The invention discloses an improved variable-amplitude pulley block, and relates to the technical field of pulley blocks. The improved variable-amplitude pulley block comprises a mounting bracket, and two pulley blocks symmetrically connected to the mounting bracket; one end, far away from the two pulley blocks, of the mounting bracket is connected with an inhaul cable; each pulley block comprises a center shaft and three sliding wheels rotatably connected to the center shaft through bearings; three circular interlayers are symmetrically formed in the two sides of the mounting bracket; the two center shafts coaxially penetrate through the three circular interlayers; a limiting structure is matched with the circular interlayers and the sliding wheels to form a full-surrounding limiting effect on a steel wire rope, and a plurality of rotating blocks in the radial limiting structure have buffering and rolling extrusion limiting effects on fluctuation of the steel wire rope; and under the action of elastic force of an annular spring in the annular limiting structure, the plurality of rotating blocks clamp and limit the two sides of the steel wire rope wound on and extending out of the sliding wheels, so that fluctuation of the steel wire rope in the moving process is effectively restrained under protection of multiple buffering and limiting, and the service life of the steel wire rope is prolonged.
本发明公开了一种改进型变幅滑轮组,涉及滑轮组技术领域,包括安装支架和对称连接在安装支架上的两个滑轮组,所述安装支架上远离两个滑轮组一端连接有拉索,两个所述滑轮组均包括中心轴和通过轴承转动连接在中心轴上的三个滑动轮,所述安装支架两侧内均对称开设有三个圆形夹层,其中两个中心轴均同轴贯穿三个圆形夹层,在限位结构配合圆形夹层和滑动轮对钢丝绳形成全包围限位效果,径向限位结构中多个转动块对钢丝绳波动的缓冲和滚动挤压限位效果,环形限位结构中环形弹簧弹力作用下多个转动块对绕接并延伸出滑动轮上的钢丝绳两边形成的夹持限位效果,多重缓冲限位的保护下,有效抑制钢丝绳在运动过程中的波动,延长钢丝绳的使用寿命。
Improved variable-amplitude pulley block
一种改进型变幅滑轮组
2021-06-11
Patent
Electronic Resource
Chinese
European Patent Office | 2023
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