Three-in-one assembled guide rail structure

A three-in-one assembled guide rail structure, comprising a guide rail body, the guide rail body comprising a connecting member for fixing a mounting hole of a cabinet, an end surface of the connecting member corresponding to the mounting hole being provided with a support bracket, the support bracket comprising a first connecting surface and a second connecting surface, the first connecting surface and the second connecting surface combining to form an integral structure by two parallel connecting plates, the first connecting surface and the second connecting surface being arranged in parallel, a mounting cavity being formed between the first connecting surface and the second connecting surface, the first connecting surface and the second connecting surface being in parallel to an end surface arrangement provided with the mounting hole of the cabinet, the first connecting surface fitting to the end surface arrangement provided with the mounting hole of the cabinet, the second connecting surface being provided with two connecting thread holes, a corresponding location of the connecting thread hole corresponding to the first connecting surface being provided with a corresponding first circular hole, each group of the corresponding connecting thread hole and the first circular hole being fitted and provided with a stud, a guide spring and a first thread insert, an inner end of the stud being provided with a threaded section, a terminal segment of the threaded section being provided with a first stop structure, a remaining segment of the stud being a smooth surface structure, an outer end surface of the stud being provided with an inner groove for screwing or unscrewing a corresponding model of screwdriver, the first thread insert comprising a central through hole, an inner end second stop structure, a middle segment circular guide ring and an outer end circular guide ring, a diameter of the middle segment circular guide ring being greater than that of the outer end circular guide ring, a region of the inner end second stop structure being larger than that of the middle segment circular guide ring, a region of the first circular hole being smaller than that of the inner end second stop structure, a diameter of the first circular hole being not less than that of the middle segment circular guide ring, the guide spring being sleeved at a location of the stud between the mounting cavities, the first thread insert being sleeved on the stud, the second stop structure of the first thread insert being positioned in the mounting cavity, and two ends of the guide spring being respectively top mounted on the first stop structure and the second stop structure, and the threaded section of the stud being in threaded connection to the corresponding connecting thread hole.