GB/T 31879-2015 English PDF (GB/T31879-2015)

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GB/T 31879-2015: Road Vehicles - General Technical Requirements for Fifth Wheel
GB/T 31879-2015
Road vehicles.General technical requirements for fifth wheel
ICS 43.080.10
T71
National Standards of People's Republic of China
General technical conditions for road vehicle traction
Released on.2015-09-11
2015-12-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
China National Standardization Administration issued
Content
Foreword III
1 range 1
2 Normative references 1
3 Terms and Definitions 1
4 Model 2
5 Technical requirements 2
6 Test method 3
7 Inspection rules 3
8 Marking, transportation and storage, product accompanying documents 4
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by the Ministry of Industry and Information Technology of the People's Republic of China.
This standard is under the jurisdiction of the National Automotive Standardization Technical Committee (SAC/TC114).
This standard was drafted. Highway Science Research Institute of the Ministry of Transport, Qingdao Aobotan Vehicle Equipment Co., Ltd., China National Heavy Duty Truck Group Technology
Development Center, Beijing Foton Daimler Automobile Co., Ltd., Jost (China) Auto Parts Co., Ltd., Jiangsu Provincial Highway Society, Zhenjiang City Bao
China Semi-trailer Accessories Co., Ltd.
The main drafters of this standard. Zhang Hongwei, Zhang Xueli, Dong Jinsong, Ma Yanshi, Guo Yanling, Cai Min, Jin Mingxin, Wang Xincheng, Li Xuedeng, Zhou Gang,
District Chuanjin, Zong Chengqiang, Zhang Hao.
General technical conditions for road vehicle traction
1 Scope
This standard specifies the type, technical requirements, test methods, inspection rules, marking, transportation and storage of the traction seat and the accompanying documents of the product.
This standard is applicable to the 50th and 90th traction brackets respectively connected with the traction pins specified in GB/T 4606 and GB/T 4607.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only the dated version applies to this article.
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 4357 cold drawn carbon spring wire
GB/T 4606 Road vehicle semi-trailer traction seat No. 50 traction pin basic size and installation, interchangeability
GB/T 4607 Road vehicle semi-trailer traction seat No. 90 traction pin basic size and installation, interchangeable size
GB/T 9969 General guidelines for the use of industrial products
GB/T 13306 signage
GB/T 13880 road vehicle traction seat interchangeability
GB/T 20069 road vehicle traction seat strength test
HG/T 2196-2004 Automotive Rubber Material Classification System
JB/T 5943 General technical conditions for welding parts of construction machinery
QC/T 484-1999 Automotive paint coating
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Traction seat fifthwheel
The utility model has the function of engaging and locking with the semi-trailer traction pin through the locking mechanism, and can be transmitted between the semi-trailer tractor and the semi-trailer
Horizontal force and vertical force device. According to the number of swing axes, it can be divided into two types. single-axis traction seat and double-axis traction seat;
The specifications of the tractor pin can be divided into two types. the 50th traction seat and the 90th traction seat.
3.2
Single axis traction seat singleaxiallinefifthwheel
A traction seat that can swing longitudinally about the transverse axis of the traction seat.
3.3
Double-axis traction seat doubleaxiallinefifthwheel
A traction seat capable of longitudinally oscillating about the transverse axis of the traction seat and laterally oscillating about the longitudinal axis of the traction seat.
3.4
Traction height theheightoffifthwheel
The vertical distance (H) from the plane of the traction seat to the bottom of the traction support.
see picture 1.
Figure 1 The height of the traction seat and the front and rear swing angle
4 models
The method of indicating the type of the traction seat is as follows.
Enterprise name code (composed of 2 to 3), customized by the company
FW
Traction code
××
Matching traction pin models (50, 90)
Traction bearing structure type (S. single axis, D. double axis)
-×××
Height of the traction seat in mm
-××
The rated load mass of the traction seat, in t
Example. Single-axis traction seat produced by × company, the matching traction pin type is No. 50, the height of the traction seat is 185mm, the rated load mass is 20t, its model
Expressed as. × FW50S-185-20.
5 Technical requirements
5.1 Basic requirements
5.1.1 The towing seat shall comply with the requirements of this standard and be manufactured in accordance with the drawings and technical documents approved by the prescribed procedures.
5.1.2 The interchangeability of the traction seat shall comply with the provisions of GB/T 13880.
5.1.3 The height level of the traction seat should meet the requirements of GB/T 13880. The following values should be used, as shown in Table 1.
Table 1 The height of the traction seat is in millimeters
Traction Level 1 Level 2 Level 3 Level 4 Level 5 Level 6
Height range (H) 140~159 160~179 180~199.200~219 220~239 240~260
Recommended value (H) 150 170 185.200 225 250
5.1.4 Each moving friction part of the traction seat should be provided with lubrication points in the accessible position; the oil cup should be complete and effective, and the grease should be added.
5.1.5 The lock hook, wedge block, tie rod and seat plate of the traction seat should be flexible, and there should be no looseness, blockage and jamming.
Except for rubber damping to the swing belt.
5.1.6 The joint between the hitch lock hook and the traction pin should be reliable and self-locking, the clearance should be adjustable, and the adjustment mechanism should be able to lock and
Safety device with anti-loose.
5.2 Parts Requirements
5.2.1 The spring of the traction seat should be made of spring steel wire in accordance with GB/T 4357. After the spring assembly, it will be stretched and rebounded in 15000 times.
