JB/T 7234—2001 This standard is a revision of JB/T 7234—1994 "General Technical Conditions for Four-wheeled Agricultural Transport Vehicles". During the revision, safety technical requirements were supplemented; some technical performance indicators were adjusted; and inspection rules were refined. This standard specifies the technical requirements, test methods, inspection rules, delivery, marking, transportation and storage of four-wheeled agricultural transport vehicles. This standard applies to four-wheeled agricultural transport vehicles. This standard was first issued in July 1994, and this is the first revision. JB/T 7234-2001 General Technical Conditions for Four-wheeled Agricultural Transport Vehicles JB/T7234-2001 Standard download decompression password: www.bzxz.net

ICS43.160
Machinery Industry Standard of the People's Republic of China
JB/T7234-2001
Four-wheel agricultural al vehidlesGeneral specifications2001-06-04Promulgated
China Machinery Industry Federation
2001-10-01Implementation
JB/T7234—2001
This standard is a revision of B/T7234—1994 "Four-wheel agricultural al vehidlesGeneral specifications". Compared with JB/T7234—1994, the main technical content of this standard has been changed as follows: safety technical requirements have been supplemented;
Some technical performance indicators have been adjusted to adapt to the current status of the product; and the provisions of the inspection rules have been refined.
This standard replaces B/T
7234-1994 from the date of implementation.
This standard is proposed and managed by the National Agricultural Transport Vehicle Standardization Technical Committee. The responsible drafting units of this standard are: National Agricultural Machinery Quality Supervision and Inspection Center, Beiqi Foton Vehicle Co., Ltd., FAW Jinbei Vehicle Manufacturing Group Co., Ltd., Shandong Shifeng (Group) Co., Ltd., Sichuan Highway Machinery Factory. The main drafters of this standard are: Jin Suofang, Shi Tongjun, Wang Xiwen, Chi Jianmei, Weng Li, Yuan Jun. The cost standard was first issued in July 1994, and this is the first revision. I
1 Scope
Machinery Industry Standard of the People's Republic of China
Four-wheel agricultural vehicles-General technical conditions
Four-wheel agricultural vehicles-General specificatiansJB/T7234—2001
Replaces JB/T7234—1994
This standard specifies the technical requirements, test methods, inspection rules, delivery, marking, transportation and storage of four-wheel agricultural vehicles. This standard applies to four-wheel agricultural vehicles (hereinafter referred to as four-wheel vehicles). 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard was published, the versions shown were all valid. All standards are subject to revision. Parties using this standard should explore the possibility of using the latest versions of the following standards: GB/T2828—1987
GB 4785—1998
GB 7454—1987
GB18320—2001
GB 18321—2001
JB/T 6712—1993
JB/T 7235—1994
JB/T 7736—1995
JB/T98322—1999
3 Technical requirements
General requirements
Batch inspectionCount sampling procedures and sampling tables (applicable to inspection of continuous batches)Regulations on the installation of external lighting and signal devices of motor vehicles and trailersTechnical regulations on the use and beam adjustment of motor vehicle headlampsSafety technical requirements for agricultural transport vehicles
Noise limits for agricultural transport vehicles
Appearance quality requirements for tractors
Test methods for four-wheeled agricultural transport vehicles
Reliability assessment of four-wheeled agricultural transport vehicles
Determination method of paint film adhesion performance of agricultural and forestry tractors and implementsPressure cutting method3.1.1 Four-wheeled vehicles shall be manufactured in accordance with product drawings and technical documents approved through prescribed procedures3.1.2 The components and accessories of four-wheeled vehicles shall comply with the provisions of relevant standards and may only be assembled after passing the inspection. 3.1.3 All parts and components connected by fasteners of four-wheeled vehicles shall be connected reliably as required and shall not be loose. The tightening torque of fasteners in important parts shall comply with the provisions of product drawings or instruction manuals. 3.1.4 The appearance quality of paint, forgings, welded parts, metal plating, etc. of four-wheeled vehicles shall comply with the provisions of JB/T6712. 3.1.5 The minimum ground clearance of four-wheeled vehicles shall not be less than 160mm. 3.1.6 Four-wheeled vehicles shall not leak oil or water.
