JB/T 10750-2018 English PDF (JBT10750-2018)

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JB/T 10750-2018: Towing tractor
JB/T 10750-2018
JB
MECHANICAL INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 53.060
J 83
Filing No.: 61713-2018
Replacing JB/T 10750-2007, JB/T 10751-2007
Towing tractor
ISSUED ON: FEBRUARY 09, 2018
IMPLEMENTED ON: OCTOBER 01, 2018
Issued by: Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword ... 4
1 Scope ... 7
2 Normative references ... 7
3 Terms and definitions ... 8
4 Basic parameters ... 10
5 Technical requirements ... 11
5.1 Basic requirements ... 11
5.2 Performance requirements ... 13
5.3 Electrical requirements ... 14
5.4 Safety and environmental requirements ... 15
5.5 Safety requirements for LPG towing tractors ... 17
5.6 Safety requirements for natural gas towing tractors ... 17
5.7 Reliability enhancement ... 19
6 Test method ... 19
6.1 General test conditions ... 19
6.2 Visual inspection ... 21
6.3 Measurement of main structural dimensions ... 21
6.4 Determination of main technical performance parameters ... 21
6.5 Paint film adhesion test ... 21
6.6 Steering performance ... 21
6.7 Determination of maximum running speed ... 22
6.8 Traction performance test ... 22
6.9 Braking performance test ... 24
6.10 Energy consumption test ... 24
6.11 Rain test ... 25
6.12 Electrical control system test ... 25
6.13 Voltage withstanding test ... 26
6.14 Hose pressure test ... 26
6.15 Insulation test ... 26
6.16 Diesel engine emission test ... 26
6.17 Noise test ... 26
6.18 Piping leak test ... 27
6.19 Reliability enhancement test ... 27
7 Inspection rules ... 30
7.1 Exit-factory inspection ... 30
7.2 Type inspection ... 30
8 Marking, accompanying documents, transport, storage ... 32
8.1 Marking ... 32
8.2 Accompanying documents ... 32
8.3 Transportation and storage ... 33
Appendix A (Normative) Judgment of towing tractor faults in reliability enhancement
test ... 34
Towing tractor
1 Scope
This standard specifies the terms and definitions, basic parameters, technical
requirements, test methods, inspection rules, signs, accompanying documents,
transportation, storage of the following types of towing tractors:
a) Battery towing tractor;
b) Internal combustion towing tractors, including: towing tractors fueled by diesel,
gasoline, liquefied petroleum gas, natural gas, as well as hybrid towing tractors.
This standard applies to battery towing tractors, which have a rated hook traction force
not greater than 20 kN, AND internal combustion towing tractors, which have a rated
hook traction force not greater than 32 kN. Battery towing tractors, which have a rated
hook traction force greater than 20 kN AND internal combustion towing tractors, which
have a rated hook traction force greater than 32 kN, may use this standard as a reference.
This standard is also applicable to liquefied petroleum gas towing tractors, liquefied
natural gas towing tractors which have a rated pressure not greater than 1.6 MPa,
compressed natural gas towing tractors which have a rated pressure not greater than 20
MPa.
2 Normative references
The following documents are essential to the application of this document. 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/T 4208-2017 Degrees of protection provided by enclosure (IP code)
GB 4785 Prescription for installation of the external lighting and light-signaling
devices for motor vehicles and their trailers
GB/T 7593 Powered industrial trucks - Symbols for operator controls and other
displays
GB/T 7939 Hydraulic fluid power - Hose assemblies - Test methods
GB/T 9286-1998 Paints and varnishes - Cross cut test for films
preventing the pressure in the system from exceeding a predetermined value. The
device shall be designed and installed, to prevent accidental loosening or adjustment. A
tool or key is required to adjust the pressure.
5.1.8 There shall be no sharp edges and corners in the normal driving position of the
operator AND within the scope of entering and exiting the operating platform.
5.1.9 The exposed surface of the towing tractor shall be smooth and beautiful. The paint
shall be even and free from defects, such as cracks, peeling, accumulation, foaming.
5.1.10 The towing tractor shall be tested according to the provisions of GB/T 9286-
1998. The adhesion of the paint film shall not be lower than the secondary quality
requirements.
5.1.11 The maximum operating speed of walk-on battery towing tractors shall not
exceed 4 km/h (speed not adjustable) or 6 km/h (speed adjustable). The maximum
operating speed -- of the stand-on battery towing tractor and the walk-on battery towing
tractor which has a folded plate for the operator to stand on -- shall not be greater than
16 km/h.
5.2 Performance requirements
5.2.1 Steering performance
5.2.1.1 In-situ steering force of the steering wheel
5.2.1.1.1 The steering shall be light and flexible. When turning a towing tractor with
power steering, the steering force acting on the steering wheel shall be 8 N ~ 25 N, the
difference between left and right steering shall not exceed 10 N. When the towing
tractor is running straight at the maximum speed, there shall be no obvious snaking
phenomenon.
5.2.1.1.2 When the towing tractor without power steering or assisted steering is parked,
the steering wheel is in the straight-line driving position; the steering force of operating
the steering wheel to the left (or right), for the first half turn, shall not exceed 177 N.
Thereafter, the steering force during turning to the left (or right) limit position shall not
exceed 355 N; the maximum free rotation angle of the steering wheel to the left (or
right) shall not exceed 15°; the maximum rotation angle of the steering wheel to the left
(or right) shall not exceed 1080°.
5.2.1.2 Turning performance of right-angle passage
When the towing tractor passes through the prescribed right-angle passage to the left
and right, it shall pass successfully at one time; it shall not back up during the turning
process. If the towing tractor fails to turn successfully through the right-angle passage,
it is allowed to do it again, but it shall not exceed 3 times.
5.2.2 Traction performance
Comparing the measured traction force-operating speed characteristic curve of an
internal combustion towing tractor with the design curve, the difference between the
traction force, at the same operating speed, shall not exceed ±10%. Comparing the
measured traction force-operating speed characteristic curve of a battery towing tractor
with the design curve, the traction force difference, under the operating current of the
traction motor, shall not exceed ±10%.
5.2.3 Braking performance
The performance of the tractor brake shall comply with the provisions of GB/T 18849.
When the combination tractor runs on a slope greater than 10%, it shall be considered
that the trailer has a braking function in the design.
5.2.4 Energy consumption
The continuous driving time and the mileage of a single charge of the battery towing
tractor shall not be less than the design value.
5.2.5 Rainproof sealing performance
After the rain test of a towing tractor with a cab, the score according to QC/T 476 shall
not be less than 80 points. The operator shall operate the vehicle immediately and it