Zhejiang Waxing Electromechanical Co., Ltd is one of the most professional manufacturers and suppliers of automobile cross bearing universal joint 31*88mm in China. Welcome to buy high quality customized bearings made in China here from our factory. For price consultation, contact us.
Product Description
1.Universal joint bearing, is part of the power transfer to realize variable Angle, used to need to change the location of the drive axis direction.It is the universal transmission device of car driving system of the "joint" part.
2.Universal joint and combination of transmission, known as the universal joint transmission device. On the front engine rear wheel drive vehicles, universal transmission device installed in the gearbox output shaft and drive axle of the main reducer input shaft between; And front engine front-wheel drive vehicles omit the transmission shaft. 3.Universal joint is installed in the steering system is responsible for driving and responsible for between front axle and half axle and the wheel.
The failure of the transmission shaft universal joint is mainly due to the wear of the journal and bearing and the bending deformation of each journal, causing the center lines of the cross shafts to be not on the same plane, or the center lines of the two adjacent axes to be non-perpendicular. Due to the excessive wear gap between the universal joint cross shaft journal and the bearing, the cross shaft shakes during operation, causing the center line of the transmission shaft to deviate from its rotation center line, causing the transmission shaft to vibrate and the transmission shaft to make abnormal noises during operation. Phenomenon. Wear is mainly caused by lack of lubrication.
The wear of the universal joint cross shaft journal and bearing should not exceed 0.02~0.13mm based on usage conditions, and is generally maintained at around 0.01mm. If it exceeds 0.13mm, the transmission shaft will vibrate and make noise. If the cross shaft journal is worn and grooved, and the groove is very deep, it should be repaired or replaced. If surfacing and inserting repairs are used, heat treatment and grinding must be carried out. After processing, the out-of-roundness of each journal is required to be 0.01mm, and the taper cannot be large (the length of 20mm cannot be greater than 0.01mm). To check the perpendicularity of two adjacent axes, make sure they are perpendicular. After processing and repair, the axis of each journal should be in the same plane.
When the vehicle is running, since the torque transmission direction is the same, the force direction of the cross axis is also the same. Over time, the unilateral wear of the cross shaft journal is caused. As time goes by, the stressed side of the cross shaft will wear more, become grooved, and cause looseness and sound. You can rotate the cross axis 90° relative to the original position before use, which can extend the use time. When assembling, attention should be paid to the side with the oil nozzle facing the transmission shaft. The universal joint fork should rotate freely on the cross shaft, and there should be no jamming or axial clearance. Grease should be added frequently during daily maintenance to prevent wear of the cross shaft journal and bearings due to lack of grease.
The main reasons for the bottom of the cross-axis needle roller bearing bowl are: the U-bolts are over-tightened and exceed the specified torque; the U-bolt tightening method is improper (never tighten the nut on one end of the U-bolt first, and then tighten the other end) Nut) causes poor contact between the U-shaped bolt and the cross-shaft bearing bowl, causing partial stress and fragmentation. There is a small axial positioning boss of the cross shaft at the semicircular hole of the fork flange. When maintaining and repairing the cross shaft, if the bottom groove of the bearing bowl is mistaken for the positioning groove that restricts the rotation of the bearing bowl, the positioning boss on the fork will be stuck. In the bottom groove of the bearing bowl, the axial clearance of the cross shaft will increase by 3Inm (the normal fit is only allowed to be within a maximum of 0.20mln). Therefore, the axial movement of the cross shaft increases and is impacted by centrifugal force, causing the transmission shaft assembly to Loss of dynamic balance causes vibration, and the bearing steel bowl is also easily damaged. In addition, the needle bearings may be damaged early if the needles are missing, the pins are not issued, etc.
During regular maintenance, the technical condition of the cross shaft bearing should be checked frequently; during repair, avoid the small boss of the semicircular hole of the fork flange from getting stuck in the groove at the bottom of the bearing bowl (the groove on the end face of the bearing bowl has been eliminated in the current Dongfeng Motors); U-shaped bolts Tighten symmetrically to the specified torque and check frequently.
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