Sliding bearing and sliding bearing assembly

1. A sliding bearing having a lubricating oil storing unit for storing lubricating oil on a surface thereof,

the lubricating oil storing unit includes a first lubricating oil storage provided on an inner peripheral surface of the sliding bearing and a second lubricating oil storage provided on an outer peripheral surface of the sliding bearing,

wherein the first lubricating oil storage unit comprises at least one ring groove formed in a circumferential direction of the sliding bearing and at least three pocket grooves each having a dent puddle shape,

wherein the volume of the lubricating oil storing unit occupies 8.3 to 11.6 volume % of the entire volume of the sliding bearing,

wherein a surface area of the first lubricating oil storage on the inner peripheral surface of the sliding bearing is 20.8 to 48.1% of the entire area of the inner peripheral surface of the sliding bearing,

wherein a surface area of the second lubricating oil storage unit on the outer peripheral surface of the sliding bearing to the entire area of the outer peripheral surface of the sliding bearing is 15 to 40%,

wherein an inclination angle between the first lubricating oil storage and the inner peripheral surface of the sliding bearing is in the range of 120 to 160 degrees,

wherein a ratio of the length of a pocket groove in a longitudinal direction of the sliding bearing to the length of the pocket groove in a circumferential direction of the sliding bearing is at least 1,

wherein a ratio of the length of the pocket groove in the longitudinal direction of the sliding bearing to an entire length of the sliding bearing is 1/20 to 1/2,

wherein the ratio of length of the pocket groove in the circumferential direction of the sliding bearing to a circumferential length of the inner peripheral surface of the sliding bearing is 1/100 to 1/20,

wherein the depth of the first lubricating oil storage unit is 2/5 or less of the thickness of the sliding bearing,

wherein the depth of the second lubricating oil storage unit is 2/5 or less of the thickness of the sliding bearing.

2. The sliding bearing according to claim 1 , wherein the lubricating oil storing unit includes at least one passage connecting the first lubricating oil storage and the second lubricating oil storage.

3. The sliding bearing according to claim 1 , wherein the depth of each of the at least three pocket grooves is in the range of 0.5 to 3 mm.

4. A sliding bearing assembly, comprising:

a shaft;

a sliding bearing of claim 1 that rotates or shakes by receiving the shaft;

and a boss receiving the sliding bearing.

5. The sliding bearing assembly according to claim 4 , further comprising;

a dust seal provided at both sides of the sliding bearing,

wherein the dust seals are provided to be separated from both ends of the sliding bearing by intervals in the range of 0 to 15 mm.