Some standard content:
ICS 53.080
Machinery Industry Standard of the People's Republic of China
JB 9229.1-9229.3--1999
Scissors elevating platforms
Published on 1999-06-28
National Machinery Industry Bureau
2000-01-01 implementation
JB/T9229.3—1999
This standard is a modification of 2BJ83003.2—87 Scissors lift platform: the main technical content has not changed. This standard replaces Z83003.2—? from the date of implementation. The appendix of this standard is the special record of the standard. This standard is proposed and managed by Beijing Hoisting and Conveying Machinery Research Institute. This standard was drafted by Beijing Hoisting Machinery Research Institute. The main contributors to this standard are Liu Na, Ma Lianfen and Zhang Jingxiang. EK
Test method, revision, the original standard was edited during the revision ■ Yanwei
Machinery Industry Standard of the People's Republic of China
Scissors efevsting plattorms-Testing methadJBT 9229.3-1999
This standard applies to the shear lift platform (hereinafter referred to as the movable lift platform) specified in JBT9229.1. Regarding chassis tests, for the modified vehicles with standard vehicle chassis, the driving performance of the original chassis should not be changed after modification. This standard stipulates its unique performance test and only stipulates the test method of non-standard chassis. 2 Reference standards
The following standards contain provisions that constitute the provisions of this standard by being cited in this standard. When this standard is published, the versions shown are valid. All standards are subject to revision. Parties using this standard should consider using the latest versions of the following standards. GBTi496—1979
GB.T 50081991
GB./T 7403--1987
JB.T9229.1—1999
JB/T9224.2—1999
3 Preparation before the test
3. Acceptance of the test camel lift
Motor vehicle deep sound measurement square gear
Starting auxiliary acid battery
Lead-acid replacement battery for traction
Aiwu lift table type and basic number
Scissor type Technical requirements for lifting platform
3.1.1 Register product certificate, manufacturer name, product model, factory number, factory expiration date, etc. 3.1.1 The original dimensions of the disassembled parts are listed in Table A1. 31.3 The test prototype should be equipped with the following technical documents (provided by the manufacturer): a) Design task book;
6) Product use and maintenance instructions;
7) Assembly drawings of the lifting system, various assemblies, electrical appliances and hydraulic systems. 3.1.4 Check and adjust the lifting system to make it meet the current technical requirements of the drawings. 3.2 Fitting
3.1.1 In order to make the moving parts of the vehicle work well together, so as to ensure the performance of the lifting belt and the correctness of the test results, the lifting platform should be tested in reverse before the test, and the possible problems and solutions in the process should be recorded in detail. 3.2.2 Lifting part: Run-in according to the requirements of Table 1, and the number of lifting and lowering changes shall not be less than 50 times. One lifting cycle is one time and the lifting height is the stroke.
