Transmission shaft automatic connection and disengagement device and test equipment

A transmission shaft automatic connection and disengagement device, comprising an output shaft, a first connection shaft, a ratchet assembly, a second connection shaft and an input shaft, wherein

• an upper end of the output shaft is connected with a transmission shaft, and a lower end of the output shaft is of a gear structure;
• an upper end of the first connection shaft is of a gear structure, and the gear structure of the upper end of the first connection shaft can be engaged with the gear structure of the lower end of the output shaft;
• a lower end of the first connection shaft is connected with an upper end of the ratchet assembly through a spline, and an upper end of the second connection shaft is connected with a lower end of the ratchet assembly through a spline;
• the ratchet assembly can transfer rotation of the second connection shaft to the first connection shaft, and prevent rotation of the first connection shaft from being transferred to the second connection shaft;
• and
• a lower end of the second connection shaft is connected with the input shaft, and the input shaft is configured to input rotation power,
• wherein the ratchet assembly comprises a ratchet cover, a first baffle, a ratchet, a pawl, a first group of air cylinders and a second group of air cylinders;
• the first connection shaft penetrates through the first baffle, and the lower end of the first connection shaft is connected with the ratchet through a spline;
• the first connection shaft is provided with a first-connection-shaft shaft shoulder, a clamping hoop is fixed to the first connection shaft below the first-connection-shaft shaft shoulder, the first baffle is positioned between the first-connection-shaft shaft shoulder and the clamping hoop, and the first baffle can freely rotate around the first connection shaft;
• the first baffle and a top surface of the ratchet cover are fixedly connected together;
• the ratchet and the pawl are fixed in the ratchet cover, and a lower end of the ratchet cover is connected with the second connection shaft through a spline;
• and
• positions of the first group of air cylinders and the second group of air cylinders are fixed, the first group of air cylinders are positioned above the first baffle, the second group of air cylinders are positioned below the ratchet cover, piston rods of the first group of air cylinders can push the first baffle, and piston rods of the second group of air cylinders can push the ratchet cover.