Universal joint with long service life

The invention relates to the field of automobile parts, in particular to a long-life universal joint. Comprising a cross shaft, a framework, an oil seal, a roller pin and a shaft sleeve, the cross shaft comprises a middle blank and a shaft neck, the end of the shaft neck is sleeved with the shaft sleeve, the roller pin is arranged between the shaft sleeve and the shaft neck, the oil seal and the framework are arranged at the bottom of the shaft neck and located between the shaft sleeve and the shaft neck, and an oil storage space is formed by the oil seal, the framework, the roller pin, the side wall of the shaft sleeve and the side wall of the shaft neck. An annular grease storage groove is formed in the end of the shaft neck, the shaft neck is provided with a first grease guide channel, the first grease guide channel is communicated with the side wall of the grease storage groove and a side face grease guide groove, the shaft neck is further provided with a second grease guide channel, the second grease gui