Approved by the Ministry of Machinery Industry of China No. 1199-06-2
2000-01-01 Implementation
Lifting speed
JB/T9229.3—1999
50% of the maximum speed
Recommended by the most people
3.2.3 Driving part: Run-in according to the requirements of Table 2, and drive on a flat hard road with a small slope or an equivalent road. 3.1.4 For the lifting platform with steam engine, the engine speed plate should be removed after running-in, and the lubricating oil of the engine gearbox and drive axle and the hydraulic system should be replaced, and the lubricating points of each part should be lubricated, and the filter elements of each filter should be cleaned and replaced. 4 Test conditions 4.1 The fuel oil, lubricating oil, liquid oil and temperature rise used in the test sample shall comply with the requirements in the instruction manual. It is not specified to add enough fuel oil, lubricating oil, liquid oil and cooling water: 2 Time>15-30 The driving speed of the internal combustion engine shall not exceed 50% of the engine speed. The upstream motor drive shall not exceed the rated current of the corresponding running motor and shall not exceed the specified current of the corresponding running motor. 4.2 Starting, the battery charge, the density of the electrolytic plate and the liquid level of the electrolyte shall comply with the requirements of GB/T500B and GB.T7403, and the Instructions for use: 4.3 The ambient temperature is 10-35 degrees, the wind speed does not exceed level 3, and the relative humidity of the surrounding air is not more than 90% (temperature is 20%). 4.5 The engine should be fully preheated before the performance test: 4.5.1 The engine water outlet temperature is not less than 70%; 4.5.2 The engine oil temperature is not lower than 509; 4.5.3 The oil leakage of the filter system is not lower than 40%. 4.6 The tires of the platform should meet the following requirements: 4.6.1 The charging error of the pneumatic tire is 20P; 4.6.2 The solid tires are tested in pairs according to the requirements of the platform technology. The hardness difference between the two wheels of the same bridge 1 shall not exceed 5 degrees. 4. The surface of the test site should be flat. On the concrete surface of the whole and disinfection or equivalent hard road surface, the slope is not big! % The area is expected to be lifted separately for the toilet rotation,
4.8 During the test period, the lifting plate should be maintained and repaired according to the instruction manual, and detailed records of the maintenance and repair situation should be made. 20
5 Determination of the structure and main technical characteristics of the whole machine 5.1 Determination of the external dimensions of the lifting platform See Figure! : JE/T9229.3-1999
When the platform is lowered to the parking state without putting it, operate and measure according to the items specified in Table 2, and fill in the measurement data in Table A2.5.2 The weight of the lowering platform can be determined
52.! The equipment is measured and recorded in the middle of the site, and the surface and the ground are in the same plane. 5.1.? When measuring the mother 1, the platform is collected to the lowest, and the work is in the parking state without load. 5.2.3 For the lower white travel lifting platform, first Put the vehicle on the scale from all directions, start the engine after the vehicle stops, put the gearbox in neutral, release the brake, and do not use the camshaft. After weighing, turn the platform 1 and weigh again, and take the average of the two weighings. For the dynamic type camshaft, turn it 180° front and rear, weigh it and take the average, and fill in the measured data in Table A3. 5.3 Determination of the load on the lift bridge
When the vehicle stops at the lowest position and is in a no-load parking state, first put the scale on the same side, weigh the front and rear axle loads in turn, and only allow the wheels of the measured axle to stop on the scale and stop in the middle of the scale as much as possible. After the camshaft stops, start the engine, put the gearbox in neutral, and apply the brake. Do not use the camshaft. After weighing, turn the platform 180° and weigh again, and take the average of the two weighings, and fill in the measured data in Table A1.
5.4 Determination of the center of gravity position of the lifting platform
The lower platform is retracted to the lowest position and is in a no-load parking state. a) Horizontal position, the horizontal change L of the center of gravity before the axle centerline is calculated by formula (1): L.(GG)
Where:
Axle weight, mm;
C—axle weight before no-load parking state, N;
G. Lower platform weight, N.
6 Center of gravity height: The vertical distance H between the center of gravity and the parking ground, as shown in Figure 2. ）Measurement method: first place the front axle wheel of the lifting platform on the weighing platform, support the rear axle, and measure the static radius of the front and rear wheels of the front axle when the rear axle is lifted up by the longitudinal inclination angle of 20°. According to the height of the center of gravity, calculate L(GL-G)-(R, -R)G'teE- R, mm
Formula: G
JBT9229.3-1999
The weight of the front axle after the lifting platform is tilted, N;
G, the weight of the front axle when the lifting platform is in the parking state, N; R—the force radius of the front wheel after the lifting platform is tilted, mm—the static radius of the rear wheel after the lifting platform is tilted, m
The measurement method can also be based on the specific conditions. The starting method, suspension method, etc., and the measured data are filled in Table A3. Figure 2
G Determination of the maximum directional force
! The lifting and lowering are supported and leveled, and can bear large loads and be opened to the maximum position without any cracks. 6.2 Measuring tools: protective rope, silicon weight, etc. 6.3 Measurement basis and method [see Figure 3]: Fix a case at the midpoint of the lifting side, and the other end passes through a certain wheel system base disc, load the table A4 and add the storage weight, and enter the measurement data into the table A4
6.4 During the test, special attention should be paid to prevent the lifting platform from tilting and the movement of the test load. To prevent tipping, ropes can be used. Ropes should not be tightened so that there is no force on the lifting platform before tipping. Determination of the lifting platform
7.1 Determination of natural deflection
11. Lifting state: In the case of wind speed below level 2 indoors or outdoors, the support is not half-opened, and the whole process of descending from the lowest position to the highest position.
