The invention relates to a hydraulic oil cylinder, and aims to solve the problems of violent fluctuation of buffer pressure on a forklift lifting oil cylinder and the like. The oil cylinder is composed of a cylinder body assembly and a piston rod assembly, wherein the piston rod assembly is composed of a piston rod and a piston, the piston divides an inner space of the oil cylinder into a rod cavity and a rodless cavity, the piston rod assembly is provided with a communicating oil way and an upper buffering oil way which always communicate with the rod cavity and the rodless cavity, a buffer cavity, a feedback oil way, a through hole and a stepped hole are formed in the piston, and a main valve core is mounted in the stepped hole; and the cylinder body assembly is composed of a cylinder cover, a cylinder and a cylinder head, wherein a buffer sleeve is installed in the cylinder cover. According to the constant-pressure buffer forklift lifting oil cylinder, when the piston rod assembly moves to the cylinder cover, the buffer sleeve seals an oil outlet in the rod cavity, hydraulic oil acts on the bottom of the main valve core through the feedback oil way on the piston to push the mainvalve core to move, and damping in the upper buffering process is controlled through the movement amount of the main valve core; and when the piston rod assembly moves to the position close to the cylinder head, a buffer plunger on the cylinder head is inserted into the piston buffer cavity, and the hydraulic oil flows out of a buffer gap formed by the buffer plunger and the buffer cavity.

    本发明涉及液压油缸,为解决叉车起升油缸上缓冲压力波动剧烈等问题。油缸由缸体组件和活塞杆组件组成,活塞杆组件由活塞杆和活塞组成,活塞把油缸内部空间分隔成有杆腔和无杆腔,活塞杆组件开设始终联通有杆腔和无杆腔的联通油路和上缓冲油路,活塞内开设缓冲腔、反馈油路、贯通孔、阶梯孔,阶梯孔中安装主阀芯;缸体组件由缸盖、筒和缸头组成,缸盖内安装缓冲套;活塞杆组件移至缸盖处时,缓冲套封闭有杆腔内的出油口,液压油通过活塞上的反馈油路作用在主阀芯底部,推动主阀芯移动,通过主阀芯移动量控制上缓冲过程中的阻尼大小;活塞杆组件移动至缸头附近时,缸头上的缓冲柱塞插入活塞缓冲腔内,液压油从缓冲柱塞与缓冲腔形成的缓冲间隙流出。


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    Titel :

    Constant-pressure buffer forklift lifting oil cylinder


    Weitere Titelangaben:

    恒压缓冲叉车起升油缸


    Beteiligte:
    LIU TONG (Autor:in) / KONG XIANGCI (Autor:in) / HE LINDAN (Autor:in)

    Erscheinungsdatum :

    2020-06-30


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    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 / F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein



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