Pneumatic tool motor rotor with thrust augmentation effect

Abstract

A pneumatic tool motor rotor with thrust augmentation effect has a rotor body in the shape of a three-dimensional cylinder having a circular wall and two end faces, and the circular wall is circularly arranged with multiple concave grooves with preset intervals. Motive blades are configured on the concave grooves, flexible on the radial direction. A power outputting shaft protrudes from the rotor body. Augmenting concave parts are formed nearby the concave grooves on the circular wall of the rotor body and include a wind guiding surface and a pushed augmenting surface, with the facing direction of the pushed augmenting surface being the same as or close to that of the motive blades. Between the pushed augmenting surface and the nearby concave groove, a separating rib is formed, and the wind guiding surface extends outside from the inner end of the pushed augmenting surface and connects with the circular wall.

1 . A pneumatic tool motor rotor with thrust augmentation effect comprising:
 a rotor body, in the shape of a three-dimensional cylinder having a circular wall and two end faces, and the circular wall is circularly arranged with multiple concave grooves with preset intervals;   multiple motive blades, configured on the concave grooves formed on the circular wall of the rotor body, flexible on the radial direction;   a power outputting shaft, protruding from one end face of the rotor body; multiple augmenting concave parts, concavely formed nearby the concave grooves on the circular wall of the rotor body, wherein, said augmenting concave parts include a wind guiding surface and a pushed augmenting surface, with the facing direction of the pushed augmenting surface being the same as or close to that of the motive blades, moreover, between the pushed augmenting surface and the nearby concave groove, a separating rib is formed, and the wind guiding surface extends outside from the inner end of the pushed augmenting surface and connect with the circular wall;   thus, when the motor rotor in the pneumatic tool is pushed by air pressure, the pressure receiving area can be enlarged through the pushed augmenting surface of the augmenting concave parts, so as to enhance the rotational torque of the motor rotor.   
     
     
         2 . The structure defined in  claim 1 , wherein, between the neighboring concave grooves, two augmenting concave parts are formed with opposite pushed directions, wherein the slanting directions of the wind guiding surfaces of the two augmenting concave parts are opposite of each other, and the pushed augmenting surfaces of the two augmenting concave parts are adjacent to different concave grooves; based on this, in the cases of both normal or reverse rotation of the motor rotor, augmentation can be accomplished through the augmenting concave parts. 
     
     
         3 . The structure defined in  claim 2 , wherein the part between the augmenting concave parts and the two end faces of the rotor body is arranged as local sections with some spacing. 
     
     
         4 . The structure defined in  claim 2 , wherein the augmenting concave parts are arranged as a full section with its two ends going through the rotor body to the two end faces. 
     
     
         5 . The structure defined in  claim 3 , wherein the inside of the rotor body is in a solid style. 
     
     
         6 . The structure defined in  claim 3 , wherein the inside of the rotor body has a hollow chamber, said hollow chamber is arranged to hold a hammering component, so as to form a rotor body with built-in hammering function.