| 摘要 |
A cover end of a fuel pump is formed by resin molding and has a tubular portion, which holds a bearing that is placed along a central axis of the tubular portion and rotatably supports one end portion of a shaft of a motor arrangement. Furthermore, three terminals, which supply three-phase electric power received from an outside to windings on a phase-by-phase basis, are insert molded in the cover end. In the cover end, a first transverse passage, which is formed between the first terminal and the second terminal in a circumferential direction, and a second transverse passage, which is formed between the second terminal and the third terminal in the circumferential direction, are configured into a form of V-shape, which diverges in a radially outer direction, in a view taken in an axial direction. |
| 主权项 |
1. A liquid pump comprising:
a motor arrangement that has:
a stator, in which a plurality of windings is wound around cores; anda rotor, which includes a plurality of magnetic poles and is rotated about a rotational axis of a shaft by a magnetic field generated at the stator; a housing that is configured into a tubular form and receives the stator and the rotor, wherein a plurality of outer passages, each of which passes between an inner wall of the housing and an outer wall of the stator and extends through the motor arrangement in an axial direction, is formed in the housing; a cover end that is resin molded integrally with one end portion of the stator on one axial side of the motor arrangement and closes an opening of the housing, wherein:
a tubular portion, which holds a bearing that rotatably supports one end portion of the shaft, is formed along a central axis at a side of the cover end where the motor arrangement is located;a discharge conduit, which has a discharge passage in an inside of the discharge conduit, is formed at an opposite side of the cover end, which is opposite from the motor arrangement; anda first terminal, a second terminal and a third terminal, which supply three-phase electric power received from an outside to the plurality of windings on a phase-by-phase basis, are insert molded in the cover end; and a pump arrangement that includes a rotatable member, which is rotated together with the rotor on another axial side of the motor arrangement to pump liquid, wherein: the first terminal, the second terminal and the third terminal are arranged one after another in this order at predetermined intervals in a circumferential direction on an opposite side of an imaginary plane that includes the central axis of the cover end, wherein the opposite side of the imaginary plane is opposite from another side of the imaginary plane where the discharge conduit is formed; the cover end includes a plurality of transverse passages, which are formed by a plurality of slide mold parts, while each of the plurality of transverse passages radially communicates a corresponding one of the plurality of outer passages to an inner passage, which is formed around the tubular portion and is communicated with the discharge passage; and the plurality of transverse passages includes a first transverse passage, which is formed between the first terminal and the second terminal in the circumferential direction, and a second transverse passage, which is formed between the second terminal and the third terminal in the circumferential direction, while the first transverse passage and the second transverse passage are configured into a form of V-shape, which diverges in a radially outer direction, in a view taken in the axial direction. |
