Transmission mechanism

A transmission mechanism, comprising a planet carrier, a planet gear, a pin, a sliding bearing, and a plurality of thrust bearings, wherein

• the planet gear is rotatably disposed on the planet carrier through the pin, the thrust bearings are disposed between one end of the planet gear and the planet carrier, and between another end of the planet gear and the planet carrier, respectively, and a first lubrication gap is formed between each thrust bearing of the thrust bearings and an end surface of the planet gear;
• the sliding bearing is sleeved on the pin and is disposed between the planet gear and the pin;
• a second lubrication gap is formed between an inner circumference of the sliding bearing and the pin or between an outer circumference of the sliding bearing and the planet gear;
• oil channels are disposed on the pin, lubricating oil enters into the first lubrication gap and the second lubrication gap through the oil channels respectively;
• an oil discharge channel is disposed on the pin;
• a part of the lubricating oil entering into the first lubrication gap is configured to flow along the first lubrication gap to lubricate the thrust bearings and is configured to be discharged directly after lubricating the thrust bearings;
• other part of the lubricating oil entering into the second lubrication gap is configured to flow along the second lubrication gap to lubricate the sliding bearing and finally flow to the oil discharge channel to be discharged after lubricating the sliding bearing;
• and
• a first end of the oil discharge channel communicates with the second lubrication gap, and a second end of the oil discharge channel is configured to make the other part of the lubricating oil to be finally discharged from the inside of the pin without flowing through the first lubrication gap.