了.1.2 Test tools: pen, long board, steel ruler, etc., 7, 1.3 Test force method as shown in Figure 4: During the test, with the help of high buildings or other equipment combined with the lifting platform, a long board is erected on one side of the object or equipment, and a single-sex colored pen is connected in the middle of the measured lifting platform corresponding to it. The extended colored pen can always contact the other vertical board during the entire stopping process of the lifting platform, and the tip of the colored pen is also made into a straight line that is true to the upper surface of the chassis, and the upward extension piece is extended to the maximum lifting height, During the lifting process, the most deviation from the vertical plate is more dense, and the maximum load is changed twice. The number of measurements is increased and filled in Table A4.
7.2 Determination of maximum deviation
JE/9229.3—1999
7.2.1 Outdoor platform state; In the case of wind below 2 levels indoors or outdoors, the support is extended and extended to the maximum weight, and the weight is raised to a high position.
7.2.2 The test egg is used: heavy pole, plate ruler, protection exhaustion policy, etc. 7.2.3 Measurement method As shown in Figure 5: Apply a large lateral force according to 6.3. During measurement, fix a rope at the longitudinal midpoint of the platform, tie a heavy chain to the other rope, and record the vertical distance between the front and rear of the maximum lateral force or the vertical distance between the two on the ground. The above measurement method is performed twice when the lifting price is not exceeded and the maximum load is borne. The measurement is in Table A5. 8 Determination of lifting and lowering speed
Staff! Lifting price state: The support is extended and leveled, and the maximum load is borne and the state of the nut is empty. Maintenance
Responsibility abandoned medical
Technical measurement of lifting parts
8.2 Measurement force method
JB/T9229.3—1999
8.2.! Determination of lifting speed: The lifting speed is measured from the lowest position to the highest position, and the time required for the lifting surface to go from the lowest to the highest position is recorded. Repeat the above test twice and fill in the test data in Table A6. , 2.2 Determination of descending speed: The workbench is lowered from the highest position to the lowest position, and the time and weight required for the workbench to descend from the highest position to the lowest position are recorded. Perform the above test twice, and fill in the test data in Table A. 9 Determination of sinking amount
9.1 Platform state: The outriggers are still extended and leveled, bearing the maximum weight. 9.2 Measuring plate: When the workbench is stationary for 20 minutes at any time, use a tape measure to measure the height from the workbench to the support when the workbench is stationary and when it is stationary for 20 minutes, and: Repeat the above test once, and fill in the measurement data in Table A. 10 Determination of outrigger retraction amount
10.! In the lowering state: the support is extended and leveled: the wheel is required to support the ground 10mm to bear the maximum load, 10.2 The auxiliary mother reaches: the work is lifted to any distance, and the length of the lifting platform legs is measured. After 15m, measure the extension length again, repeat the speed test once, and fill in these test data in Table A7. 11 Determination of load-bearing capacity
11.1 Test date: Check whether the lifting has overload and eccentric load operations to cause permanent deformation and cracks and other abnormal phenomena to each load-bearing component.
