Patent ID: 11905775
Assignee: SHENZHEN UNIVERSITY
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 4:
5. The driving system for a core drilling rig according to claim 1, further comprising an outer cylinder unlocking module that comprises a connecting pipe (21) and the lock pin (22), wherein a rear end of the connecting pipe (21) is connected to the lock body (11), while a rear end of the lock pin (22) is connected to the locking rod (12), the lock pin (22) is disposed in the connecting pipe (21), wherein a front section of the connecting pipe (21) is connected in the outer cylinder (23), and a side wall of the front section of the connecting pipe (21) has an unlocking hole, a groove A (221) is disposed on the outer wall of the lock pin (22), a groove B (231) is disposed on an inner wall of the outer cylinder (23), and a pin (24) is arranged in the unlocking hole, a length of the pin (24) is greater than a depth of the unlocking hole, a width of groove A (221) is not less than a width of the inner end of the pin (24), a width of the groove B (231) is not less than a width of an outer end of the pin (24), a front end of the connecting pipe (21) is disposed in the outer cylinder (23), and the pin (24) is disposed in front of the groove A (221), wherein an inner end surface of the pin (24) is in sliding fit with an outer wall of the lock pin (22), and the outer end of the pin (24) is embedded in the groove B (231).