How to distinguish the quality of roller skate bearings

Normally you should do:

Never pass over grass or mud as this will cause gravel to wear down the wheels of your skates, and sand will run into the bearings and need to be cleaned frequently.

Try not to roller skate on rainy days, as water can rust the bearings.

If the bearing is rusty, you must buy a small bottle of lubricating oil (gasoline, engine oil is also available), 200 ml is enough. Put the bearing in and soak it for three or four days to remove the rust.

When the time comes, you should take care of your shoes.

Maintenance of wheels.

The wheel will gradually wear out with the increase of use time, so the most important thing in the maintenance of wheel shoes is the inspection of the wheel, it is best to check the wheel once a week to see the degree of wear and tear of the wheel, if the wheel has a certain side of the wear is more serious, you must change the position earlier, otherwise the wheel may break, in addition, you must wipe off the dirt on the bearing with a cloth, check whether there will be a strange sound between the bearing washer and the bearing and the rotating shaft, and turn each wheel at the same time to see if it can roll normally, Also pay attention to whether the axis of rotation is bent. (Since these parts often wear out, it's a good idea to have a backup set at all times.) ）

The secret of wheel replacement.

1.Number the wheels first and mark them.

2.When changing wheels, it is recommended that you swap the No. 1 wheel on your left foot with the No. 3 wheel on your right foot, and it is best to rotate (reverse) the inside and outside of the wheel. According to this rule, the No. 2 wheel on the left foot and the No. 4 wheel on the right foot are swapped, then the No. 3 wheel on the left foot and the No. 1 wheel on the right foot are swapped, and finally, the No. 4 wheel on the left foot and the No. 2 wheel on the right foot are swapped.

Special attention is paid to the action of changing wheels only once every half a month to a month.

Adjustment of the wheel height.

Some models of wheel shoes, when the wheels are installed on the base, a part called an adjustment pad is required, and we can adjust the height of the wheels according to the needs of various sports.

Cleaning of bearings.

If the bearing is contaminated with dust, it can be cleaned with a dry cloth or toothbrush. If you want it to turn more smoothly, you can use a special maintenance oil.

Replacement of bearings.

Remove the bearing with a three-pronged screwdriver and wipe it with a dry cloth, please note! When putting the bearing back on, do not lock the screws too tightly.

Cleaning of the lining.

In addition to hard hats, pads such as knee pads and elbow pads are not only easy to absorb sweat, but also more likely to get dirt when falling, so they quickly become smelly and dirty, so they must be cleaned every once in a while.

Cleaning steps for the lining.

Step 1: Place the liner in the laundry tub and add warm water.

Step 2: Add a detergent that is designed for soaking and does not need to be rinsed.

Step 3: Soak for one night, take it out the next day, and leave it in the shade to dry.

Remember to use lukewarm water, if you soak it in cold or hot water, it will cause the liner to break. ）

Replace the brake pads.

The braking device on the heel of the shoe will wear out quickly if it is used regularly, and once it is severely worn, it is easy to lose balance when stepping on the brakes, and it may also cause the brakes to fail, so the brake pads must be replaced immediately after they are smoothed.

The easiest way is to take it and grind it twice on the steps, if it is ***, there are no traces on the shaft, if it is a fake and shoddy product, there are traces.

If you look at whether the pulley is tight, it is a fake product.

Wheel bearing bad performance: when one of the four wheel bearings of the vehicle is damaged, the car will hear a continuous buzz-buzz-buzz sound in the car, this sound can not tell where it comes from, it feels like the whole compartment is full of this buzzing sound, and the faster the speed, the louder the sound, the general speed can be heard from about 60km h when you can hear a slight buzzing sound, the speed of km h is obvious, 100km h when the car talks to raise the voice, at this time the soles of the feet have a fine vibration feeling. These are just the surface phenomena of the failure, if it is the first time to encounter it and really can't figure out what is going on, let's talk about the method of judging that the wheel bearing is broken.

Judgment method: Don't panic when you hear this buzzing sound during driving, keep calm and continue driving, and use these several methods to roughly judge the source of the sound.

1. Open the window and listen to whether the sound is coming from outside the car;

2. After increasing the speed of the vehicle (when the hum is loud), the gear position is in neutral gear to let the vehicle slide, observe whether the noise comes from the engine, if the buzzing sound does not change when coasting in neutral, it is most likely that there is a problem with the wheel bearing;

3. Temporary stop, get out of the car to check whether the temperature of the wheel axle is normal, the method is: touch the four wheels with your hands, and roughly feel whether their temperature is consistent (when the brake shoes and blade clearance are normal, there is a gap between the temperature of the front and rear wheels, and the front wheels should be higher), if you feel that the difference is not large, you can continue to drive slowly to the maintenance station;

4. Use the elevator to lift the car (before releasing the handbrake and hanging neutral gear), when there is no elevator, you can use the jack to lift the wheels one by one, and the manpower quickly rotates the four wheels respectively, when encountering the problematic axle, it will make a sound, which is completely different from other axles, and it is easy to distinguish which axle has a problem with this method. When there are accessories, you can directly replace the parts to eliminate the fault, if there are no accessories, what should I do? Then you have to drive with illness

The method of judging that the wheel bearing is broken: support the front wheel, rotate the front wheel by hand, and you will hear an abnormal sound; If the bearing is in use, it can be judged by the flexibility of rotation and the sound it makes when it rotates.

