Oil groove structure for improving transmission gear lubrication and gearbox shell

The utility model discloses an oil groove structure for improving transmission gear lubrication and a gearbox shell, which belong to the technical field of transmissions and comprise a flow guide device, a plurality of oil duct holes, an oil containing groove and an oil through hole. A plurality of oil duct holes are formed in the junction surface of the main gearbox shell and the auxiliary gearbox shell, so that lubricating oil splashed by a gear at the rear end of the transmission is smoothly splashed into the main gearbox shell at the front end of the transmission in the process that a vehicle climbs a slope, and the lubricating oil is discharged out of the main gearbox shell under the action of a flow guide device, an oil containing groove and an oil through hole. Lubricating oil is introduced to the reverse gear intermediate shaft and the gear and the gear shaft at the front end of the transmission, so that the reverse gear intermediate shaft and the gear at the front end of the transmission are fully lu