| 摘要 |
A top drive apparatus comprising a drive shaft (16), a motor apparatus (14), a motor shaft (9) extending from the motor apparatus (14), a gear system (25) arranged in a gear housing (102,107), the gear system (25) driven by the motor shaft (9), the gear system (25) driving the drive shaft (16), characterised in that the gear system (25) comprises a planetary carrier (114), a single bearing (117) adjacent and in contact with the planetary carrier (114), a bearing cartridge (115) fitted to the gear housing (102,107), and the bearing cartridge (115) abutting the single bearing (117) and in contact with and holding the single bearing (117) in position with respect to the planetary carrier (114). |
