GB 14166-1993 Performance requirements and test methods for automobile seat belts
Some standard content:
National Standard of the People's Republic of China
Motor vehicles-Safety belt assembliesPerformance requirements and test methods1Subject content and scope of application
This standard specifies the performance requirements for automobile seat belt assemblies and test methods. This standard applies to car seat belt assemblies used by passengers in forward-facing seats in M ??and N category cars. GB14166-93 | | tt | Seat belt assembly used on seats. bZxz.net
2 Reference Standards
GB6458-86 Neutral Salt Spray Test (NSS Test) for Metal Coverings 3 Terms
3.1 Class 1 Seat Belts
A safety belt that restricts the forward movement of the lower body of the occupant on the seat. 3.2 Category 1 safety belts
refer to safety belts that can not only restrict the forward movement of the occupant's body on the seat, but also restrict the excessive forward leaning of the upper body. 3.2.1 Class I Type A safety belt
refers to Class 1 safety belts except Class 1 Type B safety belts. 3.2.2 Category 1 Type B safety belt
refers to the Category 1 safety belt consisting of continuous waist and shoulder belts. 3.3 Seat belt assembly
refers to a structural safety device that can prevent or reduce injuries to the occupants when the car is subject to emergency braking or collision. The seat belt assembly (hereinafter referred to as the assembly) generally consists of a webbing, a buckle lock, an adjustment piece, a retractor and a fixing piece. 3.4 Webbing
refers to the flexible strip in the seat belt assembly that restrains the occupant on the seat. 3.5 Belt
refers to the webbing that restricts the forward movement of the passenger's lower body. 3.6 Shoulder belt
refers to the webbing that restricts the occupant's upper body from leaning forward excessively. 3.7 The waist and shoulder continuous belt
means that the belt and shoulder straps are made of a single integral webbing. 3.8 Belt buckle lock
refers to a connecting device that can restrain the occupant in the seat belt and quickly release it. 3.9 Adjustment parts
State Bureau of Technical Supervision approved on 1993-03-01 and implemented on 1993-07-01
refers to the parts used to adjust the length of the webbing. 3.10 Retractor
GB14166-93
refers to the device used to rewind and store part or all of the webbing in the seat belt assembly, and can play a specific role after adding certain mechanisms. According to their functions, they can be divided into: non-locking retractors (NLR), self-locking retractors (ALR) and emergency locking retractors (ELR). 3.10.1 Non-locking retractor (NLR)
means that the occupant can completely pull out the webbing from the retractor with a small external force, and maintain the tightening force when the webbing is fully pulled out. of retractor.
3.10.2 Self-locking retractor (ALR)
means that when the occupant can pull out the webbing with a small external force and stops pulling out the webbing at any position, the The locking mechanism can automatically lock near the stop position while maintaining the tightening force of the retractor. 3.10.3 Emergency locking retractor (ELR) means that the passenger can pull out the webbing with a small external force. Under normal driving conditions of the car, the webbing can freely expand and contract according to the needs of the passengers, but when the car speed (or due to other reasons) A retractor whose locking mechanism locks and maintains the tightening force when factors) change suddenly. Emergency locking retractors can be divided into webbing pull-out acceleration-sensitive types (hereinafter referred to as webbing-sensitive types), automobile acceleration-sensitive types (hereinafter referred to as vehicle body-sensitive types) and composite-sensitive types that are sensitive to both of the above. 3.11 The effective length of the webbing
refers to the maximum length of the webbing that can be pulled out by hand when the seat belt assembly is installed on the car and is not in use. 4 Performance requirements
4.1 Performance requirements for webbing
4.1.1 Standard state performance requirements
4.1.1.1 Tensile strength
When the webbing is tested according to the provisions of Article 5.1.1.2 , the tensile strength values ??of the two specimens shall not be lower than the requirements of Table 1. Table 1
category
waist
shoulder
part
belt
belt
waist and shoulder continuous belt||tt ||4.1.1.2 Width
When the webbing is tested according to the provisions of Article 5.1.1.3, the width of the webbing shall not be less than 46mm. 4.1.1.3 Elongation
Tensile strength
26 700
17700
22300
When the webbing is tested according to the provisions of 5.1.1.4, its The elongation value shall not be greater than the requirements in Table 2. Table 2
category
waist
different
belt
shoulder straps
waist and shoulder continuous belt
4.1.1.4 Energy absorption
Elongation
20
40
30
When the webbing is tested according to the provisions of Article 5.1.1.5, the unit length of the webbing (per meter) work and work ratio shall not be lower than the requirements in Table 3, N
%
category
waist
shoulder
belt||tt| |Belt
Continuous belt on waist and shoulders
Note: 1J=IN·m.
