a back bolt
A technology of back bolts and sleeves, applied in the direction of connecting components, pins, covering/lining, etc., can solve problems such as inability to install in place, slippage, deformation, etc., and achieve the effect of improving production efficiency and preventing false expansion
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[0036] In order to further explain the technical means and functions adopted by the present invention to achieve the intended invention purpose, the structure, features and functions of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.
[0037] The back bolt described in the present invention has a structure such as figure 1 , figure 2 As shown, it specifically includes the anchor rod 4, the expansion sleeve 2, and the sleeve 1 that pushes the expansion sleeve 2. The upper part of the anchor rod 4 is provided with a receiving section 4-1, the receiving section 4-1 is provided with external threads, and the lower end is provided with a cone. Section 4-4, a connecting section 4-2 is set between the receiving section 4-1 of the anchor rod 4 and the cone section 4-4, and several strip ribs 4-3 are arranged on the outer circumference of the connecting section 4-2. The rib 4-3 is arranged along the axia...
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