5  shown in FIG. 7 is located at the water outlet of the water passageway  252  in the rotor  25 , preventing gas or liquid current reversely flow back into the water outlet. The check valve  5  includes a hamper ball  52  hampering the outlet of the water passageway  252 , a position frame  51  rests against the mouth of the water outlet to support the hamper ball  51  always hampering the outlet properly, and a coil spring  53  placed between an upper end of the position frame  51  and an upper end of the hamper ball  52  to control opening and closing of the water outlet. 
     When liquid current flows out of the water passageway  252  to press the coil spring  53  to shrink, the water outlet will be opened, but if the exterior pressure of the water outlet is larger than the pressure of the liquid current in the passageway  252 , the coil spring  53  presses the hamper ball to close up the water outlet to prevent the liquid from reversely flowing into the outlet. 
     As understood from the above description, the motor in the invention has a structure breaking through disadvantages of the conventional motor, having the following advantages. 
     (1) It includes the guider of a cone shape to produce whirlpool-like inward sucking force toward gas or liquid current, and passing through the water passageway in the shaft and rotor with increased sucking and pressure, letting the gas or liquid current produce strong flowing force, increasing doubly the sucking of the motor and exhausting effect. 
     (2) Flowing liquid can flow through swiftly the water passageway, as the water passageway has no bending or winding, surely never producing turbulent current to hamper flowing, in line with the helical leaves in the water passageway, permitting gas or liquid current produce strong flowing force, increasing sucking and exhausting force of the motor. 
     (3) The pressure-dividing ball and the current guide cover placed at the water inlet regulates and expands sucking dimensions, and dividing the strong pressure of gas or liquid current into several small pressure currents, helpful to be sucked in by the guider, increasing smoothness of sucking by the motor, permitting the motor not rotate idle to break, prolonging the service life of the motor. In addition, a second pressure-dividing ball may be placed at the water outlet to increase smoothness of exhausting out of the liquid current. 
     (4) Flowing of gas or liquid current through the passageway formed in the shaft and the rotor enables heat exchange performed between the gas or liquid current and the shaft and the rotor, carrying away the heat produced during operation of the rotor, dispersing the heat, and thus reducing chances of damage of the motor and postpone its service life. 
     While the preferred embodiment of the invention has been described above, it will be recognized and understood that various modifications may be made therein the appended claims are intended to cover all such modifications that may fall within the spirit and scope of the invention.