| 摘要 |
PROBLEM TO BE SOLVED: To provide a negative pressure pump capable of suppressing wear debris from being sucked into a motor.SOLUTION: On one side face 34 of a body part 30, a respiratory hole 121 is provided at a position away from an exhaust path 104 for supplying air from the vicinity of a motor shaft 72 to a motor. The respiratory hole 121 is provided for supplying air to the motor to prevent the inside of the motor from becoming vacuum. Since the respiratory hole is disposed in a portion away from the exhaust passage, exhaust gas containing wear debris is prevented from immediately reaching the respiratory hole and wear debris can be suppressed from being sucked into the motor. As a result, durability of the motor can be improved. |
