拖拉机连续螺栓的装配方法正确与否,直接关系到使用寿命和安全行驶。致使连接螺栓时常松动或脱落的常见原因有以下几方面。1.扭力过大或过小没有用专用的扭力扳手紧固螺栓,因而达不到规定的扭力强度;或因用过大的扭力来紧固螺栓,而造成螺丝扣滑扣。在这种情况下,拖拉机一旦紧急制动或经过凹凸路面受到较大的震动时,螺栓便会松动或脱落。2.粗牙螺纹螺栓代替细牙螺纹螺栓细牙螺纹螺栓内径较大,螺距和外角较小,具有较高的强度,自锁性能良好,适用于承受较大的冲击、震动和变载荷的连接;而粗牙螺纹螺栓不具备上述优点。如传动轴连接螺栓改用粗牙螺纹螺栓后便会 Tractor continuous bolt assembly method is correct or not, is directly related to the service life and safe driving. Common causes of loose bolts or loose bolts are the following aspects. 1. Torque is too large or too small No special torque wrench to tighten the bolt, which can not reach the required torque strength; or because of the use of excessive torque to tighten the bolt, causing the screw buckle. In this case, the bolt will loosen or fall off once the tractor has been subjected to an emergency brake or a large shock on the rough road. 2. Coarse thread thread instead of fine thread thread bolt Fine thread thread bolt has larger diameter, smaller pitch and outer angle, higher strength and good self-locking performance, suitable for bearing large impact, vibration and variable load connection ; And coarse thread bolt does not have the above advantages. If the drive shaft connecting bolts instead of coarse thread bolts will be