4.1.2 Aging performance requirements
4.1.2.1 Wear resistance
GB14166—93
Table 3
Work,
539
1080
784
Power ratio, %
50
60
55
When the webbing is put on the lock tongue , guide parts and adjustment parts, the webbing should be tested according to the provisions of 5.1.2.1. The tensile strength value of the webbing after wear shall not be less than 60% of the actual tensile strength value before the test, and shall not be less than 14700N. 4.1.2.2 Low temperature resistance
After the webbing is subjected to a low temperature test according to the provisions of Article 5.1.2.2, its tensile strength value shall not be lower than 60% of the actual tensile strength value before the test, and shall not be lower than 14700N.
4.1.2.3 High Temperature Resistance
After the webbing is subjected to a high temperature test according to the provisions of Article 5.1.2.3, its tensile strength value shall not be less than 60% of the actual tensile strength value before the test, and shall not Below 14700N.
4.1.2.4 Moisture resistance
After the webbing is immersed in water according to the provisions of Article 5.1.2.4, its tensile strength value shall not be less than 60% of the actual tensile strength before the test, and shall not be less than 14700N.
4.1.2.5 Light resistance
After the webbing is subjected to light irradiation test according to the provisions of Article 5.1.2.5, its tensile strength value shall not be lower than 60% of the actual tensile strength value before the test, and shall not Below 14700N.
4.2 Buckle lock performance requirements
4.2.1 Size of buckle lock opening button
The area of ??the surrounding closed buckle lock opening button shall not be less than 4.5cm\, and the width shall not be less than 1.5cm; the area of ??other buckle lock opening buttons shall not be less than 2.5cm, and the width shall not be less than 1.0cm. The color of the button should be in the red series (other parts of the lock should not be red at this time), or the words "Press" or "PRESS" should be marked on the button.
4.2.2 Buckle lock opening force
When the buckle lock is tested according to the provisions of Article 5.2.1, its opening force shall not be greater than 137N. 4.2.3 Durability
The buckle lock shall not fail after being tested according to the provisions of Article 5.2.2. 4.3 Adjustment force requirements of the adjustment parts
When the adjustment parts are tested according to the provisions of Article 5.3, the adjustment force shall not be greater than 49N. 4.4 Retractor performance requirements
4.4.1 Retraction force
When the retractor is tested according to the provisions of Article 5.4.1, the retraction force of the retractor used for belts must be greater than 2.6N , the retraction force of the retractor used for shoulder straps or continuous belts must be between 1 and 7N. 4.4.2 Lockless retractor
4.4.2.1 When the retractor is tested according to the provisions of Article 5.4.2, the remaining extension length of the webbing must be less than 6mm. GB14166—93
4.4.2.2 When the retractor is tested according to the provisions of Article 5.5, the total number of durability tests shall not be less than 10,000 times. After the test, the retraction force shall not be less than 50% of the actual retraction force value before the test, and the remaining extended length of the webbing shall comply with the requirements of Article 4.4.2.1. 4.4.3 Self-locking retractor
4.4.3.1 When the retractor is tested according to the provisions of Article 5.4.3, the movement of the webbing between two adjacent locking positions shall not exceed 25mm. 4.4.3.2. When the retractor is tested according to the provisions of Article 5.5, its durability shall not be less than 10,000 times in total. After the test, the retraction force shall not be less than 50% of the actual retraction force value before the test, and the movement of the webbing between two adjacent locking positions shall comply with the requirements of Article 4.4.3.1. 4.4.4 Emergency locking retractor
4.4.4.1 Before and after the retractor undergoes the durability test in accordance with the provisions of Article 5.5, its locking mechanism shall be locked in accordance with the provisions of Article 5.4.4 Performance test, the results should meet the following requirements, a. Ribbon-sensitive retractor: When the ribbon pull-out acceleration is 2.94m/s2 (0.3g), the retractor shall not be in a position where the ribbon pull-out length is no more than 50mm. Lock. When the webbing pull-out acceleration is 6.86m/s2 (0.7g), the retractor must be locked at a position where the webbing pull-out length is no more than 25mm,
