Conveying roll structure with adjustable length

The invention relates to the field of machinery, and in particular relates to a conveying roll structure with adjustable length. The invention is achieved by the following technical scheme that the conveying roll structure with the adjustable length comprises a rotating shaft, a turn plate, a first support frame, a support shaft connected to the first support frame in a sleeving manner, a first ball bearing arranged between the first support frame and the support shaft, an adjusting lever connected into the support shaft in a sleeving manner and in threaded connection with the rotating shaft, a second ball bearing arranged between the adjusting lever and the rotating shaft, a third ball bearing that is arranged between the first support frame and the adjusting lever and provided with an inner ring fixedly connected to the adjusting lever, a spring arranged between the adjusting lever and the rotating shaft, a second support frame fixedly connected to the other end part of the rotating shaft, a first roll body fixedly connected to the first support frame in a sleeving manner, and a second roll body that is radially relatively fixed to the first roll body in an axial sliding manner and fixedly connected to the second roll body of the second support frame in a sleeving manner. According to the conveying roll structure with the adjustable length, applicability of the conveying roll can be effectively improved.