79 teeth steering shaft assembly for volvo 21185810 20777165
| Type | Collapsible Steering Column |
| OEM number | 21185810 20777165 |
| Car Make | Volvo |
What Is a Collapsible Steering Column?
A collapsible steering column is a mechanism that is used to
transfer energy from the steering wheel into the steering gear box,
which transfers energy to turn the wheels of a vehicle. Though the
designs for steering columns have varied since their inception, a
typical collapsible steering column looks like two interlocking
shafts that attach directly to the steering wheel and the steering
gear box. The steering column is the shaft directly under the
steering wheel in which the ignition and automatic shift levers are
often located.
Why Are Collapsible Steering Columns Necessary?
When the steering column was first invented, it consisted of a
single, long, steel rod connecting the steering wheel to the
steering gear box. While this single-piece construction was
efficient, and effective in controlling the vehicle, it soon became
apparent that its design was unsafe in frontal collisions. Under
the single-piece system, when such an impact occurred, the steering
column would often impale the driver as it was rammed toward the
rear of the vehicle. The unsafe attributes of single-piece steering
columns called for the invention of a safer steering column design,
which is why Bela Barenyi designed the collapsible steering column
to replace it. The safely enhanced construction of the collapsible
steering column, no matter which design is used, absorbs, rather
than transfers, frontal impact energy by collapsing or breaking
upon impact. In this way, drivers involved in frontal impact
collisions are able to avoid the dangers of non-collapsible
steering parts.
How Does a Collapsible Steering Column Work?
Collapsible steering columns still consist of a long shaft that
connects the steering wheel to the steering gear box. However, the
collapsible design is composed of an inner and an outer sleeve,
pressed tightly together with a number of steel bearings in
between. These steel bearings are pressed into the metal sleeves,
and are held in place with a strong safety resin, which is designed
to harden and then shatter when a specific level of pressure is
applied. In the event of a frontal impact, the steel bearings
between the sleeves break free, allowing the inner sleeve to be
moved further into the outer sleeve in telescopic fashion before
enough pressure is achieved to ram the whole steering column into
the driver. In this manner, the energy received through a frontal
impact is completely absorbed by the steering column's collapsing
parts, allowing most modern drivers to remain completely unaware of
the danger they have avoided.
PRODUCT GURANTEE POLICY
For the period of two years or 50,000 kilometers,whichever occcurs
first,from the date of shipment,any shock absorber from CHONGQING
SKILL SCIENCE&TECHNOLOGY CO.,LTD,found to be defrctive in
material or workmanship in below cases,we will replace without
charge,or return the equal money back:
1.Installation sizes are wrong;
2.Oil or gas leakage;
3.Iron was rusty after painting;
4.welding position discount;
5.Damping force was out of test report range,±20% damping force
rate (National sdandard) should be allowed and born by the
purchaser;
6.0.5% of failure rate should be allowed.
Why choose Skill
1.Quality&Service
As a manufacturer,we can guarantee the quality control, delivery time and customer‘s
service.
2.Brand Awareness
We have a good reputation and a high credibility with 14 years
history.
3.Fair Price
Enter into direct business with us would save your cost.
4.OEM Accepted
We accept your specific order and do everything we can to meet your
requirement.
