What is the role of the car axle?
Intermediate shaft, is a shaft in the automobile gearbox, the shaft itself and the gear as one, the role is to connect one shaft and two shafts, through the change of the shift rod to select and engage with different gears, so that the two shafts can output different speeds, steering and torque. Because it is shaped like a tower, it is also called "pagoda teeth".
The car engine is the engine that provides power for the car and is the heart of the car, affecting the power, economy and environmental protection of the car. According to different power sources, car engines can be divided into diesel engines, gasoline engines, electric vehicle motors and hybrid power. Common gasoline engines and diesel engines are reciprocating piston internal combustion engines, which convert the chemical energy of the fuel into the mechanical energy of the piston movement and output power. Gasoline engine has the advantages of high speed, low quality, low noise, easy starting and low manufacturing cost; Diesel engine has high compression ratio, high thermal efficiency, better economic performance and emission performance than gasoline engine.
With the increase of the service life of the intermediate shaft, its natural frequency has decreased, and the decline is small. The natural frequency of the intermediate shaft decreased by 1.2% at the highest, and the decline of the first 4 natural frequencies was higher than that of the low ones, but the change of the decline rate was irregular. The surface hardness of different sections changes slightly, and there is a trend of rising first and then decreasing. According to the changes in the natural frequency and hardness of the intermediate shaft, it can be preliminarily inferred that the intermediate shaft has more than 60% of the remaining life, and has recycling value.
What are the symptoms of car intermediate shaft damage
Abnormal sounds and vibrations
Symptoms of broken intermediate shafts include abnormal ringing and vibration. When the intermediate shaft of the car has a problem, the common manifestations are:
Abnormal sound: In the process of starting or driving the car, if the drive shaft continues to emit abnormal sound and accompanied by vibration, this may be due to the loosening of the fixing bolt of the middle support. In addition, if the car is driving at a low speed when the transmission shaft comes from a crisp and rhythmic metal crash, especially when the sound is particularly clear when sliding out of gear, this may also be a problem with the transmission shaft.
Vibration: When reversing on a gentle slope, if you hear intermittent sounds, it is likely because the needle roller is broken or damaged, and the needle roller bearing should be replaced at this time.
These symptoms indicate that there may be a problem with the intermediate shaft, which needs to be checked and repaired in time.
Car middle axle abnormal sound
The causes and solutions of abnormal sound of automobile intermediate shaft mainly include the following points:
Insufficient lubrication: If the abnormal sound of the automobile intermediate shaft is caused by insufficient lubrication, the solution is to lubricate the intermediate shaft. For example, in the Toyota Highland, if you hear an intermittent "sizzle" abnormal sound coming from below the steering disc, it may be because the amount of grease in the dust cover of the steering intermediate shaft is insufficient, and the sealing ring is dry, resulting in friction between the plastic and the intermediate shaft. At this time, the steering intermediate shaft should be lubricated with the specified grease, and care should be taken to avoid the reverse of the dust cover seal or the rubber ring falling off.
Parts damaged or loose: If the abnormal sound is caused by parts damaged or loose, such as bearing wear loose or lack of oil, should add enough lubricating oil or replace the bearing. Abnormal noises when the vehicle starts, such as "clanging" or cluttered sounds, may be because the roller needle is broken, broken or lost and needs to be replaced with a new part.
Improper installation: If the abnormal sound is caused by improper installation, such as the bending of the drive shaft or the depression of the shaft tube, or the loss of the balance sheet on the drive shaft, resulting in the loss of the balance of the drive shaft, it should be repaired or replaced. Especially when the accelerator pedal is lifted and the speed suddenly drops, if the swing vibration is large, it indicates that the flange and shaft tube welding is skewed or the drive shaft is bent, and the technical status of the universal joint fork and the intermediate shaft support needs to be checked.
Bearing problems: There are a variety of reasons for bearing ringing, including oil impurities, insufficient lubrication, improper bearing clearance and so on. Fixing these problems may require replacing bearings, cleaning bearings, adjusting clearance, or improving lubrication conditions.
Other factors: Abnormal sound of the drive shaft may also be caused by loose transmission shaft flange joints or connecting bolts, grease nozzle blockage, cross shaft oil seal damage and other reasons. Solutions include tightening the connection bolts, cleaning the grease nozzle, replacing the damaged oil seal, etc.
In summary, to solve the problem of abnormal sound of the automobile intermediate shaft, corresponding measures need to be taken according to the specific reasons, including lubrication, replacement of damaged parts, adjustment of installation status and improvement of lubrication conditions. When dealing with such problems, it is recommended to contact professional maintenance personnel for diagnosis and repair to ensure safety and effectiveness.
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