| 摘要 |
A pump actuation motor includes a yoke (15), a rotation shaft (12) that has, on one end side, a supported shaft portion (12d) that is inserted into and supported by a block body (9) and an eccentric shaft portion (12c) that actuates the plunger pumps (5) and (6) and, on the other end side, a rotor and a commutator (22) attached therearound, a brush holder (23) that holds a brush (24) that can supply electric power from-the block body (9) side to the commutator (22), and a housing (26) that is so mounted between the yoke (15) and the block body (9)side as to cover an opening of such yoke (15), wherein the rotation shaft (12) includes a recessed portion (12a) that opens on an end surface of the other end side while the yoke (15) includes a protruding portion 15a that protrudes into the recessed portion (12a) that is formed as a part of such yoke (15), and the other end side of the rotation shaft (12) is supported by such protruding portion (15a).
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