3.1.7 The maximum operating force of each main operating mechanism shall comply with the provisions of Table 1, and the adjustment of pedal travel shall comply with the provisions of the instruction manual. All automatic return operating handles and pedals shall be able to automatically reset after the operating force is removed. 3.1.8 The front row of seats in the cab is approved. If the interior width of the cab (the lower edge of the cab door and window, measured on the inside of the rear pillar of the door) is equal to or greater than 1200mm, it is approved for 2 people. If it is equal to or greater than 1550mm, it is approved for 3 people (including the driver's seat). 3.1.9 The specific power of a four-wheel vehicle should not be less than 4.0kW/t. Approved by China Machinery Industry Federation on June 4, 2001, and implemented in 2001-1001
Name of operating mechanism
Tangential operating force of steering wheelbzxZ.net
Service brake
Parking brake
Clutch pedal force
Hydraulic lifting clutch handle operating force
7234—2001
Hand operation
Foot operation
Hand operation
Foot operation
Maximum operating force
The body of a four-wheeled vehicle should be straight, and the height difference between the left and right symmetrical parts of the outer edge of the body should not exceed 40mm. The cab of a four-wheeled vehicle should not leak.
The steering wheel of a four-wheeled vehicle should be flexible, easy to operate, and without obstruction. A steering limit device should be set on a four-wheeled vehicle. During the steering process of the wheel, there should be no interference with other components. The steering wheel of a four-wheel vehicle should be able to automatically return to its original position after turning, so that the vehicle has the ability to travel in a stable straight line. 3.1.13
3.1.14 When a four-wheel vehicle is driving on a flat, hard, dry and clean road, it shall not deviate, and its steering wheel shall not have shimmy, poor road feel or other phenomena.
3.1.15 The tire model and pattern on the same axle shall be the same and shall be compatible with the tire used for the maximum design speed. The tire load shall not exceed the rated load of the tire (the rear axle can be equipped with dual tires). 3.1.16 The lateral swing and radial runout of the wheel assembly of a four-wheel vehicle shall not exceed 8mm. The technical performance of the generator of a four-wheel vehicle shall be good. The battery shall be able to maintain normal voltage. 3.1. 17
3.2 Safety requirements
3.2.1 External dimensions, maximum design speed and maximum design gross mass The external dimensions, maximum design speed and maximum design gross mass of four-wheel vehicles shall comply with the provisions of 3.3 of GB18320-2001. 3.2.2 Cab interior space
The safety requirements for the cab interior space shall comply with the provisions of 5.2.1 of GB18320-2001. 3.2.3 Seat
The safety requirements for the driver's seat shall comply with the provisions of 5.2.2 of GB18320-2001. 3.2.4 Steering wheel
The safety requirements for the steering wheel shall comply with the provisions of 5.2.3 of GB18320-2001. 3.2.5 Control mechanism
The safety requirements for the control mechanism shall comply with the provisions of 5.2.4 of GB18320-2001. 3.2.6 Access to and from the cab
Access to and from the cab shall comply with the provisions of 5.2.5 of GB18320-2001. 2
3.2.7 Doors and windows
JB/T7234-2001
The safety requirements for doors and windows shall comply with the provisions of 5.2.6 of GB18320-2001. 3.2.8 Cab interior materials
Cab interior materials shall comply with the provisions of 5.2.7 of GB18320-2001. 3.2.9 Vehicle stability
3.2.9.1 Rear overhang shall comply with the provisions of 5.3.1 of GB18320-2001. 3.2.9.2 Steering axle load mass shall comply with the provisions of 5.3.2 of GB18320-2001. The roll stability angle shall comply with the provisions of 5.3.3 of GB18320-2001. 3.2.9.3
3.2.10 Starting switch and throttle control mechanism The starting switch and throttle control mechanism shall comply with the provisions of 5.4.1 of GB18320-2001. 3.2.11 Steering system
