Brushless motor with tubular bearing support
First Claim
1. A brushless electric motor, which comprises:
- a stator assembly including a lamination core defining an inner space, and a heat sink;
a rotor assembly having a central shaft adapted for rotational movement relative to the stator assembly about the shaft; and
a tubular bearing support received within the inner space of the stator assembly adjacent to the lamination core and adjacent to the heat sink to facilitate a reduced axial length of the motor, the shaft being retained within a bearing assembly within the bearing support to allow rotation of the shaft and therefore of the rotor assembly with respect to the stator assembly;
wherein the heat sink comprises a baseplate and a plurality of fins extending from the baseplate and oriented in an axial direction, in substantial alignment with the shaft, said fins being disposed within the inner space of the lamination core.
1 Assignment
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Accused Products
Abstract
A brushless electric motor having an internal stator assembly including a lamination core and a heat sink. The motor includes an external rotor assembly adapted for rotational movement relative to the stator assembly about a central shaft. The motor also includes a tubular bearing support received within an inner space of the stator assembly adjacent to the lamination core and adjacent to the heat sink to facilitate a reduced axial length of the motor, the shaft being pressed into a bearing assembly retained within the bearing support to allow rotation of the shaft and therefore of the rotor assembly with respect to the stator assembly. The rotor assembly may have a cover with a central hub and a central shaft mounted within the hub. The motor may have a bearing assembly retained within the bearing support and receiving the shaft to allow rotational movement of the rotor assembly about the stator assembly.
88 Citations
26 Claims
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1. A brushless electric motor, which comprises:
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a stator assembly including a lamination core defining an inner space, and a heat sink; a rotor assembly having a central shaft adapted for rotational movement relative to the stator assembly about the shaft; and a tubular bearing support received within the inner space of the stator assembly adjacent to the lamination core and adjacent to the heat sink to facilitate a reduced axial length of the motor, the shaft being retained within a bearing assembly within the bearing support to allow rotation of the shaft and therefore of the rotor assembly with respect to the stator assembly; wherein the heat sink comprises a baseplate and a plurality of fins extending from the baseplate and oriented in an axial direction, in substantial alignment with the shaft, said fins being disposed within the inner space of the lamination core. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 21, 22, 23)
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10. A brushless electric motor, which comprises:
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(a) a stator assembly having a lamination core, a heat sink, and a tubular bearing support, the lamination core, the heat sink, and the bearing support each being mounted within the stator assembly; (b) a rotor assembly having a cover, a central hub and a central shaft mounted within the hub; and (c) a bearing assembly retained within the bearing support and receiving the shaft to allow rotational movement of the rotor assembly about the stator assembly; wherein the heat sink comprises a plurality of fins oriented in an axial direction, in substantial alignment with the shaft and the fins are disposed in an inner space defined by the lamination core. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 24, 25, 26)
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Specification