Scavenging pump

Abstract

A scavenging pump is utilized to draw oils from a catch tank that collects the oils supplied to components to an oil pan that reserves therein the oils. The scavenging pump includes gears to draw the oils, and a housing that stores therein the gears. An oil receiving portion capable of receiving the oils injected from the exterior is formed in an outer circumferential surface of the housing, and an oil introducing hole that introduces the oils injected to the oil receiving portion into the interior is opened at a position continuous from a lower part of the oil receiving portion and facing the gears.

1 . A scavenging pump utilized to draw oils from a catch tank that collects the oils supplied to a component to an oil pan that reserves therein the oils, and comprising:
 gears to draw the oils; and   a housing that stores therein the gears,   wherein an oil receiving portion capable of receiving the oils injected from an exterior is formed in an outer circumferential surface of the housing, and an oil introducing hole that introduces the oils injected to the oil receiving portion into an interior is opened at a position continuous from a lower part of the oil receiving portion and facing the gears.   
     
     
         2 . The scavenging pump according to  claim 1 , wherein a guide portion that guides the oils to the oil introducing hole is formed along an edge of the oil introducing hole at an outer-circumferential-surface side thereof. 
     
     
         3 . The scavenging pump according to  claim 1 , wherein an area of the oil receiving portion is larger than an area of the oil introducing hole. 
     
     
         4 . The scavenging pump according to  claim 2 , wherein the housing comprises an oil retaining portion which is capable of retaining the oils together with the guide portion at a circumferential edge of the oil introducing hole. 
     
     
         5 . The scavenging pump according to  claim 1 , wherein the oil introducing hole increases a diameter from an outer circumferential surface to an inner circumferential surface. 
     
     
         6 . The scavenging pump according to  claim 1 , wherein the oil receiving portion gradually reduces a width toward the oil introducing hole. 
     
     
         7 . The scavenging pump according to  claim 1 , wherein:
 a guide portion that guides the oils to the oil introducing hole is formed along an edge of the oil introducing hole at an outer-circumferential-surface side thereof; and   an area of the oil receiving portion is larger than an area of the oil introducing hole.   
     
     
         8 . The scavenging pump according to  claim 1 , wherein:
 a guide portion that guides the oils to the oil introducing hole is formed along an edge of the oil introducing hole at an outer-circumferential-surface side thereof; and   the oil introducing hole increases a diameter from an outer circumferential surface to an inner circumferential surface.   
     
     
         9 . The scavenging pump according to  claim 1 , wherein:
 an area of the oil receiving portion is larger than an area of the oil introducing hole; and   the oil introducing hole increases a diameter from an outer circumferential surface to an inner circumferential surface.   
     
     
         10 . The scavenging pump according to  claim 1 , wherein:
 the housing comprises an oil retaining portion which is capable of retaining the oils together with the guide portion at a circumferential edge of the oil introducing hole; and   the oil introducing hole increases a diameter from an outer circumferential surface to an inner circumferential surface.   
     
     
         11 . The scavenging pump according to  claim 1 , wherein:
 a guide portion that guides the oils to the oil introducing hole is formed along an edge of the oil introducing hole at an outer-circumferential-surface side thereof; and   the oil receiving portion gradually reduces a width toward the oil introducing hole.   
     
     
         12 . The scavenging pump according to  claim 1 , wherein:
 an area of the oil receiving portion is larger than an area of the oil introducing hole; and   the oil receiving portion gradually reduces a width toward the oil introducing hole.   
     
     
         13 . The scavenging pump according to  claim 1 , wherein:
 the housing comprises an oil retaining portion which is capable of retaining the oils together with the guide portion at a circumferential edge of the oil introducing hole; and   the oil receiving portion gradually reduces a width toward the oil introducing hole.   
     
     
         14 . The scavenging pump according to  claim 1 , wherein:
 the oil introducing hole increases a diameter from an outer circumferential surface to an inner circumferential surface; and   the oil receiving portion gradually reduces a width toward the oil introducing hole.