Improved design of integrated electro-hydraulic power unit

Abstract

An electro-hydraulic power unit with an improved hydraulic fluid flow through the unit. The unit accomplishes the improved fluid flow by having an inlet port in a housing that is fluidly connected to an electric motor that has a rotor with vanes cast thereon and at least one opening within the rotor. A hydraulic pump inlet is fluidly connected to the electric motor such that the vanes of the electric motor will supply hydraulic fluid to the hydraulic pump inlet.

1 . An electro-hydraulic power unit comprising: 
 a housing;    an inlet port within the housing;    an electric motor within the housing that is fluidly connected to the inlet port and the motor having at least one opening therein;    vanes operatively connected to the electric motor; and    a hydraulic pump fluidly connected to the electric motor.    
   
   
       2 . The electro-hydraulic power unit of  claim 1  wherein the electric motor is an integrated AC electrical motor.  
   
   
       3 . The electro-hydraulic power unit of  claim 1  wherein the hydraulic pump is a checkball hydraulic pump.  
   
   
       4 . The electro-hydraulic power unit of  claim 1  wherein hydraulic pump is a rotary cam hydraulic power unit.  
   
   
       5 . The electro-hydraulic power unit of  claim 1  wherein the opening within the rotor is semi-circular.  
   
   
       6 . The electro-hydraulic power unit of  claim 1  wherein the rotor of the electric motor is fluidly connected to the hydraulic pump at a hydraulic pump inlet.  
   
   
       7 . The electro-hydraulic power unit of  claim 1  wherein the hydraulic pump that increases fluid pressure through centrifugal rotation.  
   
   
       8 . The electro-hydraulic power unit of  claim 1  wherein the hydraulic pump has a wobble plate.  
   
   
       9 . The electro-hydraulic power unit of  claim 8  wherein the opening within the rotor balances the rotor and the wobble plate.  
   
   
       10 . An electro-hydraulic power unit comprising: 
 a housing;    an inlet port within the housing;    an electric motor within the housing and fluidly connected to the inlet port;    said electric motor having a rotor with at least one opening therein; and    a hydraulic pump having an inlet port fluidly connected to the electric motor.    
   
   
       11 . The electro-hydraulic power unit of  claim 10  wherein the rotor supplies oil to the inlet port of the hydraulic pump.  
   
   
       12 . The electro-hydraulic power unit of  claim 10  wherein the electric motor is an integrated AC electrical motor.  
   
   
       13 . The electro-hydraulic power unit of  claim 10  wherein the hydraulic pump is a checkball hydraulic pump.  
   
   
       14 . The electro-hydraulic power unit of  claim 10  wherein hydraulic pump is a rotary cam hydraulic power unit.  
   
   
       15 . The electro-hydraulic power unit of  claim 10  wherein the opening within the rotor is in a non-symmetric pattern.  
   
   
       16 . The electro-hydraulic power unit of  claim 10  wherein the hydraulic pump is a piston pump  
   
   
       17 . The electro-hydraulic power unit of  claim 10  wherein the hydraulic pump has a wobble plate.  
   
   
       18 . The electro-hydraulic power unit of  claim 17  wherein the openings within the rotor balance, the rotor, and the wobble plate.  
   
   
       19 . The electro-hydraulic power unit of  claim 10  wherein a centrifugal pump is provided to increase fluid pressure through centrifugal rotation.  
   
   
       20 . The electro-hydraulic power unit of  claim 18  wherein the electric motor is an internal permanent magnet motor.