A connector, at least comprising: a socket , comprising a connection end , wherein a slot , which extends along a length direction of the socket from an end surface of the connection end , is provided on the socket ; a bolt , comprising a bolt main body that is adapted to the slot , wherein a front end of the bolt main body is provided with at least two expansion arms , and the bolt main body is internally provided with an expansion channel which traverses the bolt main body along a length direction; and an expansion bolt , the expansion bolt comprising an expansion bolt main body that matches the expansion channel , wherein a front end of the expansion bolt main body is provided with an acting end that interacts with the expansion arms , and the socket and the bolt are tightly connected by means of an expansion force that is generated by the acting end opening the expansion arms ; each expansion arm is provided with clamping teeth on surfaces corresponding to the inner walls of the slot , the side walls of the slot are provided with limiting teeth corresponding to the clamping teeth , and the clamping teeth are meshed with the limiting teeth in a connected state, characterized in that an end part of the acting end is provided with a first limiting block , and a side surface of the first limiting block away from the acting end is provided with a chamfer, wherein the connector is configured so that, after the installation is completed, the first limiting block passes through the expansion channel and abuts against the expansion arm , so as to prevent the expansion bolt from retreating from the expansion channel to improve the reliability of connection. a socket , comprising a connection end , wherein a slot , which extends along a length direction of the socket from an end surface of the connection end , is provided on the socket ; a bolt , comprising a bolt main body that is adapted to the slot , wherein a front end of the bolt main body is provided with at least two expansion arms , and the bolt main body is internally provided with an expansion channel which traverses the bolt main body along a length direction; and an expansion bolt , the expansion bolt comprising an expansion bolt main body that matches the expansion channel , wherein a front end of the expansion bolt main body is provided with an acting end that interacts with the expansion arms , and the socket and the bolt are tightly connected by means of an expansion force that is generated by the acting end opening the expansion arms ; each expansion arm is provided with clamping teeth on surfaces corresponding to the inner walls of the slot , the side walls of the slot are provided with limiting teeth corresponding to the clamping teeth , and the clamping teeth are meshed with the limiting teeth in a connected state, characterized in that an end part of the acting end is provided with a first limiting block , and a side surface of the first limiting block away from the acting end is provided with a chamfer, wherein the connector is configured so that, after the installation is completed, the first limiting block passes through the expansion channel and abuts against the expansion arm , so as to prevent the expansion bolt from retreating from the expansion channel to improve the reliability of connection. <EOS>