The rear pull should be no less than 90% of the original pull.
5.2.2 The rubber material for the traction seat should be made of AA rubber material in accordance with HG/T 2196-2004.
5.2.3 The welding quality of the components shall comply with the relevant provisions of JB/T 5943.
5.2.4 The joint surface of the traction seat plate shall be distributed with an oil storage groove with a flatness of 1.0 mm.
5.2.5 The hardness of the joint surface of the traction seat lock hook and the traction pin is HRC25~32, and should be lower than the hardness of the joint surface of the traction pin.
5.2.6 The exposed surface of the traction seat shall be treated for rust prevention.
5.2.7 The paint coating of the traction seat shall comply with the relevant provisions of TQ4 in QC/T 484-1999.
5.2.8 The traction seat plate should be made of Q345 steel.
5.3 Performance requirements
5.3.1 The longitudinal swing angle of the traction seat plate should be no less than 12° with respect to the horizontal plane, see Figure 1.
5.3.2 The lateral swing angle of the single-axis traction seat plate should be no more than 3° with respect to the horizontal plane, and the damping sleeve should be provided at the rotating shaft;
The lateral swing angle of the seat plate should be no less than 3° and not more than 7° with respect to the horizontal plane, and a buffer device should be added on the left and right sides; rubber bearing
The lateral swing angle of the lead is not more than 5° with respect to the horizontal plane.
5.3.3 Manual separation of the traction lock hook and the traction pin should be convenient. The handle of the drawbar is set to the right of the vehicle's driving direction, and its lever operating force is 50.
The traction seat should be no more than 450N, the No. 90 traction seat should be no more than 500N; its locking restoring force No. 50 traction seat should be no less than 400N.
No. 90 traction seat should be no less than 450N.
5.3.4 The rated bearing capacity of No. 50 traction seat is 20t, and its D value should be no less than 152kN; the rated bearing quality of No. 90 traction seat is 30t.
The D value should be no less than.200kN, and the D value is determined according to GB/T 20069.
5.3.5 After the traction and separation pins have been separated and engaged for 15,000 times, the functions required by 5.1.5, 5.1.6 and 5.3.3 shall be intact.
5.3.6 The strength requirements and test methods of the traction seat shall comply with the provisions of GB/T 20069.
6 Test methods
6.1 Test method for separation and joint of traction seat and traction pin
6.1.1 Test on a dedicated test bench.
6.1.2 The installation of the traction seat and the traction pin should be firm, and the surface of the traction pin and the moving mechanism in the traction seat should be coated with a proper amount of lubricating grease.
6.1.3 When the traction seat is in the pre-suspended state, the traction pin shall enter the traction seat at a speed of 0.5m/s to 1.5m/s.
6.1.4 When the traction seat is in the unhooked state, the traction pin shall be disengaged from the traction seat at a speed of 0.5m/s to 1.5m/s.
6.1.5 Repeat steps 6.1.3 and 6.1.4, the number of cycles is 15000, and the frequency does not exceed 2Hz.
6.2 Pulling rod handle handle tension and locking recovery force test method
6.2.1 Test on a 6.1 bench using a force gauge.
6.2.2 Measure the tension of the lever handle and the restoring force of the bolt before performing the 6.1 test.
6.2.3 Measure the tension of the lever handle and the restoring force of the bolt after the 6.1 test.
6.2.4 The force measured in accordance with the methods of 6.2.2 and 6.2.3 shall meet the requirements of 5.2.1, 5.3.3 and 5.3.5.
7 Inspection rules
7.1 Factory inspection
7.1.1 The traction seat shall be inspected by the quality inspection department of the manufacturer, and the product certificate shall be issued before leaving the factory.
7.1.2 The factory inspection items are as follows.
a) appearance;
b) 5.1.3, 5.1.4, 5.1.5, 5.1.6, 5.2.6, 5.3.1 and 5.3.2 of this standard.
7.2 Type inspection
7.2.1 Type inspection of products should be carried out in one of the following cases.
a) Stereotype identification of new or old products to the factory;
b) After formal production, if there are major changes in structure, materials and processes; it may affect product performance;
c) normal production every two years or when the output exceeds 20,000 units;
d) When the product is discontinued for more than one year, when the production is resumed;
e) When the quality supervision agency requests the type inspection.
7.2.2 The type inspection item is the entire content of Chapter 5.
7.2.3 The type of the traction seat shall be randomly selected from the products that have passed the factory inspection. The sampling base shall be not less than 100 sets, and the sampling number shall be
3 sets.
7.2.4 When any one of the type inspections fails, the sample is allowed to be doubled and the item is re-examined. If the re-qualification is passed, the batch is produced.
The product is judged as qualified, otherwise it is unqualified.
8 Marking, transportation and storage, product accompanying documents
8.1 mark
8.1.1 Each lead bracket shall be installed with a signage and meet the relevant requirements of GB/T 13306.
8.1.2 The contents of the signage shall include.
a) the name of the manufacturing company;
b) specifications and models;
c) the maximum total mass allowed;
d) the factory number;
e) Date of manufacture.
8.2 Transportation and storage
During the transportation and storage process, the traction seat should be protected from mechanical damage; when it is stored for a long time, effective measures such as rain, moisture and rust should be taken.
And carry out maintenance according to the instructions in the instruction manual.
8.3 Product accompanying documents
Product accompanying documents should include.
a) product certification;
b) The product manual, its basic requirements and preparation methods should comply with the relevant provisions of GB/T 9969.