An electric work machine includes: a motor comprising a stator including coils, a rotor rotatable relative to the stator, and a rotor shaft fixed to the rotor; an output unit driven by the rotor shaft; a motor case including a main body having an insertion opening, and a lid disposed on one side in an axial direction relative to the main body and connected to the main body to close the insertion opening; and a resin portion that includes a first portion covering the coils and a second portion disposed on one side in the axial direction relative to the first portion. The first and second portions are integrated. Each of the first and second portions has a tubular shape. A second inner diameter indicating an inner diameter of the second portion is larger than a first inner diameter indicating an inner diameter of the first portion.

A method for producing a winding mat for a stator or a rotor of an electric motor includes providing two conductor strands with at least one conductor in each instance; feeding the conductor strands in each instance to a receiving device along an X direction of a Cartesian coordinate system; simultaneously forming oppositely arranged winding heads at the two conductor strands, each forming a gable. A layer step is stamped in the gables preferably simultaneously. Subsequently, bars extending in opposite direction are formed before the receiving devices are detached from the conductor strands, and the conductor strands are transported by one conveying cycle. The above-mentioned steps are repeated until a winding mat with a defined quantity of windings comprising two winding heads and four bars, respectively, has been produced.

A method for producing a winding mat for a stator or a rotor of an electric motor includes providing two conductor strands with at least one conductor in each instance; feeding the conductor strands in each instance to a receiving device along an X direction of a Cartesian coordinate system; simultaneously forming oppositely arranged winding heads at the two conductor strands, each forming a gable. A layer step is stamped in the gables preferably simultaneously. Subsequently, bars extending in opposite direction are formed before the receiving devices are detached from the conductor strands, and the conductor strands are transported by one conveying cycle. The above-mentioned steps are repeated until a winding mat with a defined quantity of windings comprising two winding heads and four bars, respectively, has been produced.

The unit coil is formed by: bending the coil end portions of the intermediate body such that, in a layer in which a length in an axial direction between the coil end portions is large, positions of the coil end portions projecting furthest from the accommodation portions in the axial direction move away from positions of the accommodation portions in the stacking direction, compared to the previous state; and aligning the positions, in the axial direction, of the coil end portions at an inner side of the annular shape, for each of the layers.

A coil alignment device includes: a plate-shaped first jig having a plurality of grooves arranged along a circumferential direction so as to extend toward a radial-direction outer side; and a second jig that can contact with a segment coil inserted in the first jig. Each groove includes a storage portion extending along a radial direction and having a first length so that leg portions of the segment coils can be stored side by side in the radial direction, and a guiding portion extending from the storage portion toward the radial-direction outer side, and has a first shape so that, using, as a fulcrum, one leg portion inserted in the storage portion, the other leg portion is movable toward the storage portion. The second jig is movable to press the segment coil from a radial-direction side and store the other leg portion into the storage portion.

A coil alignment device includes: a plate-shaped first jig having a plurality of grooves arranged along a circumferential direction so as to extend toward a radial-direction outer side; and a second jig that can contact with a segment coil inserted in the first jig. Each groove includes a storage portion extending along a radial direction and having a first length so that leg portions of the segment coils can be stored side by side in the radial direction, and a guiding portion extending from the storage portion toward the radial-direction outer side, and has a first shape so that, using, as a fulcrum, one leg portion inserted in the storage portion, the other leg portion is movable toward the storage portion. The second jig is movable to press the segment coil from a radial-direction side and store the other leg portion into the storage portion.

A segmented stator for an electric motor comprises: a plurality of tooth segments arranged in a circular configuration, the tooth segments having body portions and front surfaces extending inward from the body portions; and wire wound on the body portions. A distance between adjacently positioned front surfaces of the tooth segments is less than a width of the wire. The wire wound on the body portions substantially fills space between adjacently positioned tooth segments.

A segmented stator for an electric motor comprises: a plurality of tooth segments arranged in a circular configuration, the tooth segments having body portions and front surfaces extending inward from the body portions; and wire wound on the body portions. A distance between adjacently positioned front surfaces of the tooth segments is less than a width of the wire. The wire wound on the body portions substantially fills space between adjacently positioned tooth segments.

A method and device for producing a winding mat for a stator or rotor of an electric motor, in which two conductor strands are each fed to a respective receiving device along an X direction. Oppositely disposed winding heads are formed by a shaping tool and a layer step is stamped in the winding heads in the opposite sense in a Y direction. Bars that extend in a Z direction are formed by a movement of the receiving devices on a curved path, and a lifting movement of the receiving devices is carried out. The conductor strands are transferred to a conveying device and transported in X direction by one conveying cycle. The steps are repeated until a winding mat has been produced having a defined quantity of windings formed in each instance by the two conductor strands and in each instance comprise two winding heads and four bars.

A method and device for producing a winding mat for a stator or rotor of an electric motor, in which two conductor strands are each fed to a respective receiving device along an X direction. Oppositely disposed winding heads are formed by a shaping tool and a layer step is stamped in the winding heads in the opposite sense in a Y direction. Bars that extend in a Z direction are formed by a movement of the receiving devices on a curved path, and a lifting movement of the receiving devices is carried out. The conductor strands are transferred to a conveying device and transported in X direction by one conveying cycle. The steps are repeated until a winding mat has been produced having a defined quantity of windings formed in each instance by the two conductor strands and in each instance comprise two winding heads and four bars.