Brushed electric motor (10), comprising an outer case (11), two brushes and further a rotor (30) having a first inner end (31) and a second outer end (32) which is inserted within the outer case (11), the brushed electric motor (10) is usable in environments with a risk of fire or explosion or in presence of potentially explosive or flammable fluids, and comprises at least a filler element (20) made with a polymer based material which is positioned internally to the outer case (11) of said brushed electric motor (10) for minimize the free volume within the brushed electric motor (10) itself and for allow at the same time to maintain a high power and high performance characteristics of the brushed electric motor (10), by minimizing the possibility of triggering a burst or fire.

Example brush holder assemblies of an electric machine are disclosed. An example brush holder assembly of an electric machine includes a carbon brush including an upper surface and a lower surface opposite the upper surface. The brush holder assembly also includes one or more lead wires extending out of the carbon brush at an insertion point on the upper surface and a first cavity extending into the carbon brush from the upper surface at a location spaced away from the insertion point of the one or more lead wires and unobstructed by the one or more lead wires.

A brush assembly (100) for a slip ring assembly of a rotating electrical machine, having at a brush holder (120) defining a cage into which a brush (103) slides; and a rod (101) extending along a second axis (D2) parallel to the first axis, for supporting the brush holder. One of the rod and the brush holder defines a recess (121), the other has a portion sized to be received into the recess the mating portion (105), the recess defined by a first wall (123, 124) disposed for abutment against the mating portion when, the mating portion received in the recess, the brush holder is driven longitudinally along the rod parallel to the second axis. The recess is defined by a second wall (122) disposed for abutment against mating portion when, the mating portion received in the recess, the brush holder is driven tangentially around the second axis.

A motor includes a commutator, a bracket including a conductive brush, first and second wall parts, and first and second deformable parts. The conductive brush is in contact with the commutator. The first wall part includes a first surface extending along a first surface of the conductive brush. The second wall part includes a second surface extending along a second surface of the conductive brush located on a side opposite the first surface of the conductive brush. The first deformable part is in contact with both the first surface of the conductive brush and the first surface of the first wall part, and is deformable in response to movement of the conductive brush. The second deformable part is in contact with both the second surface of the conductive brush and the second surface of the second wall part, and is deformable in response to movement of the conductive brush.

Provided is a permanent magnet brush micromotor and an assembly method thereof. Its upper stator bracket and lower stator bracket are designed to fit together, and the concave parts of the upper stator bracket and lower stator bracket are matched to form a complete mounting cavity for mounting a motor shaft, core winding, bearings and commutator. The core winding, bearings and commutator are installed on the motor shaft to form a mover assembly, and then the mover assembly is installed in the concave part of the lower stator bracket. Finally, combining and fixing the upper stator bracket and lower stator bracket with electric brushes which are respectively placed in brush mounting positions. And, two bearings are fixed or pressed on the same component, so that the concentricity and coaxiality of the bearings can be ensured, the compression of the central biasing force is avoided during assembly.

An example brush holder assembly for positioning a conductive carbon brush in contact with a conductive surface of an electrical device is disclosed. In some aspects, the example brush holder assembly includes a brush holder including a backbone extending therefrom and a removable handle. Further, the removeable handle includes a frame releasably engaged with the backbone and a grip secured to the frame. In some aspects, the brush holder assembly includes a removable catch arm removably coupled to an upper beam and a lower beam of the brush holder assembly. Removal of the catch arm allows the upper beam to be disassembled from the lower beam.

An example brush holder assembly for positioning a conductive carbon brush in contact with a conductive surface of an electrical device is disclosed. In some aspects, the example brush holder assembly includes a brush holder including a backbone extending therefrom and a removable handle. Further, the removeable handle includes a frame releasably engaged with the backbone and a grip secured to the frame. In some aspects, the brush holder assembly includes a removable catch arm removably coupled to an upper beam and a lower beam of the brush holder assembly. Removal of the catch arm allows the upper beam to be disassembled from the lower beam.

A motor according to an embodiment includes a commutator provided to a rotation shaft, a brush in contact with the commutator, a bracket having a wall surface opposing the brush, and a deformable portion in contact with the brush and the wall surface. The bracket includes a protrusion provided on the commutator side with respect to the deformable portion. The protrusion protrudes from the wall surface toward the brush.

This motor includes a yoke, an armature, a brush holder and a ground member. The yoke has the shape of a bottomed cylinder that has an inner surface to which a magnet is affixed. The armature is contained within the yoke. The brush holder is arranged in an opening of the yoke, and holds a feed brush for supplying an electric current to the armature, and a bearing that axially supports a rotary shaft of the armature. The ground member is in contact with the bearing and the yoke. The ground member is affixed to a ground terminal that is held by the brush holder.

This motor includes a yoke, an armature, a brush holder and a ground member. The yoke has the shape of a bottomed cylinder that has an inner surface to which a magnet is affixed. The armature is contained within the yoke. The brush holder is arranged in an opening of the yoke, and holds a feed brush for supplying an electric current to the armature, and a bearing that axially supports a rotary shaft of the armature. The ground member is in contact with the bearing and the yoke. The ground member is affixed to a ground terminal that is held by the brush holder.