This standard specifies the technical requirements, test methods, inspection rules, packaging, transportation, etc. of engineering machinery headlamps. JB/T 7694-1995 Engineering machinery headlamps JB/T7694-1995 Standard download decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
JB/T769495
Construction Machinery
Published on 1995-06-20
Headlight
Implementation on 1996-01-01
Ministry of Machinery Industry of the People's Republic of China
Machinery Industry Standard of the People's Republic of China
Construction Machinery
1 Subject Content and Scope of Application
Headlight
JB/T 7694—95
This standard specifies the technical requirements, test methods, inspection schedule, packaging, transportation, etc. of the headlights of construction machinery (hereinafter referred to as headlights). This standard applies to headlights for crawler-type and tire-type construction machinery, and can also be used as a reference for rear lights and work lights. 2 Reference standards
GB 2423.2
GB 2423.5
GB2423.10
GB2828
3 Technical requirements
Basic environmental test procedures for electric and electronic products Test A: Low temperature test method
Basic environmental test procedures for electric and electronic products Test B: High temperature test method Test Ea: Impact test method
Basic environmental test procedures for electric and electronic products Basic environmental test procedures for electric and electronic products Test Fc: Vibration (sinusoidal) test method Batch inspection counting sampling procedures and sampling tables (applicable to continuous batch inspection) Engineering machine headlamps should be manufactured in accordance with the drawings and technical documents approved by the prescribed procedures and comply with the provisions of this standard. The basic parameters of the headlights should comply with the provisions of Table 1. The shape and basic dimensions should refer to the provisions of Figure 1. Table 1
Rated voltage
Approved by the Ministry of Machinery Industry on 1995-06-20
Rated value
Limit value
Measuring point
Luminous intensity cd
Minimum value
Implemented on 1996-01-01
3.3 Surface quality
JB/T 7694-95
3.3.1 The outer surface of the headlight shall be free of defects such as convexo-concave, cracks, wrinkles, etc. The paint layer shall be uniform in color, free of bubbles and firmly attached, without orange peel and sagging.
3.3.2 There shall be no cracks on the hoop, and the rubber parts shall be free of defects such as cracks and deformation. The surface of the welded parts shall be smooth and the connection shall be firm. 3.4 Performance
3.4.1 Electrical Performance
The rated power and rated voltage of the headlight shall comply with the provisions of Table 1. The filament shall be firmly connected and can be lit smoothly when powered on. 3.4.2 Insulation Performance
The insulation resistance between the live part of the headlight and the lamp housing shall be above 1MO (after the water resistance test, it shall be above 0.5MQ). 3.4.3 Light Distribution Performance
The luminous intensity of the headlight shall comply with the provisions of Table 2. The measurement points are shown in Figure 2. Table 2
Measurement point
10U-10R
10U-10L
10U-20R
10U-20L
5U-10R
5U-10L
5U-20R
3.4.4 Temperature resistance
Small luminous intensity
Measurement point
5U-20L
5D-10L
5D-10R
3530252015105||tt ||Minimum luminous intensity
Measurement point
5D-20L
5D-20R
10D-10L
10D-10R
10D-20L
10D-20R
101520253035
Angle (\)
Minimum luminous intensity
The headlights should work normally in low temperature = 40℃ and high temperature 50℃ environment. The bulbs should not burst or leak. The rubber parts should not soften, deform or crack.
3.4.5 Vibration resistance
JB/T7694—95
3.4.5.1 The headlights shall be able to withstand the sweep frequency vibration and fixed frequency vibration tests in the three directions of up and down, left and right, and front and back as specified in Article 4.5. They shall work normally during and after the test. The bulbs shall not be broken or stagnant. The parts shall not be deformed, loose, fall off, or broken. 3.4.5.2 Headlights shall be classified according to the provisions of Table 3. Table 3
3.4.6 Impact resistance
Vibration state
Mainly tracked type Installed at the front of the vehicle Mainly tire type Installed around the driver's cab Headlights shall be able to withstand the impact test specified in Article 4.6: They shall work normally during and after the test. The lamp filters shall not be broken or leaking. The parts shall not be deformed, loose, fall off, or broken. 3.4.7 Water resistance performance
After the lamp has been subjected to the water spray test for 1 hour, there shall be no residual water of more than 2mL inside the lamp, the inner surface of the reflector shall not darken, and the performance requirements of 3.4.1.3.4.2 and 3.4.3 shall be met. 4 Test method
Test conditions
The test voltage and working state must comply with the provisions of Table 4. Table 4
Rated voltage V
Test voltage
Working state
Continuous lighting
4.1.2 The equipment for the temperature resistance test, vibration resistance test and impact resistance test shall comply with the provisions of GB2423.1, GB2423.2, GB2423.10 and GB2423.5 respectively.