3.2.11.1 The position of the steering wheel shall comply with the provisions of 5.4.2.1 of GB18320-2001. 3.2.11.2 The maximum free rotation of the steering wheel shall comply with the provisions of 5.4.2.2 of GB18320-2001. 3.2.11.3 The steering wheel limit device shall comply with the provisions of 5.4.2.3 of GB18320-2001. 3.2.11.4 The lateral slip amount shall comply with the provisions of 5.4.2.4 of GB18320-2001. 3.2.11.5 The understeering characteristics shall comply with the provisions of 5.4.2.5 of GB183202001. 3.2.12 Braking system
The driving and parking brake systems shall comply with the provisions of 5.4.3.1 and 5.4.3.3 of GB18320-2001. 3.2.12.1 Driving brake performance
The driving brake performance under the specified test conditions shall comply with the provisions of 5.4.3.4 of GB18320-2001. 3.2.12.2 Parking brake performance
The parking brake performance under the specified test conditions shall comply with the provisions of 5.4.3.5 of GB18320-2001. 3.2.13 Traveling system
The safety requirements of the traveling system shall comply with the provisions of 5.4.4 of GB18320-2001. 3.2.14 Transmission system
The safety requirements of the transmission system (except the control force requirements) shall comply with the provisions of 5.4.5 of GB18320-2001. 3.2.15 Self-unloading device
The safety requirements of self-unloading device shall comply with the provisions of 5.4.6 of GB18320-2001. 3.2.16 Lighting signal device and other electrical equipment 3.2.16.1 The lamps of four-wheel vehicles shall be installed securely, intact and effective, and shall not become loose, damaged, lose their function or change the direction of illumination due to the vibration of the vehicle. All light switches shall be installed securely and open and close freely, and shall not open and close automatically due to the vibration of the vehicle. The switch position shall be convenient for the driver to operate.
3.2.16.2 The number, position, light color and other requirements of the external lighting and signal devices of four-wheeled vehicles are shown in Table 2. 3
Name of lighting and signal devices
Headlamp
Front position lamp
Rear position lamp
Front turn lamp
Rear turn lamp
Brake lamp
License plate lamp
Hazard warning flasher
Reversing lamp
Rear reflector
T7234-2001|| tt||At least 1
At least 1
Determined by the enterprise with reference to the relevant provisions of GB4785
amber
amber
3.2.16.3 When inspecting the low beam irradiation position of the headlamp of a four-wheeled vehicle, the height of the light beam cut-off line corner or midpoint should be 0.6H~0.8H (H is the reference center height of the headlamp) at a distance of 10m from the screen, and its horizontal position should not deviate more than 100mm to the left or right. For the adjustment of the high beam single beam headlamp of the four-lamp system, the height of the beam center from the ground on the screen is required to be 0.85H0.9H, and the horizontal position requires that the left lamp should not deviate more than 100mm to the left and not more than 170mm to the right; the right lamp should not deviate more than 170mm to the left or right. When using high beam and low beam dual beam lamps, the low beam is mainly adjusted. For lamps that can only adjust to a high-beam single beam, adjust the high-beam single beam.
3.2.16.4 The luminous intensity of the high-beam beam of each headlamp of a four-wheeled vehicle shall comply with the provisions of 5.5.2 of GB18320-2001. 3.2.16.5 The configuration requirements of high-beam and low-beam lamps shall comply with the provisions of 5.5.3 of GB18320-2001. 3.2.16.6 Hazard warning flashers and turn signal lamps shall comply with the provisions of 5.5.4 of GB18320-2001. 3.2.16.7 When four-lamp headlamps are installed side by side, the pair installed on the outside shall be a high-beam and low-beam double-beam lamp, and the pair installed on the inside shall be a high-beam single-beam lamp.
The indicator lights on the instrument panel shall comply with the provisions of 3.2.16.8 in Section 555 of GB18320-2001
3.2.16.9The requirements for instrument lights shall comply with the provisions of 5.5.6 in GB18320-2001. 3.2.16.10The requirements for the opening and closing and lighting of the front position lights, rear position lights, license plate lights and instrument lights shall comply with the provisions of 5.5.7 in GB18320-2001. 3.2.16.11The brightness of the turn signal lights, rear license plate lights, hazard warning flashers, rear position lights and brake lights shall comply with the provisions of 5.5.8 in GB18320-2001.
