| 摘要 |
A drive has a hub with first and second end portions and a shoulder located thereon. An armature and sheave assembly is located on bearings on the hub first end portion. The armature forms a cavity for receiving an electromagnet, which abuts against the shoulder. Slip rings are coupled to the electromagnet by way of a fan and a slip ring shaft. The slip rings, which are adjacent to the second end of the hub, can be of a small diameter to extend brush life. In addition, the same size slip rings can be used on different sizes of the drive. Two piece brush holders are provided for each brush. Each brush holder can be disassembled into its respective pieces for cleaning. The brush holders and slip rings can be protected from the environment by a cover.
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