4.2 Insulation resistance test
Use a 500V high resistance meter to measure the resistance between the terminal and the lamp holder. 4.3 Light distribution test
Luminous intensity should be measured at the measuring point specified in 3.4.3. The lamp to be tested should be placed 10m away from the screen, and the geometric axis of the lamp should pass through the HV point.
Heat resistance test
Place the lamp in the test box (room) in normal working state and conduct the temperature resistance test according to the provisions of Table 5. After the high temperature (or low temperature) test, the sample should be placed at room temperature for 1h, and then the low temperature (or high temperature) test should be carried out. Table 5
Ambient orange degree C
-40±3
4.5 Vibration resistance test
Test time h
This test should be carried out on the grip test bench specified in 4.1.2. 4.5.1
First, obtain the resonance point according to the provisions of Table 6.
Around medical temperature
Test time
Vibration rate Hz
JB/T7694-95
Sweep frequency period min
Acceleration m/s*
When there is no resonance point, the vibration durability test shall be carried out according to the provisions of Table 7. Table 7
Acceleration frequency HzbZxz.net
Acceleration m/s
Amplitude (maximum)
Test time
Note: If the vibration rate is very different from the actual vehicle, the value can be changed to make it close to the actual vehicle's vibration rate. Left and right
4.5.3 If there is a resonance point, the test shall be carried out for 0.5h each for up and down, left and right, and front and back according to the full amplitude specified in the resonance point and Figure 3 and Figure 4, and then the test specified in Table 8 shall be carried out.
According to the rated rate 66.6Hz
16.7 33.3 66.7167333667
Rated vibration rate Ha
4.6 Impact test
Vibration frequency Hz
Vibration speed 166.7Hz
16.7 33. 3 66.7 166.7 333
Vibration frequency Hz
Vibration acceleration m/s*
This test shall be carried out on the impact test bench specified in 4.1.2 in accordance with the provisions of Table 9. Table 9
Acceleration m/s?
Pulse duration
Test time
Number of impacts (lighting)
4.7 Water test
JB/T 7694 95
Install the lamp in the test device shown in Figure 5. The test piece rotates at a speed of 17r/min in a direction of 45° around the plumb line. The water nozzle sprays water outward at a pressure of 98kPa. The spraying time is 30min. After the test, place it for 1h. Water pipe
Inspection rules
5.1 Factory inspection
Vertical axis
12.512.502.5
Each lamp must be inspected and qualified by the inspection department of the manufacturer before it can be shipped. The factory inspection items include electrical performance, basic dimensions and surface quality.
5.2 Type inspection
5.2.1. The items for type inspection of headlights shall be in accordance with the provisions of Table 10, and the sampling inspection shall be in accordance with the provisions of GB2828. A secondary sampling plan shall be adopted. The general inspection level and qualified quality level shall be in accordance with the provisions of Table 10 or determined by the supplier and the buyer. The sampling plan shall be determined according to the number of batches of headlights to be inspected. 5.2.2 During the inspection, if the number of unqualified items in each item is equal to or less than the corresponding qualified judgment number A., ​​the batch of products shall be accepted, otherwise it shall be rejected. Table 10
Marking, packaging, storage and transportation
Each headlight shall be marked with:
Rated voltage
Rated power;
Inspection items
Electrical performance
Insulation performance
Light distribution performance
Vibration resistance
Impact performance
Water resistance
Surface quality
Outline dimensions
Manufacturer name and product model.
6.2 The outer surface of the packaging box of each headlight shall be marked with: Manufacturer name and factory logo;
Product name and product model:
Manufacture year and month.
JB/T7694-95
6.3Put the packaging box into a box with protective fillings. The outer wall of the box should be marked with: a.
Name and address of the consignee:
Product name, specifications and quantity:
Name and address of the consignor;
Marks such as anti-pressure, anti-vibration, anti-drenching, and handle with care. 6.4Documents accompanying the packing should include packing list, product certificate, and product manual. The packed headlights should be placed in a ventilated and dry room and should not be subject to gradual, heavy pressure, collision, or corrosion by acid or alkali substances. 6.5
7Warranty period
If the headlights are damaged or cannot work properly due to poor manufacturing within 12 months from the date of delivery (based on the date of the delivery note) under normal use and maintenance by the user, the manufacturer shall be responsible for free repair or replacement. Additional Notes:
This standard was proposed and managed by Tianjin Engineering Machinery Research Institute of the Ministry of Machinery Industry. This standard was drafted by Tianjin Engineering Machinery Research Institute of the Ministry of Machinery Industry. The main drafters of this standard are Yang Cheng,
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