Multistage pneumatic motor

Abstract

A multistage pneumatic motor includes a shell ( 1 ) and a power output main shaft ( 2 ). The shell ( 1 ) is provided with a gas inlet ( 3 ) and a gas outlet ( 4 ). Two or more pneumatic motor stages ( 11, 12, 13 ) are installed in the shell ( 1 ). The first pneumatic motor stage is communicated with the gas inlet ( 3 ), and the last pneumatic motor stage is communicated with the gas outlet ( 4 ). Compressed gas enters the shell ( 1 ) through the gas inlet ( 3 ), drives the first pneumatic motor stage, then drives the next pneumatic motor stage, and is exhausted from the shell ( 1 ) through the gas outlet ( 4 ) at last. Every pneumatic motor stage is provided with a power output shaft ( 112, 122, 132 ) which is connected to the power output main shaft ( 2 ), so that the powers produced by all pneumatic motor stages ( 11, 12, 13 ) are jointed together and then output by the power output main shaft ( 2 ). The multistage pneumatic motor improves working efficiency greatly, saves energy source and reduces noise.

1 . A multistage pneumatic motor, comprising a shell and a power output main shaft, and the shell being provided with a gas inlet and a gas outlet, characterized in that, two or more pneumatic motor stages are installed in the shell, the first pneumatic motor stage among the two or more pneumatic motor stages is communicated with the gas inlet, and the last pneumatic motor stage is communicated with the gas outlet, a power gas enters the shell through the gas inlet, drives the first pneumatic motor stage and then the second pneumatic motor stage, then drives the next pneumatic motor stage, and is exhausted from the shell through the gas outlet at last, every pneumatic motor stage is provided with a power output shaft which is connected to the power output main shaft, so that the powers produced by all the pneumatic motor stages are jointed together and then output by the power output main shaft. 
     
     
         2 . The multistage pneumatic motor according to  claim 1 , characterized in that, the rotating speeds delivered from the power output shafts of each stage of the pneumatic motor to the power output main shaft are the same, so that the powers produced by each stage of the pneumatic motor are joined forwardly and then outputted by the power output main shaft. 
     
     
         3 . The multistage pneumatic motor according to  claim 2 , characterized in that, the pneumatic motor is a gear motor, a vane motor, a plunger motor or a screw motor. 
     
     
         4 . The multistage pneumatic motor according to  claim 3 , characterized in that, when the pneumatic motor is a gear motor, the shell is provided therein with a first pneumatic motor stage consisting of a pair of a first-stage motor gear and a second pneumatic motor stage consisting of a pair of a second-stage motor gear, one gear shaft of the first-stage motor gears is the power output shaft of the first pneumatic motor stage, one gear shaft of the second-stage motor gears is the power output shaft of the second pneumatic motor stage, the power output shaft of the first pneumatic motor stage, the power output shaft of the second pneumatic motor stage and the power output main shaft are the same shaft, the first-stage motor gear and the second-stage motor gear have the same number of teeth and the same modulus, and the first-stage motor gear is shorter than the second-stage motor gear, so that the rotating speed of the power output shaft of the first pneumatic motor stage is the same with the rotating speed of the power output shaft of the second pneumatic motor stage. 
     
     
         5 . The multistage pneumatic motor according to  claim 3 , characterized in that, when the pneumatic motor is a gear motor, the shell is provided therein with a first pneumatic motor stage consisting of a pair of a first-stage motor gear, a second pneumatic motor stage consisting of a pair of a second-stage motor gear and a third pneumatic motor stage consisting of a pair of a third-stage motor gear, and the power output shafts of the first pneumatic motor stage, the second pneumatic motor stage and the third pneumatic motor stage are connected with the power output main shaft through a transmission gear. 
     
     
         6 . The multistage pneumatic motor according to  claim 5 , characterized in that, the first pneumatic motor stage, the second pneumatic motor stage and the third pneumatic motor stage surround the power output main shaft and are arranged in a circular shape, the power output main shaft is located at the centre of the respective pneumatic motor stages, one gear shaft of each pair of motor gear stages is the power output shaft of each pneumatic motor stage, and the transmission gear comprises a driving gear provided on the power output shaft of each pneumatic motor stage and a driven gear provided on the power output main shaft while engaging with the driving gear of each pneumatic motor stage. 
     
