还要看 发表于 2012-8-22 13:38:16

折叠伞骨都考虑了咋不顺着考虑一下折叠伞架,有一种千斤顶就是支架结构的

wxpwu 发表于 2012-8-22 19:42:38

用液压的,早有了这种东西

ygxjhnld 发表于 2012-8-22 20:12:12

这个我也有遇到,但要看楼主具体要怎么做,可以用两三段丝杆接在一起可以缩很短又可以伸出很长,还有可以用连杆的那种千斤顶,
其实还蛮多的,要看楼主了。。。

taxiangguoke 发表于 2012-8-22 21:29:24

难就难在尺寸太小,期待问题的解决。

伯兮 发表于 2018-12-9 20:37:35

ygxjhnld 发表于 2012-8-22 20:12
这个我也有遇到,但要看楼主具体要怎么做,可以用两三段丝杆接在一起可以缩很短又可以伸出很长,还有可以用 ...

请问怎么用两三段丝杆接在一起可以缩很短又可以伸出很长

navy1866 发表于 2018-12-12 15:13:35

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用气缸(螺杆处)带动前端部分(最细段),中间一段靠前端拉出或带回。两段腔体内可加弹簧缓冲。
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