Vane motor

Abstract

A vane motor including a casing having a pressurized fluid inlet and a pressurized fluid outlet through which a pressurized fluid is introduced and discharged and a rotor disposed inside the casing and configured to receive the pressure of the pressurized fluid and rotate about a rotary shaft held in the casing, the rotor having a generally cylindrical rotor body with a central axis corresponding to the rotary shaft and vanes installed in vane guide grooves formed in the side surface of the rotor body and changed in widths protruding from the vane guide grooves according to rotation phases, wherein the vanes are arch-shaped in a longitudinal direction of the rotary shaft, the vane guide grooves are arch-shaped to accommodate the vanes thereinto, and the vanes are rotatably coupled to portions of the rotor body through link rods disposed on one side of the vanes. The vane motor is configured to allow the arch-shaped vanes to perform the rotating motions along the arch traces, not the linear reciprocating motions, thereby suppressing and removing the abnormal operations, abrasion, and friction of the vanes.

1 . A vane motor comprising:
 a casing having a pressurized fluid inlet and a pressurized fluid outlet through which a pressurized fluid is introduced and discharged; and   a rotor disposed inside the casing and configured to receive the pressure of the pressurized fluid and rotate about a rotary shaft held in the casing,   the rotor having a generally cylindrical rotor body with a central axis corresponding to the rotary shaft and vanes installed in vane guide grooves formed in the side surface of the rotor body and changed in widths protruding from the vane guide grooves according to rotation phases,   wherein the vanes are arch-shaped viewed in a longitudinal direction of the rotary shaft, the vane guide grooves are arch-shaped to accommodate the vanes thereinto, and the vanes are rotatably coupled to portions of the rotor body through link rods disposed on one side of the vanes.   
     
     
         2 . The vane motor according to  claim 1 , wherein the rear portions of the inlets of the vane guide groove accommodating the vanes with respect to the rotating direction of the rotor, when viewed in the longitudinal direction (on the side) of the rotary shaft, are locally removed to provide expanding portions through which the rear portions of the vanes are exposed more, and the expanding portions prevent the lower end portions of the vanes from being exposed when the vanes move to the outside to the maximum. 
     
     
         3 . The vane motor according to  claim 1 , wherein the casing comprises a cylindrical casing body and closure plates for closing both longitudinal ends of the casing body, and the pressurized fluid inlet is formed on the side surface of the cylindrical casing body. 
     
     
         4 . The vane motor according to  claim 1 , wherein the casing comprises a cylindrical casing body and closure plates for closing both longitudinal ends of the casing body, and the pressurized fluid inlet is formed on the closure plates. 
     
     
         5 . The vane motor according to  claim 1 , wherein each vane has a pressure increasing groove formed concavely in a portion of a thickness thereof on upper part of the rear portion thereof. 
     
     
         6 . The vane motor according to  claim 5 , wherein a portion of the pressure increasing groove is formed concavely toward the rotary shaft of the rotor or has an acute-angled projection formed on the lower side inlet of the pressure increasing groove when viewed in the longitudinal direction (on the side) of the rotary shaft. 
     
     
         7 . The vane motor according to  claim 4 , further comprising a cylindrical inner container disposed inside the casing to accommodate the rotor therein and adapted to allow the ends of the vanes to come into contact with the inner peripheral wall thereof, while retaining the pressurized fluid therein until the pressurized fluid introduced from the pressurized fluid inlet of the casing is discharged through the pressurized fluid outlet of the casing, so that the inner container rotates together with the rotor rotating, while having the revolutions per minute different from the revolutions per minute of the rotor, and the pressurized fluid inlet introduces the pressurized fluid to spaces defined by surrounding the inner container, the rotor body, and the rear portions of the vanes when the pressurized fluid inlet is overlaid on the defined spaces or meets the defined spaces according to the rotation of the rotor. 
     
     
         8 . The vane motor according to  claim 7 , wherein the rear portions of the inlets of the vane guide groove accommodating the vanes with respect to the rotating direction of the rotor, when viewed in the longitudinal direction (on the side) of the rotary shaft, are locally removed to provide expanding portions through which the rear portions of the vanes are exposed more, and the pressurized fluid inlet comprises a single hole or a plurality of holes overlaid on some sections of a trace along which the expansion portions move. 
     
     
         9 . The vane motor according to  claim 8 , wherein the expanding portions comprise primary expanding portions formed by removing the rotor body over the entire portion of the longitudinal direction of the rotor and secondary expanding portions formed by additionally removing the rotor body on both longitudinal ends of the rotor of the primary expanding portions to provide concave surfaces to the closure plates and the rear portions of the vanes. 
     
     
         10 . The vane motor according to  claim 7 , wherein the rotation central axis of the inner container and the rotary shaft of the rotor are kept in given positions inside the casing, and when a cylinder constituting the inner container rotates inside the casing, bearings are provided to decrease the friction between the outer peripheral wall of the cylinder and the inner peripheral wall of the casing. 
     
     
         11 . The vane motor according to  claim 1 , wherein the pressurized fluid inlet comprises a plurality of holes arranged, a plurality of pressurized fluid paths connected correspondingly to the plurality of holes, and a plurality of opening and closing means mounted correspondingly on the plurality of pressurized fluid paths to perform step-by-step (multistage) adjustment in an output or torque thereof.