Bus bar unit, motor and method for assembling bus bar unit

An bus bar unit, a motor and a method for assembling the bus bar unit are provided to simplify the assembly of a bus bar and reduce cost. The bus bar unit (50) is used in a motor (100) having a stator(30). The bus bar unit (50) includes more than one bus bar (52U, 53V, 54W), a bus bar holder (60), and a retaining member (70). The bus bars (52U, 53V, 54W) are electrically connected to the stator (30). The bus bar holder (60) is disposed on the upper side in the axial direction of the stator (30) and has an insertion groove (64) into which the bus bars (52U, 53V, 54W) are inserted from the lower side in the axial direction. The retaining member (70) is attached to the bus bar holder (60) and prevents the bus bars (52U, 53V, 54W) from coming off. 提供汇流条单元、马达以及汇流条单元的组装方法，实现了汇流条组装的简化和成本的降低。汇流条单元(50)用于具有定子(30)的马达(100)。汇流条单元(50)具有：1个以上的汇流条(52U、53V、54W)、汇流条保持架(60)以及防脱部件(70)。汇流条(52U、53V、54W)与定子(30)电连接。汇流条保持架(60)配置于定子(30)的轴向上侧，具有供汇流条(52U、53V、54W)从轴向下侧插入的插入槽(64)。防脱部件(70)安装于汇流条保持架(60)，防止汇流条(52U、53V、54W)脱落。