11.2 Lifting platform state: the support is extended and leveled. 1, 3 The two working platforms are evenly leveled and subjected to 125% of the maximum load, and the entire lifting is performed once. Observe whether the load-bearing components have permanent deformation and cracks, and fill in the test data in Table A8.
11.4 Place the concentrated load of maximum load at any place 300mm away from the inner periphery of the workpiece and perform 100 drops of the full stroke. Observe whether the load-bearing components have long-term deformation and cracks. Fill in the test results in Table A8. 12 Durability test
12.1 Purpose of the test: The test shall examine the strength of the components, the reliability and durability of the work, the convenience of technical maintenance and the stability of various performances.
12,2 Test method: The workbench is subjected to the maximum load, and the lifting platform used in the production line is continuously lifted and lowered 2500 times within 10 days (one lifting cycle is one time); the descending platform for high-altitude work is continuously lifted and lowered 1500 times within 6 days, and the maximum height and arbitrary height are lifted 5% times each. Check whether the load-bearing components have permanent deformation, and whether the main vulnerable parts have obvious wear and other abnormal phenomena. 11.3 If parts are damaged during the test, the damage should be recorded in detail, and the damaged parts should be replaced and the test should be continued. The test record should be filled in according to the requirements of Table A9 and Table A10. 11 Determination of structural safety factor
The strain gauge method is used for determination. Strain gauges are attached to each main stress point. Before the test, the lifting platform is lifted and lowered 10 times without load and then subjected to full stroke force reversibly and continuously 10 times under the maximum load. At least 10 points are measured and the strain values of each point are recorded according to the test outline. 14 Operation stability test
14.1 Test purpose: To check the stability of the lifting platform when it is subjected to the maximum lateral force or 6-level wind when operating on the allowable road surface. 24
JB/T9229.3—1999
4.2 Lifting platform status: The legs are extended and leveled to the height position, and a large lateral force or a large wind is stacked. 14.3 Test equipment and instruments: tilting table, angle gauge, steel ruler and safety protection device rope, etc. 14.4 Test items 14.4.1 The working platform is subjected to 125% of the maximum load evenly, and the stability of the work in any direction on a plane with a slope of 2.5% is measured: 14.4.1 For the retractable lifting platform and work platform, 15% of the maximum load borne by the part is evenly distributed on the part of the lifting platform, and the stability of the work in any direction on a plane with a slope of 2.% is measured: 14.4.3 The middle load with the maximum load is placed on any side 300mm away from the inner circumference of the work platform, and the lifting platform is placed on the water surface to measure the stability. 14.4.4 The working platform is subjected to 125% of the maximum load evenly, and the stability of the longitudinal operation is measured on a slope with a slope of 10%. Fill in the test data in Table AI: Pay attention to the tilting of the lifting platform during movement; if anti-roll bars are used The rope must not be pulled, and there is no constraint on the case before the lifting platform turns over. 15 Determination of the minimum turning radius
15.1 Lifting platform state: the working platform is retracted to the lowest position and is in operating state. 15.2 Measuring instruments: water needle, ruler, etc. 15.3 Turning method: When turning, the steering wheel (or operating handle) remains stationary after the steering wheel turns a large angle, and turns one circle to the left front, right front, left rear, and right at the minimum speed. Use the water spray installed on the outermost side of the vehicle body to spray water vertically downward to the ground, and draw the turning radius trajectory drawn by the vehicle body. Repeat the above test times, and take the maximum value as the minimum turning radius. Fill in the measurement data in Table A1216 Determination of the maximum driving speed of each gear
6.1 Non-lifting platform state: the working platform is retracted to the lowest position and in operating state, 16.2 Measuring instruments: leather Tape measure, measuring table, etc. 16.3 Test method: The gearbox is placed in the gear to be tested, and the point line is measured. The time for each gear to pass through the 50m measuring section at the maximum driving speed is measured. The auxiliary driving range should ensure that the lifting platform reaches the maximum driving range. The test is carried out twice each time. The test data is written according to Table A13: The maximum driving speed is calculated according to formula (3):
Where: f—the distance of the maximum measuring section, m
The time to pass the measuring section, 5
17 Climbing grade test
1.1 Opening and lowering state: The workbench is retracted to the lowest position and in running state. 17.2 Measuring instruments: leather tape measure, stopwatch, electric meter, thermometer, etc. .(3)
17.3 Test ramp: It should be a high-grade, flat and dry concrete ramp with anti-skid measures on the surface. The test ramp should be set according to Table 3. .
