is an active seat belt safety equipment on a vehicle. China’s “Road Traffic Safety Law” Article 51 states: motor vehicle, the driver and the passengers should be specified by the use of seat belts, motorcycle drivers and passengers should wear safety helmets regulations.
1. belt Glossary
is an active seat belt safety equipment on a vehicle. China’s “Road Traffic Safety Law” Article 51 states: motor vehicle, the driver and the passengers should be specified by the use of seat belts, motorcycle drivers and passengers should wear safety helmets regulations.
Currently, the standard form of seat belts in the world is three-point seat belt Nils invention, this car seat belts begin accepted today began in 1967, Daniels in the United States issued a “28,000 accident report”, which recorded 1966 in Sweden all involving Volvo cars traffic accident figures clearly show that the three-point seat belts, not only in more than half of cases, reduce or even avoid the chance passengers were injured, and more It can save their lives.
2. The principle of seat belts
three-point seat belts on the car is very important active safety device that principle is to detect the acceleration of the webbing pulled out to lock the webbing. If the acceleration of the webbing pulled out is too high, too fast revolution of the spindle so that the acceleration detector is greater than the centrifugal force experienced by the tension spring on the tenon, the tenon being thrown at this time, so that the shaft can not continue to be the webbing death card withdrawn. On the contrary, as long as the ribbon relax, tenons will be back to the spring, the shaft will be released, seat belts will be relaxed.
3. Tightening belts of noun
tightening belts (PRETENSIONER SEAT BELT), also known as seat belt pre-shrinking. This belt is characterized by the moment when car crashes occur when the occupant moves forward yet it would first tighten ribbon,The crew immediately tightly tied to the chair, and then lock the webbing to prevent the occupant’s body leaning forward, effectively protect the safety of occupants. Tightening belts play a major role in the normal seat belt retractor with different functions in addition to ordinary retractable webbing retractor further includes a vehicle speed when an abrupt change occurs, can enhance occupant restraint in about 0.1 seconds force, it means there is a control and pre-tensioning device. .
over the safety belt 4 acting
over the belt role in the process: first, tightened in time, at the first time of the accident people hesitate to “press” on the seat. Then, appropriate to relax until the peak impact of the past, or who have been able to be protected by an air bag, seat belt that is appropriate to relax. Avoid pulling too large to make a rib injury. Are presented with the most advanced safety belt force limiters and pre-tensioners, let’s look at the functional principle of the two.
seatbelt pretensioner when an accident occurs, the forward person, the seat back, if the belt is too loose at this time is probably the consequence: the occupant from the seat belt spool out the following: or, people have encountered airbags, seat belts due to the tension at a time when more than excessive and failed to tighten, which failed to advance as hoped eaten part of momentum, but all the burden are handed over to the air bag. Both cases are likely to lead to serious occupant injury. But the problem is properly installed seat belts. Loosening room come from? First, because the occupant’s clothes itself has a certain thickness, in addition to the seat belt device is also much room to hide some of the loose, this room can not be eliminated, but really an accident, you should also try to eliminate . How do? For this reason there was thisKind of seat belt pretensioner which is responsible for providing instant taut seat belt. Its role in the process are: a first probe responsible for collecting information on crash, and then releases an electrical pulse that is transmitted to the gas generator, the gas detonation. Rapid expansion of a gas explosion in the pipe, is pressed against the so-called ball chain, the ball forward in the blow tube, turn drives the pawl plate. Uranium pawl is integral with the plate, around the belts to the shaft. Simply put, the gas pressure to move the ball, the ball detent disc rotation drive, the disk drive pawl shaft revolution – the pretensioner function effected instantaneously belt. From the perception accident seat belt pretensioner to complete the whole process lasts only thousandths of a second. End of the pipe length is a cavity for a ball roll over shelter.
5. Tightening belts Notes
● tightening belts can not be used again after startup. It must be replaced together with the retractor and buckle.
● If the car is subjected to impact, but the pre-tensioner does not start, make sure to check specialty stores pre-tensioner system, if necessary, replace.
● not make any unauthorized changes to any part of the line or the seat belt pretension systems, this is to prevent accidental actuation tightening belts or tightening belts system damage.
● safety belt tightening system and maintenance work should be done by surrounding shops.
● SRS not alter or disconnect the line. Unauthorized electrical test equipment and detection equipment can not be used in safety belt tightening system.
● If you need to deal with tightening belts system or scrap the car, please contact franchise stores.
● handlers have the right pretensioners in the maintenance manual. Incorrect handling procedures can result in personal injury.
● pretensioner installed in the front seat and the seat belt retractor holder, which seat belt webbing with conventional methods using the same.
● When tightening belts start, you will hear considerable noise, it will then emerge smoke, this non-toxic smoke nor fire, but please be careful not to inhale, or otherwise cause respiratory irritation leading to suffocation, for those who have had breathing difficulties should immediately to fresh air.