b. Car body sensitive type: When the retractor When the acceleration is 6.86m/s* (0.7g), the retractor must be locked at a position where the pulled out length of the webbing is no more than 25mm. The retractor shall not be locked when tilted 12° in any direction; c. Composite sensitive type: When the pull-out acceleration of the webbing is 2.94m/s (0.3g), the retractor shall not be locked when the pull-out length of the webbing is no more than 50mm. When the pull-out acceleration of the webbing is 19.60m/s (2.0g), the retractor must be locked at a position where the pull-out length of the webbing is no more than 50mm. When the acceleration of the retractor is 6.86m/s2 (0.7g), the retractor must be locked at a position where the pulled-out length of the webbing is no more than 25mm. The retractor must not lock when tilted 12° in either direction. 4.4.4.2 When the retractor is subjected to the durability test in accordance with the provisions of Article 5.5, the total number of durability tests shall not be less than 50,000 times, of which at least 10,000 times shall cause the locking mechanism of the retractor to be locked, and its retraction force shall not be low. 50% of the actual retraction force value before the test. 4.4.4.3 When performing the locking performance test of the retractor locking mechanism, for the retractor installed on a Class N vehicle, the acceleration value in the performance requirements a, b, and c in 4.4.4.1 can be 6.86m /s (0.7g) was changed to 14.70m/s (1.5g) for the test. 4.5 Assembly performance requirements
4.5.1 Performance requirements for Category 1 seat belts
When the Category I seat belt assembly is installed and tested in accordance with the provisions of Article 5.6.2, the assembly shall be able to withstand Tensile load of 22300N. At this time, the movement of the roller shall not exceed 180mm. The buckle lock must not open by itself, and the assembly must not fail. 4.5.2 Performance requirements for Category 1 seat belt assemblies. When installed and tested in accordance with the provisions of Article 5.6.3, the waist belt in Category I Type A and Type B seat belt assemblies shall be able to withstand a tensile load of 22300N. At this time, the movement of the roller shall not exceed 180mm. The shoulder straps in Class I Type A and Type B seat belt assemblies should be able to withstand a tensile load of 13300N when installed and tested in accordance with the provisions of Article 5.6.3. At this time, the movement of the roller shall not exceed 250mm. The waist and shoulder belts of Class I type A and B safety belts should be able to withstand a tensile load of 26700N when installed and tested in accordance with the provisions of Article 5.6.3. At this time, the movement of the roller shall not exceed 250mm. The buckle lock must not open by itself, and the assembly must not fail. 5 Test method
5.1 Ribbon performance test method
5.1.1 Standard state test
5.1.1.1 Standard temperature and humidity treatment
Cut 2 pieces of sufficient length from the ribbon of specimens. Then place the sample in an environment with a temperature of 20±5°C and a relative humidity of (65±5)%, and undergo standard temperature and humidity treatment for at least 24 hours. 5.1.1.2 Tensile strength test
The specimens treated according to the provisions of 5.1.1.1 shall be tested immediately. Clamp the sample on the tensile testing machine. The distance between the clamping parts is 220±20mm (as shown in Figure 1). The testing machine is loaded at a speed of about 100mm/min, and the load value when the sample breaks is measured. The average load value when two specimens break GB14166-93
can be used as the actual tensile strength value before the test of each item in 4.1.2.1~4.1.2.5. E
1
Webbing
Figure 1
5.1.1.3 Width test
When the tensile strength test of the webbing is carried out according to the provisions of 5.1.1.2 , without stopping the stretching of the testing machine, measure the width value of the middle part of the sample when the tensile load is 9810N. 5.1.1.4 Elongation test
When the tensile strength test of the webbing is carried out according to the provisions of Article 5.1.1.2, when the tensile load reaches 196N, mark the initial value 100mm from the middle of the sample to both ends. point (the marking mechanism of the testing machine can be used), and measure the distance between the two initial points when the tensile load is 11100N. The elongation of the webbing is calculated according to the following formula: L—200
Elongation (%) =:
200
Where: L—11100N between two initial points under tensile load distance, mm. 5.1.1.5 Energy absorption
Then reduce the load from 11100N to 196N at a speed of about 100mm/min. Make a load-elongation curve (see Figure 2). By dividing the work area (△ABD area) enclosed by the initial load (196N) to the maximum load (11100N) by the distance between the initial points at the initial load, the work per unit length (per meter) of the ribbon can be obtained. The power ratio is calculated according to the following formula: power ratio (%) =
AABC area
×100
AABD area
000000
..... (2)
5.1.2 Ribbon aging test
5.1.2.1 Wear resistance test
Zeng He, N
11100
GB14166—93|| tt||Figure 2
jd
Extension mm
The structural characteristic dimensions of the test device should comply with the requirements of Figures 3 and 4. In Figure 3, the surface hardness of the hexagonal rod is HRB97101, the material is stainless steel, the edge radius is 0.5±0.1mm, the distance between the two surfaces is 6.35±0.03mm, and the surface is in a cold-drawn state. The mass of the counterweight in Figure 3 is 2.3±0.05kg, and the mass of the counterweight in Figure 4 is 1.36±0.05kg. Note: 1) The material should comply with the requirements of SUS416 and SAE51416 in JISG4303 "Stainless Steel Rods". The two specimens are installed as shown in Figure 3. One end of the webbing is added with a counterweight, and the other end is connected around the hexagonal rod and connected to the balance wheel. The balance wheel swings back and forth at a rate of 30±1a.
