| 摘要 |
The present invention provides a safety device (10) for elevators. The safety device (10) includes a housing (110); a safety piece (120) having a guide rail groove (121), the safety piece (120) being disposed in the housing (110); and asymmetric active and counter wedges (130,140) that are slidably disposed on the safety piece (120) at both sides of the guide rail groove (121), respectively. Moreover, the device further includes a U-shaped elastic element (150) and a blocking piece (160) that are disposed on the safety piece (120). The safety device (10) can provide a relatively stable arresting force, is reliable in repetitive work, achieves high safety, is relatively easy as well as fast and efficient in restoration, and is especially suitable for high-speed elevators. |
