本标准适用于鞍式牵引车与半挂车之间机械联结的牵引座及牵引座安装板。1 术语及定义1·1 牵引座用以承受半挂车前部载荷,通过锁止机构与半挂车牵引销联结,传递牵引力和制动力,并能自动完成联结半挂车牵引销的装置。1·1·1 单自由度牵引座 This standard applies to the saddle tractor and semi-trailer mechanical coupling between the traction seat and traction seat mounting plate. 1 Terms and Definitions 1.1 Traction seat to withstand the front load of the semi-trailer, locking mechanism and the semi-trailer traction pin coupling, transfer traction and braking force, and can automatically complete the semi-trailer traction pin pin device. 1.1.1 single degree of freedom traction seat