QC/T 633-2022 (QC/T633-2022, QCT 633-2022, QCT633-2022)
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The seats of passenger vehicles
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QC/T 633-2022
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Standards related to: QC/T 633-2022
| Standard ID | QC/T 633-2022 (QC/T633-2022) | | Description (Translated English) | The seats of passenger vehicles | | Sector / Industry | Automobile & Vehicle Industry Standard (Recommended) | | Word Count Estimation | 17,157 | | Date of Issue | 2022-04-08 | | Date of Implementation | 2022-10-01 | | Summary | This standard specifies the requirements, test methods, inspection rules and signs, packaging, transportation and storage of passenger seats on passenger cars. This standard applies to passenger seats of M2 and M3 passenger cars. This standard does not apply to plastic seats used in class A and class I passenger cars of M2 and M3 and student seats on special school buses. | QC/T 633-2022
QC
AUTOMOBILE INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.60
CCS T 42
Replacing QC/T 633-2009
The seats of passenger vehicles
ISSUED ON: APRIL 08, 2022
IMPLEMENTED ON: OCTOBER 01, 2022
Issued by: Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword ... 6
1 Scope ... 9
2 Normative references ... 9
3 Terms and definitions ... 10
4 Requirements ... 13
5 Test method ... 17
6 Inspection rules ... 19
7 Marking, packaging, transportation, storage ... 20
The seats of passenger vehicles
1 Scope
This document specifies the requirements, test methods, inspection rules and signs,
packaging, transportation, storage of the seats of passenger vehicles.
This document is applicable to passenger seats of categories M2 and M3 passenger
vehicles.
This document does not apply to the plastic seats, which are used in Class A and Class
I passenger vehicles of category M2 and M3, as well as student seats of special school
buses.
2 Normative references
The contents of the following documents constitute the essential provisions of this
document through normative references in the text. For the dated documents, only the
versions with the dates indicated are applicable to this document; for the undated
documents, only the latest version (including all the amendments) is applicable to this
standard.
GB 11550 Strength requirement and test of automobile seats head restraints
GB/T 13053-2008 Bus inner dimensions
GB 13057 Strength of the seats and their anchorages of passenger vehicles
GB 13094 Safety requirements for bus construction
GB/T 13306 Plates
GB 14166 Safety-belts, restraint systems, child restraint systems and ISOFIX child
restraint systems for occupants of power-driven vehicles
GB 14167 Safety-belt anchorages, ISOFIX anchorages systems and ISOFIX top
tether anchorages for vehicles
GB 15083 Strength requirement and test method of automobile seats, their
anchorages and any head restraints
GB 18580 Indoor decorating and refurbishing materials - Limit of formaldehyde
emission of wood-based panels and finishing products
GB 18583 Indoor decorating and refurbishing materials - Limit of harmful
substances of adhesives
GB/T 24551 Safety belt reminder for motor vehicles
GB/T 25750 Lockable gas spring technical specification
GB/T 29120 Procedure for H-point and R-point determination
GB/T 30512 Requirements for prohibited substances on automobiles
GB/T 33276 Knitted fabrics and knitted composite fabrics for automotive interior
GB/T 33389 Woven fabrics and woven composite fabrics for automotive interior
GB 34660 Road vehicles - Requirements and test methods of electromagnetic
compatibility
GB 38262 Flammability of interior materials for buses
HG/T 2006 Thermosetting powder coatings
JB/T 5943 Engineering machinery - General technical specifications for weldments
QB/T 2080 Flexible cellular polymeric materials-high-resilience polyurethane foam
QB/T 2703 Automotive upholstery leather
QB/T 4043 Polyvinyl chloride artificial leather for automotive
QB/T 4194 Polyurethane synthetic leather used for vehicle
QC/T 15 General test method for automobile plastic products
QC/T 47 Automobile seat terminology
QC/T 484 Automobile paint coating
QC/T 625 Metallic coatings and conversion coatings for automobiles
QC/T 844 Technical specification of recliner for passenger car seats
QC/T 29106 Technical specification of automobile wire harness
3 Terms and definitions
The terms and definitions as defined in GB/T 13053, GB 13094, GB 15083, GB/T
29120, QC/T 47, as well as the following terms and definitions, apply to this document.
lateral outer side of the seat cushion is parallel to the longitudinal center plane of the
seat.
