Oil pump

Abstract

An oil pump that sucks and discharges oil, includes: a housing portion; a stator portion including an outer ring that is accommodated inside the housing portion, and a main pressing end that is formed to protrude outward from an outer circumferential surface of the outer ring; a rotor portion accommodated inside the outer ring, and sucking and discharging oil through rotation; a spring portion including a main spring that presses the stator portion; a guiding portion including a first guiding member that is installed on the outer circumferential surface of the outer ring; and a sealing portion interposed between the housing portion and a stator portion to prevent the oil flowing into the variable chamber from leaking into another space between the housing portion and the stator portion.

1 . An oil pump that sucks and discharges oil, comprising:
 a housing portion;   a stator portion including an outer ring that is accommodated inside the housing portion and forms a variable chamber into which oil flows between the housing portion and the stator portion, and a main pressing end that is formed to protrude outward from an outer circumferential surface of the outer ring;   a rotor portion accommodated inside the outer ring, and sucking and discharging oil through rotation;   a spring portion including a main spring that presses the stator portion, and movably supporting the outer ring inside the housing portion;   a guiding portion including a first guiding member that is installed on the outer circumferential surface of the outer ring, slidably installed in a first guiding groove formed in an inner wall of the housing portion, and guides a movement of the outer ring as the outer ring is pressed by the oil flowing into the variable chamber, and guiding the movement of the outer ring; and   a sealing portion interposed between the housing portion and a stator portion to prevent the oil flowing into the variable chamber from leaking into another space between the housing portion and the stator portion.   
     
     
         2 . The oil pump according to  claim 1 ,
 wherein the first guiding groove is formed on a side opposite to the variable chamber on the basis of the outer ring, and the first guiding member is installed on the outer circumferential surface of the outer ring on a side opposite to the variable chamber, and   wherein the spring portion further includes a first auxiliary spring having one end that is in contact with the outer circumferential surface of the outer ring on a side opposite to the main spring and the other end that is in contact with the inner wall of the housing portion.   
     
     
         3 . The oil pump according to  claim 2 ,
 wherein the stator portion further includes a first auxiliary pressing end that is formed to protrude from the outer circumferential surface of the outer ring to surround the first auxiliary spring, and   wherein the sealing portion includes a first sealing member interposed between the inner wall of the outer ring and the first auxiliary spring.   
     
     
         4 . The oil pump according to  claim 2 ,
 wherein the spring portion further includes a second auxiliary spring having one end that is in contact with the main pressing end and the other end that is in contact with the inner wall of the housing portion, and   wherein the stator portion further includes a second auxiliary pressing end that is formed to protrude from the main pressing end to surround the second auxiliary spring.   
     
     
         5 . The oil pump according to  claim 2 ,
 wherein the main spring is disposed such that one end is in contact with the main pressing end and the other end is in contact with the inner wall of the housing portion, and the oil flowing into the variable chamber presses the stator portion toward a side opposite to a direction in which the outer ring is pressed.   
     
     
         6 . The oil pump of  claim 5 ,
 wherein the housing portion is formed of a second guiding groove on the inner wall on a side opposite to the main spring on the basis of the main pressing end, and   wherein the guiding portion further includes a second guiding member installed on the outer circumferential surface of the outer ring and slidably installed in the second guiding groove.   
     
     
         7 . The oil pump of  claim 6 ,
 wherein the first guiding groove is formed along a direction away from the main spring at a position adjacent to the main spring, and is formed along a direction opposite to a direction of a force applied to the main pressing end by the main spring, and   wherein the second guiding groove is formed to face the main pressing end side from the inner wall of the housing portion in which the variable chamber is formed.   
     
     
         8 . The oil pump of  claim 5 ,
 wherein the housing portion is formed of a second guiding groove on the inner wall on the first auxiliary pressing end side, and   wherein the guiding portion further includes a second guiding member installed on the outer circumferential surface of the outer ring and slidably installed in the second guiding groove.   
     
     
         9 . The oil pump according to  claim 1 ,
 wherein the stator portion further includes a third auxiliary pressing end that protrudes outward from a portion of the outer circumferential surface of the outer ring between the first guiding member and the main pressing end, and   wherein the main spring is disposed such that one end is in contact with the third auxiliary pressing end and the other end is in contact with the inner wall portion of the housing portion on the main pressing end side to pressurize the stator portion.   
     
     
         10 . The oil pump according to  claim 1 ,
 wherein the housing portion is formed of a second guiding groove on the inner wall on a side adjacent to the variable chamber,   wherein the guiding portion further includes a second guiding member installed on the outer circumferential surface of the outer ring and slidably installed in the second guiding groove, and   wherein the main spring is disposed such that one end is in contact with the main pressing end and the other end is in contact with a portion of the inner wall of the housing portion on a second guiding groove side to press the stator portion.