Torque transmission device

The utility model belongs to the technical field of torque transmission, and discloses a torque transmission device, which comprises a straight sleeve, a bent sleeve, a transmission shaft and a flexible shaft, the transmission shaft rotatably penetrates through the straight sleeve, the flexible shaft rotatably penetrates through the bent sleeve, and the bent sleeve comprises a first pipe section and a second pipe section. The straight sleeve is sleeved with the first pipe section, the first pipe section can rotate relative to the straight sleeve, the center line of the first pipe section coincides with the center line of the straight sleeve, and an included angle is formed between the center line of the second pipe section and the center line of the first pipe section; one end of the flexible shaft is connected with the transmission shaft, the end, away from the flexible shaft, of the transmission shaft is used for torque input, and the end, away from the transmission shaft, of the flexible shaft is used for