Multifunctional wet axle of 5-to-10-ton forklift

The utility model relates to a multifunctional wet axle of a 5-to-10-ton forklift. A service brake of a drive axle is a wet brake, shell bodies on the inner sides of a left brake and a right brake are respectively provided with a first lubricant channel, the first lubricant channels on two sides are respectively communicated with one end of a right cooling oil pipe and one end of a left cooling oil pipe, and the other end of the right cooling oil pipe and the other end of the left cooling oil pipe are respectively connected with the first port and the second port of a three-way pipe. The bottom of a drive axle housing corresponding to a main reducer assembly is provided with a cooling oil outlet pipe. A hub body is provided with an oil drainage hole, a second lubricant channel, and a third lubricant channel. The third port of the three-way pipe and the cooling oil outlet pipe are respectively communicated with an outlet and an inlet of a lubricant pump. A forced circulation lubricant system is formed. Service life of the multifunctional wet axle is 3-5 times that of a common drum brake, and braking performance is not degraded even if the multifunctional wet axle is used over 3 years. Due to the forced circulation lubricant system, the difficult problems that the multifunctional wet axle shares a cooling mechanism with a lifting system so that the size of a hydraulic oil tank is large, and the number of cooling fans is increased so that power supply of an engine is in sufficient are avoided.