Axial flow cylinder of pneumatic tool

Abstract

An axial flow cylinder of pneumatic tool, including: a cylinder body formed with an internal cylinder chamber; a rotary shaft rotatably disposed in the cylinder chamber along an axis of the cylinder body; and a predetermined number of movable wheels and fixed wheels mounted in the cylinder chamber. Multiple oblique first vents are annularly formed on each movable wheel at equal intervals. Multiple oblique second vents are annularly formed on each fixed wheel at equal intervals. The first and second vents are inclined in reverse directions. The movable wheels and the fixed wheels are interlaced with each other. The fixed wheels are fixedly disposed in the cylinder chamber without possibility of rotation. The movable wheels are synchronously rotatable with the rotary shaft. After high-pressure air flows from the intake into the cylinder chamber, the movable wheels and rotary shaft are driven and rotated by the high-pressure air. The air flows along the axis of the cylinder body between the vents of the movable wheels and fixed wheels and then is exhausted from the exhaust ports. In operation, the vents of the cooperative movable wheels and fixed wheels compress the air.

1 . An axial flow cylinder of pneumatic tool, comprising: 
 a cylinder body formed with an internal cylinder chamber; a front end of the cylinder body being formed with at least one intake; a cavity being formed at the front end of the cylinder body between the cylinder chamber and the intake, the intake, the cavity and the cylinder chamber communicating with each other; multiple oblique air-conducting holes being annularly disposed in the cavity at equal intervals; a predetermined number of exhaust ports being formed at a rear end of the cylinder body and communicating with the cylinder chamber;    a rotary shaft rotatably disposed in the cylinder chamber along an axis of the cylinder body;    a predetermined number of movable wheels mounted on the rotary shaft at equal intervals and synchronously rotatable with the rotary shaft; multiple first vents being annularly formed on each movable wheel at equal intervals, an axis of each first vent and an axis of the movable wheel containing a predetermined angle; a first movable wheels being positioned behind the air-conducting holes; the air-conducting holes corresponding to the first vents, the air-conducting holes being inclined in a direction reverse to the direction in which the first vents being inclined; and    multiple fixed wheels the number of which is equal to the number of the movable wheels, multiple second vents being annularly formed on each fixed wheel at equal intervals, an axis of each second vent and an axis of the fixed wheel containing a predetermined angle, the fixed wheels being fixedly disposed in the cylinder chamber without possibility of rotation, the fixed wheels and the movable wheels being interlaced with each other, the second vents being inclined in a direction reverse to a direction in which the first vents are inclined; whereby after high-pressure air flows from the intake into the cylinder chamber, the movable wheels and rotary shaft are driven and rotated by the high-pressure air, the air flowing along the axis of the cylinder body between the vents of the movable wheels and fixed wheels and then being exhausted from the exhaust ports.    
   
   
       2 . The axial flow cylinder as claimed in  claim 1 , wherein the movable wheels and fixed wheels are ring-shaped bodies, the first vents passing through the movable wheel from a front end face to a rear end face thereof; the second vents passing through the fixed wheel from a front end face to a rear end face thereof.  
   
   
       3 . The axial flow cylinder as claimed in  claim 2 , wherein an axial key is formed on the circumference of the rotary shaft; an inner circumference of each movable wheel being formed with a key notch in which the key of the rotary shaft is inserted; the cylinder further comprising a predetermined number of inner spacing plates fitted on the rotary shaft interlaced with the movable wheels, the movable wheels and the inner spacing plates being leant on each other, whereby the movable wheels are kept at equal intervals; the fixed wheel having an inner diameter larger than an outer diameter of the inner spacing plate.  
   
   
       4 . The axial flow cylinder as claimed in  claim 3 , further comprising a predetermined number of outer spacing plates disposed on a wall of the cylinder chamber; outer circumferences of the fixed wheels being located by the outer spacing plates and kept at equal intervals.  
   
   
       5 . The axial flow cylinder as claimed in  claim 1 , wherein the movable wheels and the fixed wheels are annular plate bodies, an end face of each movable wheel being formed with multiple openings annularly arranged at equal intervals, an oblique vane rearward extending from one side of each opening, each two adjacent vanes defining a said first vent; an end face of each fixed wheel being formed with multiple openings arranged at equal intervals, an oblique vane rearward extending from one side of each opening, each two adjacent vanes define a said second vent.  
   
   
       6 . The axial flow cylinder as claimed in  claim 5 , further comprising multiple inner spacing plates the number of which is equal to the number of the movable wheels, each inner spacing plate being an annular body, the inner spacing plates being fitted on the rotary shaft along the axis of the rotary shaft at equal intervals and synchronously rotatable with the rotary shaft; the inner circumference of the movable wheel being fixedly connected with the inner spacing plate.  
   
   
       7 . The axial flow cylinder as claimed in  claim 6 , further comprising a predetermined number of outer spacing plates disposed on a wall of the cylinder chamber; the outer circumferences of the fixed wheels being fixed by the outer spacing plates.  
   
   
       8 . The axial flow cylinder as claimed in  claim 1 , further comprising an air-conducting member disposed in the cavity; the air-conducting holes being formed through the air-conducting member from a front end face to a rear end face thereof.  
   
   
       9 . The axial flow cylinder as claimed in  claim 1 , wherein multiple vanes are disposed in the cavity at equal intervals, each two adjacent vanes defining one of the air-conducting holes.  
   
   
       10 . The axial flow cylinder as claimed in  claim 1 , wherein the first vent has a length equal to a length of the second vent.  
   
   
       11 . The axial flow cylinder as claimed in  claim 1 , wherein the vents are oblique straight vents.  
   
   
       12 . The axial flow cylinder as claimed in  claim 1 , wherein the vents are oblique arched vents.  
   
   
       13 . The axial flow cylinder as claimed in  claim 1 , further comprising a flow way formed at the front end of the cylinder body to communicate with the intake and the cavity.  
   
   
       14 . The axial flow cylinder as claimed in  claim 1 , wherein two bearings are respectively disposed at the front and rear ends of the cylinder body, the rotary shaft being fitted in the bearings.