| 摘要 |
<p>Disclosed in the present invention is a dismountable expansion bolt,which comprises a screw rod (1), a reducer nut (6), a expansion thimble (5), a gasket (4), a spring-gasket (3) and a nut (2), wherein long threads and short threads are arranged on the screw rod (1); the little end of the reducer nut (6) is inserted into one end of the expansion thimble (5); and the outer diameter of the big end of the reducer nut (6) is greater than the inner diameter of the expansion thimble (5). On the basis of the reservation of the function, performance and usage of the old-fashioned expansion bolt, the dismountable expansion bolt is adjustable, exchangeable, removable and reusable, and also has the advantages of low carbon dioxide emission, resource saving, energy saving and environmental protection.</p> |
