| 摘要 |
A negative pressure pump (10) has: a closed-bottom cylindrical housing (20) into which lubricant is supplied and which has a circular hole (32) formed in the bottom section (24) of the housing (20); a rotating shaft (40) which is provided with a shaft section (42) fitted into the circular hole (32) and which is also provided with a support section (44) inserted and disposed within the housing (20); a vane (50) which is supported by the support section (44) so as to be capable of reciprocating in the direction perpendicular to the rotating shaft (40), rotates together with the rotating shaft (40), has an end section (50B) sliding on an inner wall surface (22A), and divides the inside of the housing (20) into spaces; a suction section (30) which is formed in the housing (20); a discharge section (34) which is formed downstream of the suction section (30) in the rotational direction of the vane; and a recess (60) which is formed in a bottom surface (24A) at a position between the discharge section (34) and a curved surface (28) in the rotational direction of the vane, connects to the circular hole (32), and guides the lubricant to the circular hole (32), the lubricant being moved by the vane (50). |
