Rotating mechanism and method for supplying lubricant

Abstract

The positional relationship between the supply port for supplying lubricant to a bearing containing a nearly cylindrical rotating member and the discharge port for discharging lubricant, as well as the rotational motion of the bearing, are considered to suppress lubrication failure on the sliding surface of the rotating member. [Solution] The rotating mechanism 1 includes a bearing 10 which comprises a substantially cylindrical rotating member 11 consisting of a first bottom surface 111 and a second bottom surface 112 that slide against the inner ring 12, and a side surface 113 that is continuous therewith and rolls on the surface 121 of the inner ring 12 and the surface 131 of the outer ring 13; a supply port 14 for supplying lubricant located near the first bottom surface 111 which is further from the axis of the bearing 10 than the second bottom surface 112; and a discharge port 17 for discharging lubricant located near the second bottom surface 112 of the rotating member 11.

Claims

1. A bearing comprising a substantially cylindrical rotating member positioned between an inner ring and an outer ring, comprising a first bottom surface and a second bottom surface that slide against the inner ring, and a surface continuous with the first bottom surface and the second bottom surface that rolls on the surface of the inner ring and the surface of the outer ring, A supply port for supplying lubricant is located near the first bottom surface, which is further from the bearing axis than the second bottom surface, A discharge port for discharging the lubricant is located near the second bottom surface, A rotating mechanism characterized by having the following features.

2. The circumferential phases of the supply port and the discharge port are different, The rotating mechanism according to claim 1.

3. The angle between the extension line passing through the axis and the supply port and the extension line passing through the axis and the discharge port is 100 degrees or more and 180 degrees or less. The rotating mechanism according to claim 2.

4. A retaining space capable of holding the lubricant is formed in a part of the flow path between the supply port and the first bottom surface, extending in the direction opposite to the axial position of the first bottom surface relative to the axial position of the supply port. The rotating mechanism according to claim 1.

5. The flow path for the lubricant is such that the lubricant that has flowed across the second bottom surface flows to the ball bearing. The aforementioned discharge port is characterized by discharging the lubricant that has flowed through the ball bearing. The rotating mechanism according to claim 1.

6. A method for supplying lubricant to a rotating mechanism having a bearing that includes a substantially cylindrical rotating member, which is positioned between an inner ring and an outer ring and comprises a first bottom surface and a second bottom surface that slides against the inner ring, and a surface continuous with the first bottom surface and the second bottom surface that rolls on the surface of the inner ring and the surface of the outer ring, A supply step of supplying lubricant from a supply port located near the first bottom surface, which is further from the bearing axis than the second bottom surface, A discharge step in which the lubricant that has flowed over the second bottom surface is discharged from a discharge port located near the second bottom surface, A method for supplying a lubricant, characterized by containing [a certain substance].

7. The method further includes an evaluation step of evaluating the diffusion state of the lubricant based on the magnitude of the angle between the extension line connecting the axis and the supply port and the extension line passing through the axis and the discharge port. The method for supplying a lubricant according to claim 6.

8. The evaluation step is characterized in that the closer the angle is to 180 degrees, the higher the diffusion state of the lubricant is evaluated. The method for supplying a lubricant according to claim 7.

9. In the supply step, the lubricant that has flowed across the second bottom surface is then flowed through the ball bearing. The discharge step is characterized by discharging the lubricant that has flowed through the ball bearing. The method for supplying a lubricant according to claim 6.

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