Busbar assembly for an electric motor

An electric motor comprising:

• a housing;
• a stator fixedly mounted inside of the housing and including a plurality of coils;
• a magnetized rotor rotatably mounted inside of the housing;
• and
• a busbar assembly provided on an axial end side of the stator;
• wherein
• the busbar assembly includes:
• a busbar holder, at least a portion of which is made of an electrically insulating material;
• and
• a plurality of busbars mounted on the busbar holder and arranged in a circumferential direction of the busbar holder;
• the plurality of busbars include:
• a base portion extending along a mounting surface of the busbar holder;
• at least one coil connection terminal portion to be electrically connected to the coil;
• and
• a power source connection terminal portion extending in a direction away from the busbar holder;
• the power source connection terminal portion extends from the base portion;
• at least a portion of the base portion includes a resilient member to allow a displacement of the power source connection terminal portion towards the busbar holder;
• the busbar assembly further includes a support to support the plurality of busbars on the busbar holder;
• the support protrudes from the busbar holder and extends alongside the power source connection terminal portion;
• the support surrounds at least a portion of an outer circumference of the power source connection terminal portion;
• the support includes an inner circumference complementary with the outer circumference of the power source connection terminal portion surrounded by the support;
• the support includes a slot having a width that is larger than a width of the base portion of the plurality of busbars;
• the busbar assembly further includes:
• a support to support the at least one busbar on the busbar holder, the support protruding from the busbar holder and extending adjacently to the power source connection terminal portion;
• at least one stopper on the power source connection terminal portion;
• and
• a contact on the support which contacts the at least one stopper;
• and
• the at least one stopper is located to limit a displacement of the power source connection terminal portion in a direction away from the busbar holder through the contact;
• and
• the at least one stopper and the contact respectively include engagement members to be brought into mutual engagement when no external force is applied onto the power source connection terminal portion in a direction towards the busbar holder, and to be brought out of mutual engagement upon application of a force onto the power source connection terminal portion in the direction towards the busbar holder.