According to the ductility, the transmission shaft is classified according to its key component-the cross shaft is different. If there is significant ductility in the twisted orientation of the cross shaft, it can be divided into rigid shaft cross shaft drive shaft and flexible cross shaft drive shaft.

1. Stiffness cross shaft: hinged connection of parts to transmit driving force. 2. Flexing cross shaft: The driving force is transmitted by ductile parts, and it has the effect of buffering and damping. According to the angular velocity, the stiffness cross shaft can be divided into different speed universal joints (such as cross shaft cross shafts), quasi constant speed universal joints (such as double connected cross shafts, three shaft pin cross shafts) and constant speed universal Joints (such as ball cage cross shaft, ball fork cross shaft). Constant velocity and unequal velocity refer to whether the rotational angular velocity of the driven shaft is the same when the driven shaft rotates. Naturally, the average speed ratio of the driven shaft and the driven shaft is the same. 1. Constant velocity universal joint: The angular velocity of the main and driven shafts is still the same when the intersection angle between the two axes changes. It is called constant velocity universal joint or constant angular velocity cross axle. They are suitable for the transmission of wheels and gears in the drive and broken drives, and for the transmission of driving force in cars.

2. Unequal speed universal joint: the cross shaft whose angular velocity of the main shaft and the driven shaft are different when the intersection angle between the two shafts changes is called the unequal speed universal joint, also called the cross shaft type cross shaft. Cross shaft stiffness The cross shaft drive shaft is commonly used in the transmission system of the trolley and has a long history. When the car is front and rear drive, the cross shaft cross shaft drive shaft is often used. For some high-end cars, the constant velocity ball head is also used; when the car is driven by the front wheel, the constant velocity universal joint is often used- —The constant velocity universal joint is a kind of transmission shaft, just called it differently. Generally speaking, the transmission shaft generally refers to the cross shaft rigidity cross shaft transmission shaft. Cross shaft stiffness The cross shaft is suitable for the transformation of the transmission angle of view. It is generally composed of a flange fork, a cross shaft with a cylindrical roller bearing, a cross shaft fork or a drag fork, a center-joint fork or a spline shaft fork, and a cylindrical roller The radial fixed card of the bearing is constructed.

Flange fork is a fork-shaped part with a flange, generally forged parts of low carbon steel or medium carbon carbon steel, sand castings and low carbon steel or medium carbon high quality carbon steel of spheroidal graphite casting Precision castings. Flange forks are generally equipped with a flat flange, but also with a stepped tooth flange with an inner hole. The total range of the cross shaft with cylindrical roller bearings generally includes four cylindrical roller bearings, a cross shaft, and a grease nipple. Cylindrical roller bearings are generally composed of several needle rollers, a rolling bearing bowl, and a multi-tooth surface rubber oil seal (a part with a skeleton picture).

In some cylindrical roller bearings, there is an annular seal with oil groove, which is made of polyester. It is also made of metal sheet or other raw materials. It is suitable for reducing the radial clearance of the cross shaft and improving the dynamic balance quality of the drive shaft rotor. The cross shaft fork is a fork-shaped part. Generally, a forged part of low carbon steel or medium carbon carbon steel is used, and a precision casting part of low carbon steel is also selected. The radial fixed card of the cylindrical roller bearing is generally a ductile flat washer (inner and outer card type) for holes (or shafts), or rolling bearing pins, lock plates, anchor bolts, etc.