3.7
Angle of seat cushion
On the center plane of the seat, the angle -- between the centerline of the thigh and
the horizontal line.
3.8
Height of backrest
On the center plane of the seat, along a line parallel to the torso line passing through
point G, the distance -- from the top of the backrest to point G.
3.9
Width of backrest
When the seat cushion is not depressed, the width -- between the two outer sides of
the backrest, at 250 mm above the horizontal plane, which is tangent to the
uppermost surface of the seat cushion, on the longitudinal center plane of the seat.
3.10
Height of armrest
The vertical height -- from the highest point on the upper surface of the handrail to
point R'.
3.11
Width of armrest
The minimum width of the armrest's support surface.
3.12
Angle between backrest and cushion
In the center plane of the seat, the angle -- between the torso line and the center line
of the thigh.
3.13
Adjustable range of backrest angle
4.4.1 The seat adjustment device shall have a self-locking function, which can be self-
locking in any use position; it shall be easy to adjust, easy to operate, reliable in locking,
free from stagnation.
4.4.2 Carry out the adjustment force (moment) test of the seat adjustment device,
according to the method specified in 5.3; the adjustment force (moment) shall meet the
following requirements:
a) For seats with detachable headrests, the unlocking force of the headrest shall not
be greater than 20 N; the operating force shall not be greater than 100 N.
b) For the seat backrest angle adjustment device, the unlocking torque of the handle-
type adjusting mechanism shall not exceed 6 N · m; the unlocking torque of the
knob-type adjusting mechanism shall not exceed 4 N · m; the unlocking force of
the button-type adjusting mechanism shall not exceed 60 N. When adjusting the
backrest angle, the adjustment torque of the backrest shall not exceed 80 N · m.
c) The locking force of the lateral adjustment mechanism of the seat assembly shall
not be less than 2000 N; the unlocking force of the handle of the lateral adjustment
mechanism shall not be greater than 80 N; the operating force shall not be greater
than 200 N.
4.4.3 After the seat lateral adjustment fatigue performance test is carried out according
to the method specified in 5.4, the operation of the slideway shall be light and flexible;
the unlocking function shall be normal and effective.
4.4.4 After performing the seat back adjustment fatigue performance test according to
the method specified in 5.5, the backrest's lockable gas spring shall have no oil leakage
or air leakage; the backrest recliner shall not be deformed or damaged; the seat backrest
shall be adjusted freely, light and flexible, without function failure.
4.4.5 For the seat back angle adjustment device with lockable gas spring structure, the
lockable gas spring shall comply with the provisions of GB/T 25750. For the seat back
angle adjustment device with mechanical structure, the recliner shall comply with the
provisions of QC/T 844.
4.5 Seat back frame requirements
4.5.1 Carry out the gap test of the seat back frame assembly, according to the method
specified in 5.6; the gap of the seat back frame assembly shall meet the requirements in
Table 3.
4.5.2 Carry out the stiffness test of the seat back frame assembly, according to the
method specified in 5.7; its plastic deformation after unloading shall not exceed 10 mm.
4.5.3 After the durability test of the seat back frame assembly is carried out, according
to the method specified in 5.8, there shall be no cracks in the back frame assembly.
4.6 Armrest requirements
4.6.1 The rotational moment of the armrest, on the active side of the seat, shall not
exceed 25 N • m.
4.6.2 Carry out the static strength test of the side armrest of the seat, according to the
method specified in 5.9. The armrest shall not be broken, damaged or fall off from the
seat, etc. After the load is removed, its permanent deformation shall not exceed 10 mm.
4.6.3 After the cycle test of the side armrest of the seat is carried out, according to the
method specified in 5.10, the armrest shall maintain its normal use function, without
breaking, peeling off of the surface covering material, or exposure of the bottom, etc.
