On the corners of cities and the roads in rural areas, tricycles, with their flexible and convenient features, undertake numerous short-distance transportation and travel tasks. The 206, 6-tooth bearing on the rear axle half shaft of tricycles is a vital core hub in this transportation system. Although it is often overlooked, it plays a decisive role in the normal operation of tricycles.

Lao Zhang runs a small grocery store, and his freight tricycle is his capable assistant for daily restocking and delivery. One day, Lao Zhang, as usual, loaded all kinds of goods onto the tricycle and was ready to go to the warehouse a few kilometers away to pick up goods. However, when he started the tricycle, he found that the vehicle was abnormal. There was a dull “clicking” sound coming from the rear wheels, and the vehicle’s power was obviously insufficient, and the acceleration was extremely slow. Even when he turned the throttle to the maximum, the tricycle could only move with great difficulty.

Lao Zhang’s heart sank. He realized that the vehicle might have encountered a rather serious malfunction. Based on his years of experience, he guessed that the problem might lie in the rear axle part of the tricycle. So, he carefully drove the vehicle to the nearby repair shop. After receiving the vehicle, Master Wang, the repairman, first conducted a preliminary inspection of the vehicle and then focused on the rear axle half shaft. After careful investigation, it was found that the 206, 6-tooth bearing had a serious malfunction.

Master Wang took out the half shaft from the rear axle and carefully examined the 206, 6-tooth bearing. He saw that the 6-tooth part of the bearing had serious wear, and the tooth surfaces became rough and uneven. Some of the teeth were even broken or missing. Meanwhile, the balls, the inner ring and the outer ring of the bearing also had different degrees of damage. The surfaces of the balls were covered with scratches, and the inner ring and the outer ring showed signs of deformation and wear. This was caused by long-term heavy-load transportation, as well as frequent starting, braking and road bumps, which made the bearing work continuously under high load and complex forces, and finally led to serious damage.

Master Wang explained to Lao Zhang, “Boss Zhang, this 206, 6-tooth bearing is not simple. It not only has to bear the rotating support force of the half shaft but also needs to precisely cooperate with other transmission components through these 6 teeth to stably transmit power to the rear wheels, thus driving the vehicle forward. Once there is a problem with it, the power transmission will be blocked, and the vehicle will naturally not be able to run normally.”

Subsequently, Master Wang replaced the 206, 6-tooth bearing with a brand-new one for Lao Zhang and also inspected and adjusted the relevant transmission components. During the replacement process, Master Wang also reminded Lao Zhang, “When you use the tricycle in the future, try to avoid overloading, rapid acceleration and sudden braking as much as possible, and regularly check the lubrication conditions of the transmission components and bearings of the vehicle. This can effectively extend the service life of the bearings and reduce the occurrence of malfunctions.”

After replacing the bearing, Lao Zhang started the tricycle again. The disturbing “clicking” sound disappeared, the vehicle’s power was restored to its original state, and the acceleration was smooth and powerful. Lao Zhang said gratefully to Master Wang, “Master Wang, thank you so much! Your skills are really excellent. If it weren’t for you, my business would be affected.” Master Wang smiled and said, “Boss Zhang, you’re welcome. It’s all what I should do.”

In another scenario, Xiao Li, a courier, also encountered a similar problem with his electric tricycle for delivering parcels. During the process of delivering parcels, he suddenly felt that the vehicle was difficult to drive, and there was an abnormal sound from the rear wheels. After sending the vehicle to the repair station, the maintenance personnel checked and found that the 206, 6-tooth bearing was damaged. After the timely repair and replacement by the maintenance personnel, Xiao Li’s delivery tricycle could shuttle efficiently through the streets and alleys again and deliver parcels to customers accurately.

As a key component of the tricycle drive system, the 206, 6-tooth bearing on the rear axle half shaft of tricycles silently undertakes huge pressure and responsibility. Whether it’s a commercial freight tricycle or an electric tricycle for delivering parcels, it guarantees the stable operation and power transmission of the vehicle behind the scenes. Therefore, we must attach importance to the maintenance of this component to ensure that tricycles can continuously and reliably serve our life and work.