times/min, causing the ribbon to rub back and forth on the two edges of the hexagonal rod 2500 times, with a friction stroke of 330±30mm. The edges of the used hexagonal rods must not be used again; b. For the webbing that passes through the adjustment piece, take two samples and install them as shown in Figure 4. The sample reciprocates in the adjustment piece at a rate of 17±1 times/min. After 2500 frictions, the friction stroke is 175±25mm. After the friction test, use the worn area as the clamping distance and conduct a tensile strength test in accordance with the provisions of 5.1.1.2. Hexagonal rod
2.3±0.05kg
85*±2
Configuration
Webbing
Balance wheel
Crank arm||tt| |Crank
Figure 3
fulcrum
stop
adjustment piece
1.36±0.05kg
5.1.2.2 Low temperature resistance test
GB14166—93
Datum point
8°±2
Webbing
Counterweight
Figure 4
Datum Point
Before the test, the two specimens should be treated in the standard temperature and humidity state according to the provisions of Article 5.1.1.1. The processed samples should be placed horizontally in a low temperature box with a temperature of -30±5℃ in a timely manner. After 1.5 hours, fold the sample and press a weight with a temperature of -30±5°C and a mass of 2±0.05kg on the folded area. The sample continues to be kept in the above low temperature environment for 30 minutes. Finally, take out and flatten the sample, and immediately conduct the tensile strength test according to the provisions of 5.1.1.2. 5.1.2.3 High temperature resistance test
Place the two specimens in an environment with a temperature of 60 ± 5°C for 3 hours. After taking them out, conduct a tensile strength test immediately according to the provisions of Article 5.1.1.2. 5.1.2.4 Moisture resistance test
Immerse two specimens in test water at 20±5℃ for 3 hours. The test water is prepared by adding 1g humidifier to 1dm2 water. After the sample is taken out of the water, the tensile strength test shall be carried out immediately according to the provisions of Article 5.1.1.2. 5.1.2.5 Light fastness test
The light fastness test device must comply with the requirements of Appendix A (Supplement). The two specimens were hung vertically on the inside of the specimen frame and irradiated with light for 100 hours without water spray. In order to ensure uniform illumination on the surface of the sample, the position of the sample should be changed up and down every 20 hours. After 100h, take out the sample and carry out standard temperature and humidity treatment according to the provisions of 5.1.1.1. The treated specimens shall be subjected to tensile strength test immediately according to the provisions of Article 5.1.1.2. 5.2 Buckle lock performance test method
5.2.1 Opening force test
The buckle lock opening force test should be conducted during the assembly performance test. The number of specimens is 1 piece. According to the provisions of Article 5.6.2 or 5.6.3, after applying a tensile load of 22300N to the assembly, reduce the load to 667±39N at a speed of approximately 100mm/min, and open the buckle lock from the direction that generates the maximum opening force. The button exerts an opening force. For push-button buckle locks, the point of action of the opening force should be at least 3.2mm away from the edge of the button. 5.2.2 Durability test
Open and lock the belt buckle 5000 times each in normal use. The number of specimens is 1 piece. 5.3 Test method for adjusting force of adjusting parts
This test is only applicable to seat belts equipped with adjusting parts. The number of specimens is 1 piece. Install the webbing on the adjusting piece according to the state of use, fix the adjusting piece, then fix the end that passes through the adjusting piece on the tensile testing machine, pull the webbing at a speed of about 500mm/min, when the webbing has pulled through the adjusting piece by about 25mm Measure the tensile force. The adjusting force must be measured in both the lengthening and shortening directions of the seat belt GB14166-93
. Before the test, 10 reciprocating pre-tensions should be carried out. 5.4 Retractor performance test method
5.4.1 Retraction force test
The number of specimens is 1 piece. Fix the retractor according to the installation state on the car, pull out all the webbing, and then roll the webbing back into the retractor at a speed of about 500mm/min. When the length of the rolled-in webbing is 25% of the effective length of the webbing When ±50mm, measure the retracting force of the retractor. For retractors with upper guides, measure the retraction force as shown in Figure 5. Upper guide