3.2.16.12The horn shall comply with the provisions of 5.5.9 in GB18320-2001. Instruments and meters shall comply with the provisions of 5.5.10 in GB18320-2001. 3.2.16.13
Safety protection
3.2.17.1 The rearview mirror shall comply with the provisions of 5.6.1 of GB18320-2001. 3. 2. 17. 2
The front windshield wiper shall comply with the provisions of 5.62 of GB18320-2001. 4
JB/T7234-2001
3.2.17.3 The front bumper shall comply with the provisions of 5.6.3 of GB18320-2001. 3.2.17.4 When the ground clearance of the rear end of the vehicle is greater than 700mm, the protection shall comply with the provisions of 5.6.4 of GB18320-2001. 3.2.17.5 The height of the safety frame at the front of the vehicle shall comply with the provisions of 5.6.5 of GB18320-2001. 3.2.17.6 All wheels must have mudguards. 3.2.17.7 Protection of dangerous moving parts shall comply with the provisions of 5.66 of GB18320-2001 3.2.17.8 Requirements for safety protection devices and safety distances shall comply with the provisions of 5.6.8 of GB18320-2001 3.2.18 Hydraulic, fuel and lubrication systems
Safety requirements for hydraulic, fuel and lubrication systems shall comply with the provisions of 5.7 of GB18320-2001. 3.2.19 Thermal protection
Thermal protection shall meet the provisions of 5.8 of GB18320-2001 3.2.20 Electrical requirements
3.2.20.1 Battery installation and protection shall comply with the provisions of 5.9.1 of GB18320-2001. 3.2.20.2 The protection of electrical wires shall comply with the provisions of 5.9.2 of GB18320-2001. 3.2.20.3 The overload protection of circuits shall comply with the provisions of 5.9.3 of GB18320-2001. 3.3 Usage Information
3.3.1 The factory logo or trademark and model logo of four-wheeled vehicles shall comply with the provisions of 7.1.1 of GB18320-2001. 3.3.2 The installation and content of product labels shall comply with the provisions of 7.1.2 of GB18320-2001. 3.3.3 The frame number or vehicle identification code shall comply with the provisions of 7.1.3 of GB18320-2001. 3.3.4 The license plate (frame) shall comply with the provisions of 7.14 of GB18320-2001. 3.3.5 Graphic signs of control parts, indicators and signal devices shall comply with the provisions of 7.2 of GB18320-2001. 3.3.6 Safety signs of four-wheel vehicles shall comply with the provisions of 7.3 of GB18320-2001. 3.3.7 The instruction manual shall comply with the provisions of 7.4 of GB18320-2001. The instructions must include safety precautions, safety signs and their locations, product label locations and vehicle frame number or vehicle identification code (V) location. 3.3.8 The speedometer error range is +20/~-5%. That is: when the actual vehicle speed is 40km/h, the speedometer indication range is 38~48km/h3.4 Main performance requirements
3.4.1 The rated power of the engine shall be 1h power. After the four-wheel vehicle is run-in as required, the rated power shall comply with the provisions of the instruction manual, with a tolerance of ±5%.
3.4.2 The lowest stable speed of a four-wheeled vehicle in the highest gear should not be greater than 40% of the theoretical speed of the highest gear. 3.4.3 The maximum climbing gradient of a four-wheeled vehicle should not be less than 25% (not less than 20% for a rated load less than 1.0t). 3.4.4 When a four-wheeled vehicle is fully loaded and glides out of gear on a flat, dry concrete or asphalt road, the straight-line gliding distance at an initial speed of 30km/h should not be less than 165m.
3.4.5 The minimum turning circle diameter of a four-wheeled vehicle should not be greater than 15m. 3.4.6 The average fuel consumption of a four-wheeled vehicle in six working conditions at constant speed should not be greater than 28L/(t·100km). 3.4.7 The low-temperature starting performance of a four-wheeled vehicle should be able to start smoothly at the following ambient temperatures: a) 0℃ for a diesel engine started by hand;
b) -5℃ for a diesel engine started by electricity.
