| 摘要 |
FIELD: transport. ^ SUBSTANCE: lifting machine with friction-type drive pulley or lifting machine with drum winch comprises motor 5 to drive lifting cables 11, motor rotor being jointed with cylinder jacket 4 of drive pulley 2. Stator frame 7 is secured on bearing structure that has hollow shaft 3. Motor 5 is arranged inside cylinder jacket 4 and between boards 13 of drive pulley 2 in hollow chamber 12 whereto cooling air may be fed to forced cooling of motor 5. Hollow shaft 3 consists of, at least, two parts 18 and 19 that, together with thrust disk 8 and stator frame 7, make bearing structure 10. Note here that hollow shaft 3 has drilled bores to feed and discharge cooling air communicated with hollow chamber 12. Optionally, hollow shaft parts 18 and 19 may form beating structure with lateral thrust disks interconnecting hollow shaft and stator frame 7. Note here that partition is arranged between thrust disks while lateral thrust disks have bores. ^ EFFECT: compact design, improved cooling. ^ 16 cl, 5 dwg |
