Outer clamping fixture

The invention discloses an outer clamping fixture. The outer clamping fixture comprises a support structure (1), and a first elastic piece (2); and the first elastic piece (2) is tightly connected with the support structure (1) in a mode of coating the support structure (1), so that the first elastic piece (2) can inwards expand in the radial direction under the effect of inflation and deflation devices. The outer clamping fixture is small in size, low in mass, simple in structure and low in production cost, can quickly and stably clamp such fragile and soft objects as columns and bottles withdifferent sizes and regular or irregular external shapes within a certain range, and cannot damage the clamped objects. 本申请公开了一种外夹式夹具。所述外夹式夹具包括支撑结构(1)；以及第一弹性件(2)，所述第一弹性件(2)以包覆所述支撑结构(1)的方式与所述支撑结构(1)密封连接，使得第一弹性件(2)能够在充放气装置的作用下沿径向向内膨胀。本申请的外夹式夹具体积小、质量轻，结构简单、造价低廉，可以在一定范围内迅速、稳定地夹取不同尺寸且外部形状规则或不规则的柱状、瓶状等易碎、柔软的物体，且不对被夹取物产生损伤。