Screwing sleeve, automatic aligning sleeve, wrench assembly and operation vehicle for track maintenance

The invention provides a screwing sleeve, an automatic aligning sleeve, a wrench assembly and an operation vehicle for track maintenance. The screwing sleeve includes: a torque input end; the sleeve main body is connected with the torque input end; the sleeve main body is provided with a sleeve inner cavity, and the sleeve inner cavity comprises a port, a bottom wall and a side wall with an inner polygon shape; the push piece is arranged in the inner cavity of the sleeve; the stop piece is arranged at the port; wherein an elastic component is arranged between the push piece and the bottom wall, the elastic component tends to push the push piece to the port, and the stop piece interferes with the push piece to prevent the push piece from being separated from the inner cavity of the sleeve. According to the device provided by the embodiment of the invention, the nut or the bolt head can be prevented from falling into the screwing sleeve and being difficult to take out, so that rail installation or maintenance i