The invention discloses a multi-stage jack structure with a single-stage lead screw driving a plurality of lead screw nuts, which belongs to the technical field of electric push rod application and comprises a pair of bevel gears, a lead screw pair assembly, a first-stage nut, a second-stage nut, a first-stage push rod assembly, a second-stage push rod assembly, a bearing and a jack shell assembly. A lead screw pair is matched with a first-stage nut, a second-stage nut and other multi-stage nuts to form a multi-stage lead screw transmission pair, a lead screw is divided into a threaded section (effective section) and a non-threaded section (ineffective section), the first-stage nut and the second-stage nut can both occupy the effective section and the ineffective section of the lead screw pair, the multiple nuts are driven by the single lead screw pair, and one-by-one stretching and retracting of the multi-stage nuts are achieved. Through the simple structure, the overall dimension is far smaller than that of a traditional multi-stage jack, the overall structure is more compact and reliable, the production and machining technology is simple, and the production cost is reduced.

    本发明公开了一种单级丝杠驱动多个丝杠螺母的多级千斤顶结构,属于电动推杆应用技术领域,包括一对伞齿、丝杠副组件、一级螺母、二级螺母、一级推杆组件、二级推杆组件、轴承以及千斤顶壳体组件,丝杠副与一级螺母、二级螺母等多级螺母配合组成多级丝杠传动副,丝杠上分有螺纹段(有效段)与无螺纹段(无效段),一级螺母与二级螺母均可在丝杠副的有效段与无效段占位,采用单丝杠副驱动多个螺母,实现多级螺母的逐个伸缩,通过简单的结构,不仅使外形尺寸远远小于传统多级千斤顶,整体结构更加紧凑、可靠,而且生产加工工艺简单,降低了生产成本。


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    Title :

    Multi-stage jack structure with single-stage lead screw driving multiple lead screw nuts


    Additional title:

    一种单级丝杠驱动多个丝杠螺母的多级千斤顶结构


    Contributors:
    SONG FANG (author) / LAN HAIQIANG (author)

    Publication date :

    2022-04-29


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    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



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