3.4.8 The dump truck compartment should be able to be raised, lowered or stopped at any position smoothly, and the maximum tilt angle should not be less than 45°. When the engine is running at the rated speed, the time for the fully loaded compartment to be lifted to the maximum tilt angle (without unloading) should not exceed 20s. 5
JB/T7234—2001
When overloaded by 10%, it stays for 5 minutes when lifted to 20°, and the self-lowering amount of the compartment is not more than 5%. The dump truck compartment should be able to return to its original position accurately after being lifted.
3.5 Environmental protection requirements
3.5.1 The noise of four-wheel vehicles should comply with the provisions of GB18321. 3.5.2 The exhaust of four-wheel vehicles should comply with the provisions of 5.11 of GB18320—2001. 3.6 Reliability
3.6.1 The mean trouble-free mileage (MTBF) of four-wheeled vehicles shall not be less than 2500km. 3.6.2 The comprehensive trouble-free score (Q) of four-wheeled vehicles shall not be less than 65 points. 3.6.3 The braking performance and environmental pollution value of four-wheeled vehicles after the reliability test shall meet the national quality indicators for in-use vehicles. 4 Test methods
4.1 The dimensions and mass parameters, power performance, main engine performance indicators, fuel economy, sliding performance, handling performance, braking performance, starting performance, dump truck dump performance, environmental pollution measurement and cab rainproof sealing of four-wheeled vehicles shall be inspected in accordance with the provisions of B 7235.
4.2 The inspection of headlights shall be carried out in accordance with the provisions of GB7454. 4.3 Inspection of oil leakage When the continuous driving distance of the four-wheeled vehicle is not less than 10km, observe after parking for 5 minutes, and there shall be no obvious leakage. Leakage inspection When the engine is running or stopped, the water tank, water pump, cylinder block, cylinder head, heating device and all connecting parts shall not have obvious water leakage.
4.4 The appearance quality of the four-wheeled vehicle shall be inspected by visual inspection, and the paint film adhesion performance shall be inspected in accordance with the provisions of B/T9832.2. 4.5 The inspection of the safety items of the four-wheeled vehicle shall be carried out in accordance with the provisions of Chapter 6 of GB18320-2001. 4.6 The reliability test of the four-wheeled vehicle shall be carried out in accordance with the provisions of JB/T7736 or other relevant regulations. 4.7 Other items shall be inspected by visual inspection or other conventional methods. 5 Inspection rules
The inspection types of four-wheeled vehicles are divided into factory inspection and type inspection. 5.1 Factory inspection
5.1.1 Each four-wheeled vehicle must pass the inspection before it can leave the factory, and it must be accompanied by documents or marks proving the quality of the product. 5.1.2 For the factory inspection of four-wheeled vehicles, at least all items with "√" in Table 3 shall be inspected. All items must be qualified before the certificate of conformity can be issued and shipped.
5.2 Type inspection
5.2.1 The manufacturer shall conduct type inspection in one of the following situations: a) Finalization and appraisal of new products;
b) Trial and finalization and appraisal of old products produced in different places or transferred to other factories: after formal production, if there are major changes in structure, materials, and processes, which may affect product quality; ① When the product is discontinued for more than one year and production is resumed; e) When the factory inspection results are significantly different from the last type inspection results; ) Quality monitoring under normal production conditions (reliability tests should be conducted at least once every three years, and inspections of other items should be conducted at least once a year).
5.2.2 Inspection items
JB/T7234—2001
The inspection items are all the test items listed in this standard, see Table 3. a) Type inspection requires two prototypes, one of which is inspected for performance and assembly quality, and then subjected to reliability test together with the other prototype. b)~e) type inspection requires 2 prototypes, both of which are tested for performance, assembly quality and reliability. f) type inspection requires 2 prototypes, both of which are tested for performance, assembly quality and reliability at specified intervals.
Classification of non-conformities
All inspected items that do not meet the requirements specified in Chapter 3 are called non-conformities (defects), which are classified into Class A non-conformities, Class B non-conformities and Class C non-conformities according to their importance in affecting product quality characteristics. The names of the items are shown in Table 3. Non-conformities of Class A items are called Class A non-conformities, and the rest are analogous.