Dynometer
Replacement device
Figure 5
5.4.2 Residual protrusion length test
The number of specimens is 1 piece . During the test, fix the retractor so that the outlet of the webbing is facing downwards, and apply a pulling force of 18N in the direction of pulling out the webbing to pull out the webbing. If it is a belt retractor, reduce the tension to 14N. If it is a shoulder strap retractor, reduce the tension to 5N. Measure the difference between the pulled out length of the webbing and the effective length of the webbing when the tension is reduced. 5.4.3 Automatic locking position test
The number of specimens is 1 piece. Pull out all the webbing from the usual direction of use, and then roll the webbing back into the retractor. When the length of the rolled-in webbing is about 25% of the effective length of the webbing, take two adjacent locking positions and lock them in sequence. The corresponding webbing movement is measured as the distance between two adjacent locking positions in the webbing pull-out direction. 5.4.4 Emergency locking test
The number of specimens is 1 piece. The test device should have the same or similar structure as shown in Figure 6 (a) and (b), and can make the retractor (or webbing) reach the acceleration value specified in the test within 50ms. Fix the retractor on the test device according to its installation state on the car. When performing the following locking test, the locking position of the webbing should be at a point where the length of the webbing rolled up by the retractor is approximately 25% of the effective length of the webbing. Ribbon
Retractor
GB14166-93
Retractor
(a)
Ribbon
(b)||tt ||Figure 6
5.4.4.1 Webbing sensitive retractor
The acceleration direction of the webbing is the pull-out direction of normal use. When the reel of the retractor is at an angle of 0°, 45°, 135° and 180° to the horizontal plane, check that the webbing pull-out acceleration is 2.94m/s2 (0.3g) and 6.86m/s\(0.7g) respectively. Check whether the retractor is locked and measure the pulled length of the webbing.
5.4.4.2 Car body sensitive type
Check that the acceleration direction of the retractor is the front, rear, left and right directions of the car, and the acceleration of the retractor is 6.86m/s (0.7g) , whether the retractor is locked, and measure the pulled length of the webbing. In addition, tilt the retractor 12° to the front, rear, left and right directions of the car and secure it, and slowly pull the webbing in the usual pull-out direction by hand to check whether it is locked.1 Webbing sensitive retractor
The acceleration direction of the webbing is the pull-out direction of normal use. When the reel of the retractor is at an angle of 0°, 45°, 135° and 180° to the horizontal plane, check that the webbing pull-out acceleration is 2.94m/s2 (0.3g) and 6.86m/s\(0.7g) respectively. Check whether the retractor is locked and measure the pulled length of the webbing.
5.4.4.2 Car body sensitive type
Check that the acceleration direction of the retractor is the front, rear, left and right directions of the car, and the acceleration of the retractor is 6.86m/s (0.7g) , whether the retractor is locked, and measure the pulled length of the webbing. In addition, tilt the retractor 12° to the front, rear, left and right directions of the car and secure it, and slowly pull the webbing in the usual pull-out direction by hand to check whether it is locked.1 Webbing sensitive retractor
The acceleration direction of the webbing is the pull-out direction of normal use. When the reel of the retractor is at an angle of 0°, 45°, 135° and 180° to the horizontal plane, check that the webbing pull-out acceleration is 2.94m/s2 (0.3g) and 6.86m/s\(0.7g) respectively. Check whether the retractor is locked and measure the pulled length of the webbing.
5.4.4.2 Car body sensitive type
Check that the acceleration direction of the retractor is the front, rear, left and right directions of the car, and the acceleration of the retractor is 6.86m/s (0.7g) , whether the retractor is locked, and measure the pulled length of the webbing. In addition, tilt the retractor 12° to the front, rear, left and right directions of the car and secure it, and slowly pull the webbing in the usual pull-out direction by hand to check whether it is locked.
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