4.7 Footrest requirements
4.7.1 Carry out the static strength test of the seat footrests, according to the method
specified in 5.11. The footrests shall not be broken, damaged or fall off from the seat.
4.7.2 After the cycle test of the seat footrests is carried out, according to the method
specified in 5.12, the footrests shall maintain their normal function, without breaking,
damage or falling off from the seat.
5 Test method
5.1 Strength test of the seat and its vehicle fixings
The strength test of the seat and its vehicle fixings shall be carried out, in accordance
with the test methods specified in GB 13057.
5.2 Position and strength test of seat belt fixation point
The position and strength test of the fixed point of seat belt installation shall be carried
out, in accordance with the test method specified in GB 14167.
5.3 Performance test of seat adjustment device
Apply a uniform load of 667 N on the seat cushion. Use a dynamometer, to measure the
opening force of the lateral adjustment handle of the seat assembly, the operating force
of the lateral adjustment, the unlocking force (moment) of the backrest adjustment
device;
of loadings is 10000; the loading frequency is 30 times/min. When a seat has more than
one seating position, the force shall be applied to the backrest frame of each seat, at the
same time.
5.9 Static strength test of seat side armrest
Adjust the side armrest of the seat to the design position. At a distance of 50 mm from
the front edge of the seat armrest, apply the following load at the same time, for a
duration of 5 s:
a) Vertical downward load: 800 N;
b) Lateral horizontal load: 200 N.
After removing the load, measure the vertical deformation of the armrest, at the loading
point.
5.10 Cycle test of seat side armrest
Fix the seat side armrest assembly on the test bench. Take the closed position of the seat
armrest as the starting position of the cycle test. Open the armrest, from the closed
position to the working position; then close it from the working position to the closed
position, which is taken as the 1 cycle. 30000 cycles shall be completed, at a frequency
of (10 ~ 30) cycles/min.
5.11 Static strength test of seat footrests
Install the seat footrest assembly on the test bench. Apply a load of 1200 N, on the
footrest surface, which is perpendicular to the seat footrest for 5 s. After removing the
load, observe the footrest assembly for use and damage. For adjustable footrests, the
highest use position shall be selected for testing.
5.12 Cycle test of seat footrest
Fix the seat footrest assembly on the test bench. Take the initial position of the footrest,
as the initial position of the cycle test. Move the footrest from the initial position to the
end position, then back to the initial position, which is taken as one cycle. 10000 cycles
shall be completed, at a frequency of (10 ~ 30) cycles/min.
6 Inspection rules
6.1 Exit-factory inspection
6.1.1 The seat shall pass the inspection by the quality inspection department of the
manufacturer AND be issued with the product certificate, before leaving the factory.
6.1.2 See Table 5, for the exit-factory inspection items.
6.2 Type inspection
6.2.1 In the following cases, the type inspection shall be carried out on the product:
a) Type identification of new products put into production or old products after trans-
plant production;
b) After the official production, the structure, material and process have changed
greatly, which may affect the performance of the product;
c) Normal production for 2 years or as agreed upon by both parties;
d) When production resumes after the product has been discontinued for one year;
e) When the quality supervision agency requests type inspection.
6.2.2 See Table 5 for type inspection items.
7 Marking, packaging, transportation, storage
7.1 Marking
Each set of seats shall have a label when leaving the factory, which shall comply with
the relevant provisions of GB/T 13306. For the adjustable parts of the seat, eye-catching
operation instructions shall be marked in obvious positions.
7.2 Packaging
Seat cushions and backrests of seats must have protective packaging. The moving parts
shall be coated with protective grease as required.
7.3 Transportation
Seats shall be loaded and unloaded gently, during transportation, to avoid damage from
bumps and protect from exposure to sun and rain.
7.4 Storage
Seats shall be stored in dry, ventilated, fireproof warehouse, where there is no corrosive
gas. It shall not be under heavy pressure, to avoid deformation.
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