| 摘要 |
In one implementation, a liquid pump (10) includes a pumping element (12), an electric motor (14) and a brush housing. The electric motor is coupled to the pumping element to drive the pumping element for rotation, and the motor has a commutator (20), brushes (44) engaged with the commutator to provide electricity to the commutator and at least one biasing member (52) yieldably biasing the brushes into engagement with the commutator. The brush housing defines brush cavities (36) in which the brushes are received, where the brushes have a first surface (46) engaged with the commutator and a second surface (48) spaced from the first surface and acted upon by said at least one biasing member. The second surface is inclined at an acute included angle relative to the first surface. |
