Slide bearing

A slide bearing for supporting a load, comprising:

• an upper case;
• a lower case combined with the upper case;
• a center plate in a substantial annular shape, being located between the upper case and the lower case;
• and
• a sliding sheet in a substantial annular shape, being located between the center plate and the upper case or between the center plate and the lower case,
• the center plate comprising:
• a bearing surface slidable with the sliding sheet;
• a back face being located on an opposite side from the bearing surface;
• and
• an annular groove formed on the bearing surface,
• the annular groove comprising:
• an annular recess section as a groove bottom section of the annular groove;
• an inner circumferential surface being continuous with an inner edge of the annular recess section and with the bearing surface to incline inwardly in the radial direction from the inner edge of the annular recess section toward the bearing surface;
• and
• an outer circumferential surface being continuous with an outer edge of the annular recess section and with the bearing surface to incline outwardly in the radial direction from the outer edge of the annular recess section toward the bearing surface,
• an intersection between an extension of the inner circumferential surface and an extension of the outer circumferential surface forming a circle and being positioned closer to the bearing surface than to the back face of the center plate,
• the annular recess section reaching deeper from the bearing surface than a position of the circle of the intersection.