Project name
Maximum design speed,
Maximum design total mass
External dimensions,
Safety requirements for the interior space of the cab
Safety requirements for driver's seat
Safety requirements for steering wheel
Safety requirements for operating mechanism
Access to and from the cab
Safety requirements for doors and windows
Interior materials of the cab
Steering shaft load
Roll stability angle
Start switch and throttle control mechanism
Steering wheel position
Maximum free rotation of the steering wheel
Steering wheel limit device
Lateral sideslip
Understeering characteristics
Safety requirements for braking system
Service braking performance
Parking brake performance
Safety requirements for running system
Safety requirements for transmission system
Safety requirements for dump device
Requirements for installation and switch of lamps
Requirements for quantity, position, light color, etc. of external lighting and signal devicesLuminous intensity of high beam of headlamp
Corresponding clause number
Factory inspection
Type inspection2 Inspection Items
JB/T7234—2001
The inspection items are all the test items listed in this standard, see Table 3. Type a) type of type inspection requires two prototypes, one of which is tested for performance and assembly quality, and then subjected to reliability test together with the other prototype. Type b)~e) types of type inspection requires two prototypes, both of which are tested for performance, assembly quality and reliability. Type f) type of type inspection requires two prototypes, both of which are tested for performance, assembly quality and reliability according to the prescribed cycle.
Classification of Non-conformance
All inspected items that do not meet the requirements specified in Chapter 3 are called non-conformance (defects), and are classified into Class A non-conformance, Class B non-conformance and Class C non-conformance according to the importance of their impact on product quality characteristics. The names of the items are shown in Table 3. Non-conformance of Class A items is called Class A non-conformance, and the rest are analogous.
Project name
Maximum design speed,
Maximum design total mass
External dimensions,
Safety requirements for the interior space of the cab
Safety requirements for driver's seat
Safety requirements for steering wheel
Safety requirements for operating mechanism
Access to and from the cab
Safety requirements for doors and windows
Interior materials of the cab
Steering shaft load
Roll stability angle
Start switch and throttle control mechanism
Steering wheel position
Maximum free rotation of steering wheel
Steering wheel limit device
Lateral sideslip
Understeering characteristics
Safety requirements of braking system
Service braking performance
Parking brake performance
Safety requirements of running system
Safety requirements of transmission system
Safety requirements of dump device
Requirements for installation and switch of lamps
Requirements for quantity, position, light color, etc. of external lighting and signal devicesLuminous intensity of high beam of headlamp
Corresponding clause number
Factory inspection
Type inspection2 Inspection Items
JB/T7234—2001
The inspection items are all the test items listed in this standard, see Table 3. Type a) type of type inspection requires two prototypes, one of which is tested for performance and assembly quality, and then subjected to reliability test together with the other prototype. Type b)~e) types of type inspection requires two prototypes, both of which are tested for performance, assembly quality and reliability. Type f) type of type inspection requires two prototypes, both of which are tested for performance, assembly quality and reliability according to the prescribed cycle.
Classification of Non-conformance
All inspected items that do not meet the requirements specified in Chapter 3 are called non-conformance (defects), and are classified into Class A non-conformance, Class B non-conformance and Class C non-conformance according to their importance to the product quality characteristics. The names of the items are shown in Table 3. Non-conformance of Class A items is called Class A non-conformance, and the rest are analogous.
Project name
Maximum design speed,
Maximum design total mass
External dimensions,
Safety requirements for the interior space of the cab
Safety requirements for driver's seat
Safety requirements for steering wheel
Safety requirements for operating mechanism
Access to and from the cab
Safety requirements for doors and windows
Interior materials of the cab
Steering shaft load
Roll stability angle
Start switch and throttle control mechanism
Steering wheel position
Maximum free rotation of the steering wheel
Steering wheel limit device
Lateral sideslip
Understeering characteristics
Safety requirements for braking system
Service braking performance
Parking brake performance
Safety requirements for running system
Safety requirements for transmission system
Safety requirements for dump device
Requirements for installation and switch of lamps
Requirements for quantity, position, light color, etc. of external lighting and signal devicesLuminous intensity of high beam of headlamp
Corresponding clause number
Factory inspection
Type inspection
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