| 摘要 |
This invention relates to a jack with a safety device for automobile maintenance and repair, which includes a base, raising arms installed on the two side panels of the base, a platform installed on the top of the raising arms, and an oil pump to drive the raising arms. The jack may further have two safety devices, each of which includes a rack with reversed gears, a movable safety block to lock the rack, a mechanical linkage system to drive the movable safety block. Each rack may be attached to the bottom of one of the raising arms. The movable safety block may be hinged to the side panel on the same side of the jack as the safety block via an axel hinge. The jack has the characteristics of good safety, simple structure and ease to use. |