Calculate the slope
Long pressure on the excavated road section
Pre-flat pedaling
JB/T9129.3-1999
Alcohol overload condition
17, 4 Method: After the engine is fully heated, stop on the flat road section at the end of the road. For the self-propelled lift with internal engine, run at the lowest speed, step on the accelerator for more than 3m, and enter the 10m long speed measuring section in the middle of the slope (the speed is not less than 2km/h). For the lift with battery as the walking power, measure the working current and temperature rise of the traction motor during the climbing process. The test method is the same as above, the speed is not more than 2kmh, the working current of the traction motor during the driving process, the temperature rise: the temperature does not exceed the maximum allowable current of the motor, repeat the above test once, and fill in the test data in Table A14. Braking performance test
18.1 Lifting platform status: The T platform is retracted to the lowest position and is in operation. 18.2 Determination of brake resistance: The test shall be carried out according to Table 4. At the beginning of the test, 10 forced braking operations shall be carried out, and the braking deceleration shall be 1m/s. The foot brake shall be used for emergency braking. The braking force shall be controlled by the brake force sensor to be less than 700N, and the brake shall be released. The braking distance is the length between the wheel position when the brake pedal is pressed and the wheel position when the brake pedal is pressed. The above test shall be carried out once, and the test data shall be filled in Table A15. The braking speed shall be less than 20°, and the maximum braking force shall be used. 18.3 Determination of ramp parking performance. The hand brake shall be tightened with a force less than 400N through the pull sensor. The lifting platform shall be stopped on a dry and uniform specified ramp. After stopping for 5 minutes, the descending distance of the lifting platform shall be measured, and the lifting platform shall be turned 10° and pressed again in the same way. The above test shall be repeated once, and the test data shall be filled in Table 15. 19 Driving stability test
19! Test purpose: Check the stability of the lifting platform on the designed ramp. 19.2 Test equipment and instruments: inclined platform, measuring rod, steel tape and safety protection device, etc. 19.3 Test items Longitudinal stability: The longitudinal axis of the lifting platform is parallel to the inclined direction of the inclined platform. Horizontal stability: The longitudinal axis of the lifting platform is perpendicular to the recovery direction of the inclined platform. 19.4 Test method: The workpiece is fully retracted, the operator stops the lifting platform on the inclined platform, tightens the handbrake, the operator leaves the platform, and the platform gradually inclines from zero to the set driving slope. The test only requires the brake to be positioned, and wooden blocks and other things must not be placed on the wheels; if the braking force is not strong, the foot brake can be used to fix the dynamic chain in the braking position. During the test, attention should be paid to the slow opening and closing of the lowering platform. If a protective rope is used, the rope must not be tightened to ensure that the lift is not restrained before it is lowered. Fill in the test data in Table A1520. Determination of noise
20.1 Test period: Determine the noise level at the end of the lift: 20.2 Test instrument: sound level meter, belt measure, 20.3 Test method: Follow the provisions of GB/T1496 on tractor test methods, and fill in the measured data in Table 417. 27
A1 See Table A1-Table A17 for the test record form. JB/T9229.3-1999
Appendix A
(Appendix to the standard]
Test record table
Table A! Parts to be dismantled for measurement and recording Lifting platform model
Production number
Drawing size
Measurement time
Measurement site
Palmability
Original size
Loss testbZxz.net
After-measurement value
Tester
Free measurement
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