| 摘要 |
A two speed drive (10) has an input shaft (12) and an output shaft (22). Between the input shaft (12) and the output shaft (22) is a brake assembly (16), a planetary gear train (20) and a clutch assembly (18). The two speed drive (10) is shifted to a high speed when the brake assembly (16) is disconnected and the clutch (18) is connected. The low speed is achieved when the brake (16) is connected and the clutch (18) is disconnected. Braking of the output shaft (22) is achieved by having the brake (16) and the clutch (18) connected. The brake assembly (16) and the clutch assembly (18) are of the spring-engaged, electric-release type.
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