The invention relates to a jack structure, comprising a base. The jack structure is characterized in that the base is provided with an accommodating groove; the accommodating groove is internally provided with at least three screw rods which are sequentially coaxially arranged together in a sleeving manner; apart from the innermost screw rod, the screw rods are all provided with holes used for accommodating the adjacent inner layer screw rods; each screw rod is provided with external screw threads and the upper part of each hole is provided with internal screw threads; the base is also provided with a drive device; the output end of the drive device is in threaded connection with the outermost screw rod; limiting members used for limiting the jacking stroke of the adjacent inner layer screw rods are arranged between the output end of the drive device and the outermost screw rod, and between the outermost screw rod and the adjacent inner layer screw rod; the top parts of the screw rods are in drive connection with support bases used for supporting articles to be jacked. The jack structure has the advantages of simple structure, convenient usage, labor-saved operation, and stable and reliable movement. Under the premise of not changing the original size and weight, the jacking stroke of the jack structure can be multiplied. The jack structure disclosed by the invention is particularly used as a vehicle-mounted jack.
Jack structure
2015-07-15
Patent
Electronic Resource
English
IPC: | B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last |