Hook-headed wedge key locking device for transmission shaft of railroad hopper car

The invention discloses a railway hopper car transmission shaft hook-headed wedge key anti-loosening device, a transmission shaft is sleeved with a crank, a hook-headed wedge key is connected with the transmission shaft and a crank key, the railway hopper car transmission shaft hook-headed wedge key anti-loosening device comprises a pressing plate, the pressing plate comprises a first part and a second part, the second part is arranged at one end of the first part to form an L shape, a first through hole is formed in the first part, and a second through hole is formed in the second part; a first through hole is formed in the first part, an arc groove is formed in one side of the first through hole, the second part is connected with a hook head wedge key, the adjusting cushion block is columnar, a second through hole is formed in the adjusting cushion block, an arc face matched with the arc groove is arranged on one side of the adjusting cushion block, and a limiting part which cannot penetrate through the sec