Electric work machine
An electric work machine reduces noise from the electric work machine. An electric work machine includes a motor including a stator including a stator core and coils, and a rotor including a rotor core and a rotor shaft, an output unit located frontward from the motor and rotatable with a rotational force from the motor, a first support having a first contact surface in contact with a front end face of the stator core, a second support having a second contact surface in contact with a rear end face of the stator core, and a screw connecting the first support and the second support and fastening the stator core to the first support and the second support in a front-rear direction.
1. An electric work machine, comprising:
a motor including
a stator including a stator core and coils attached to the stator core, and
a rotor including a rotor core and a rotor shaft fixed to the rotor core;
an output unit located frontward from the motor and rotatable with a rotational force from the motor;
a first support having a first contact surface in contact with a front end face of the stator core;
a second support having a second contact surface in contact with a rear end face of the stator core; and
a screw connecting the first support and the second support and fastening the stator core to the first support and the second support in a front-rear direction,
wherein the first support includes
a plate, and
a screw boss protruding rearward from a peripheral edge of the plate and receiving the screw, and
the first contact surface is located in the screw boss.
2. The electric work machine according to claim 1 , further comprising:
a housing including a motor compartment accommodating the motor, the first support, the second support, and the screw, the housing comprising a synthetic resin, the housing including a left housing and a right housing fixed to the left housing.
3. The electric work machine according to claim 1 , wherein the first support includes a rear end apart from a front end of the second support.
4. The electric work machine according to claim 1 , wherein
the first support has a plurality of the first contact surfaces located circumferentially at intervals.
5. The electric work machine according to claim 1 , wherein
the first support has a third contact surface in contact with an outer circumferential surface of the stator core.
6. The electric work machine according to claim 5 , wherein
the first support has a plurality of third contact surfaces located circumferentially at intervals.
7. The electric work machine according to claim 1 , further comprising:
a bearing supporting a front portion of the rotor shaft,
wherein the first support holds the bearing.
8. The electric work machine according to claim 7 , wherein
the plate includes a holder holding the bearing.
9. The electric work machine according to claim 8 , wherein
the first support includes a plurality of the screw bosses located circumferentially at intervals, and
the first contact surface is located in each of the plurality of screw bosses.
10. The electric work machine according to claim 8 , wherein
the first support has a third contact surface in contact with an outer circumferential surface of the stator core, and
the third contact surface is located rearward from the first contact surface in the screw boss.
11. The electric work machine according to claim 1 , wherein
the second support has a plurality of the second contact surfaces located circumferentially at intervals.
12. The electric work machine according to claim 1 , wherein
the second support has a fourth contact surface in contact with an outer circumferential surface of the stator core.
13. The electric work machine according to claim 12 , wherein
the fourth contact surface surrounds the outer circumferential surface of the stator core.
14. An electric work machine, comprising:
a motor including
a stator including a stator core and coils attached to the stator core, and
a rotor including a rotor core and a rotor shaft fixed to the rotor core;
an output unit located frontward from the motor and rotatable with a rotational force from the motor;
a first support having a first contact surface in contact with a front end face of the stator core;
a second support having a second contact surface in contact with a rear end face of the stator core; and
a screw connecting the first support and the second support and fastening the stator core to the first support and the second support in a front-rear direction, wherein
the second support includes
a ring surrounding an outer circumferential surface of the stator core, and
a protrusion protruding radially inward from an inner circumferential surface of the ring, and
the second contact surface is located in the protrusion.
15. The electric work machine according to claim 14 , wherein
the protrusion includes a plurality of the protrusions located circumferentially at intervals,
the second contact surface includes a plurality of the second contact surfaces, and
each of the plurality of the second contact surfaces is located in each of the plurality of protrusions.
16. The electric work machine according to claim 14 , wherein
the second support has a fourth contact surface in contact with the outer circumferential surface of the stator core, and
the fourth contact surface includes a portion of the inner circumferential surface of the ring located frontward from the protrusion.
17. The electric work machine according to claim 1 , wherein
the electric work machine includes four of the screws arranged circumferentially at intervals.
18. The electric work machine according to claim 1 , further comprising:
a fan fixed to a rear portion of the rotor shaft,
wherein the second support includes a rear end located frontward from the fan.
19. The electric work machine according to claim 18 , wherein
the screw includes a rear end located frontward from the fan.
20. The electric work machine according to claim 1 , wherein
the first support is formed of a metal, and
the second support is formed of a metal.