Raise up the wheel and listen carefully, this is the only way. No one will remove the bearing for you to check, because it is not easy to dismantle, it is not good to dismantle, and a good bearing can also be dismantled. Let's run more, and then get it when the fault is obvious. Hope.

Wheel bearings are an important part of automobile wheels. The main function of the wheel bearing is to bear the load and provide precise guidance for the rotation of the hub. It is subjected to both axial and radial loads.

Once a car breaks down, there are various breakdowns. Let's take a look at the symptoms of a broken wheel bearing, and how to determine the inspection method for a broken wheel bearing.

What are the symptoms of a broken wheel bearing? What is the sound of a wheel bearing breaking? The front wheel bearings of the wheels are on the front wheels of the car.

If the front wheel bearing of the wheel is damaged, and it is not very serious, then the noise will be loud after driving, and the broken wheel bearing will make a buzzing sound, unlike tire noise. You can drive for half an hour. After getting out of the car, gently touch the hub part of the bearing with the back of your hand.

If the bearing is damaged, the heat generated will be high and it is estimated to be very hot. It is different from room temperature, and if it is decisive, replace it. If the damage is severe, the heat will be generated faster, which can deform your axle and end caps.

This can't be sloppy. Change the speed. Go to the auto parts city to buy one and find the maintenance department to replace it.

Because 4S stores will be expensive and unnecessary.

If you hear a noise coming from the wheel bearing while driving, it is important to find out where the noise is occurring. There are many moving parts that can cause noise, and it is possible that some rotating parts have come into contact with non-rotating parts. If it is confirmed that it is a noise in the bearing, the wheel bearing is damaged and needs to be replaced immediately.

The first symptom of wheel damage is that the wheels shake when the car is moving, and the whole vehicle shakes even more. The second is that the bearing is damaged, and there will be abnormal noise. Thirdly, poor rolling leads to a drop in power. The biggest impact is the increase in body shaking and unusual noises. Replacement is recommended.

What are the symptoms of a broken wheel bearing? How can you tell if a wheel bearing is broken? 1.

Open the windows and listen for the sound to see if it's coming from outside. 2.When you increase your speed (when there is a loud buzz), shift the gear to neutral and let the vehicle coast and see if the noise is coming from the engine.

If the hum doesn't change when you slide into neutral, it's likely a wheel bearing problem; 3.Stop for a while and get out of the car to check if the axle temperature is normal. Method:

Touch the four hubs with your hands and roughly feel if they are at the same temperature (when the gap between the brake shoes and brake pads is normal, there is a gap in the temperature of the front and rear wheels, and the front wheels should be higher). If the difference is not significant, you can continue to drive slowly to the pit. 4.

Use the elevator to lift the car (release the handbrake and hang neutral in front). When there is no elevator, the wheels can be lifted one by one with a jack, and the four wheels are quickly rotated by manpower. When you encounter a faulty axle, it makes a sound, which is completely different from other axles.

With this method, you can easily tell which axle is in trouble.

How to tell if the bearing is broken:

1. The bearing is damaged. Inspect the balls of the ball bearings or the bearings of the ball bearings for damage. If damaged, it should be repaired or replaced.

2. The lubricating oil has impurities, is too dirty, the oil ring is stuck or the grade is wrong. The oil should be changed, the cause of the jamming should be found out for repair, and the lubricating oil should be changed when the oil viscosity is too large.

3. There is a lack of oil in the bearing room. Grease should be added to fill the 2 3 oil chamber or add lubricating oil to the standard oil surface line.

4. There is too much grease blockage in the rolling bearing, and the temperature of the lubricating oil in the overall eccentric bearing is too low or too high. Excess grease should be removed from the rolling bearing, or the grease in the oil chamber should be filled to 2 3.

5. The bearing and the shaft, the bearing and the end cover are too loose or too tight, too tight will deform the overall eccentric bearing, and too loose is easy to cause "running sleeve". When the bearing and the shaft fit too loosely, the journal can be coated with metallic paint, and reprocessed when it is too tight; The bearing and the end cover fit too loosely to set the end cover, and reprocess it when it is too tight.

First, the nature is different.

1. Pulley: a simple machine used to lift heavy objects and save effort.

2. Wheel axle: a system composed of "wheel" and "shaft" group. The system can rotate around the coaxial line, which is equivalent to a lever system with the pivot as the fulcrum and the radius as the rod.

Second, the principle is different.

1. a wheel axle. The essence of the axle is that the lever can be turned continuously. When using axles, the forces acting on the wheels and acting on the axles are usually tangent to the wheels and axles, so their arms are the corresponding radius of the wheels and axles.

2. a pulley. When in use, the position of the pulley is fixed; The fixed pulley is basically an equal-arm lever, which is labor-saving and labor-intensive, but can change the direction of the force. The power arm and resistance arm of the lever are the radius of the pulley, respectively.

Since the radius is equal, the power arm is equal to the resistance arm, and the lever is neither labor-saving nor labor-intensive.

An axle is a round wheel with a central shaft in the middle. The axle is equivalent to a labor-saving lever in order to save labor (the principle is that the labor-saving lever is slow).

A pulley is a whole system of a rope that is wrapped around a round wheel, called a pulley. And pulleys are divided into two kinds of rolling and buried molded pulley liquid spring.

It is to change the direction of action (the principle is an equal-arm lever) to move the pulley.

It is for the sake of labor-saving (the principle is labor-saving leverage).