     
         7 . The multistage pneumatic motor according to  claim 6 , characterized in that, the driving gear provided on the power output shaft of each pneumatic motor stage is a gear formed on the power output shaft, so that the power output shaft of each pneumatic motor stage becomes a driving gear shaft, and the driving gears on the driving gear shafts of respective pneumatic motor stages have the same the modulus and the same number of teeth. 
     
     
         8 . The multistage pneumatic motor according to  claim 5 , characterized in that, the first pneumatic motor stage, the second pneumatic motor stage and the third pneumatic motor stage are arranged in a linear shape, one gear shaft of each pair of motor gear stages is the power output shaft of each pneumatic motor stage, the transmission gear comprises three first-stage driving gears provided on the power output shaft of each pneumatic motor stage, two first-stage driven gears simultaneously engaging with the first-stage driving gears of the adjacent pneumatic motor stages, two second-stage driving gear shafts being respectively coaxial with the two first-stage driven gears, and one second-stage driven gear simultaneously engaging with the two second-stage driving gear shafts, and the one second-stage driven gear is provided on the power output main shaft. 
     
     
         9 . The multistage pneumatic motor according to  claim 8 , characterized in that, the three first-stage driving gears have the same modulus and the same number of teeth, the two first-stage driven gears have the same modulus and the same number of teeth, and the two second-stage driving gear shafts have the same modulus and the same number of teeth. 
     
     
         10 . The multistage pneumatic motor according to  claim 7 , characterized in that, the first-stage motor gear, the second-stage motor gear and the third-stage motor gear have the same number of teeth and the same gear length, and the modulus of the gears increase stage by stage so that the rotating speeds of the power output shafts of the respective pneumatic motor stages are the same. 
     
     
         11 . The multistage pneumatic motor according to  claim 7 , characterized in that, the first-stage motor gear, the second-stage motor gear and the third-stage motor gear have the same number of teeth and the same modulus, and the lengths of the gears increase stage by stage so that the rotating speeds of the power output shafts of the respective pneumatic motor stages are the same. 
     
     
         12 . The multistage pneumatic motor according to  claim 7 , characterized in that, the first-stage motor gear, the second-stage motor gear and the third-stage motor gear have the same modulus and the same gear length, and the numbers of the teeth of the gears increase stage by stage so that the rotating speeds of the power output shafts of the respective pneumatic motor stages are the same. 
     
     
         13 . The multistage pneumatic motor according to  claim 5 , characterized in that, the first pneumatic motor stage, the second pneumatic motor stage and the third pneumatic motor stage surround the power output main shaft and are arranged in a circular shape, the power output main shaft is located at the centre of the respective pneumatic motor stages, one gear shaft of each pair of motor gear stages is the power output shaft of each pneumatic motor stage, the transmission gear comprises respective transmission gears of the respective motor gear stages with different reduction ratios and a driven gear provided at the power output main shaft, and the rotating speeds delivered from the respective pneumatic motor stages to the power output main shaft are the same. 
     
     
         14 . The multistage pneumatic motor according to  claim 9 , characterized in that, the first-stage motor gear, the second-stage motor gear and the third-stage motor gear have the same number of teeth and the same gear length, and the modulus of the gears increase stage by stage so that the rotating speeds of the power output shafts of the respective pneumatic motor stages are the same. 
     
     
         15 . The multistage pneumatic motor according to  claim 9 , characterized in that, the first-stage motor gear, the second-stage motor gear and the third-stage motor gear have the same number of teeth and the same modulus, and the lengths of the gears increase stage by stage so that the rotating speeds of the power output shafts of the respective pneumatic motor stages are the same. 
     
     
         16 . The multistage pneumatic motor according to  claim 9 , characterized in that, the first-stage motor gear, the second-stage motor gear and the third-stage motor gear have the same modulus and the same gear length, and the numbers of the teeth of the gears increase stage by stage so that the rotating speeds of the power output shafts of the respective pneumatic motor stages are the same.