CN102435524A - Calibration method and apparatus for pendulum impact testing machine - Google Patents
Calibration method and apparatus for pendulum impact testing machine Download PDFInfo
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- CN102435524A CN102435524A CN2011102795917A CN201110279591A CN102435524A CN 102435524 A CN102435524 A CN 102435524A CN 2011102795917 A CN2011102795917 A CN 2011102795917A CN 201110279591 A CN201110279591 A CN 201110279591A CN 102435524 A CN102435524 A CN 102435524A
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- impact testing
- balance weight
- pendulum
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Abstract
The invention provides a calibration method and apparatus for a pendulum impact testing machine, relating to technology of measurement and calibration. The calibration method comprises the following steps: step 1, carrying out calibration by using the calibration apparatus for the pendulum impact testing machine; 2, carrying out the following procedures for calibration: aligning a hit vertex of the pendulum impact testing machine to be calibrated with a designated hit point of the calibration apparatus for the pendulum impact testing machine, adjusting the height of a pendulum of the pendulum impact testing machine to be calibrated, wherein, the height corresponds to impact energy, an indicated value E0 of which is obtained through calculation, resetting the calibration apparatus for the pendulum impact testing machine, starting the pendulum impact testing machine to be calibrated, reading an actual measurement value E1 of impact energy on an indication plate of the calibration apparatus for the pendulum impact testing machine, and analyzing the value of Edelta, wherein, Edelta satisfies the equation of Edelta=E0-E1. The calibration apparatus comprises a base plate, a vertical rack, a vertical swing rod, a rod shaft and an indication reading means. According to the invention, impact energy can be measured directly, actual measurement of energy loss caused by frictional resistance when the pendulum of the pendulum impact testing machine to be calibrated swings can be realized, and accuracy is improved.
Description
Technical field
The present invention relates to the measurement and calibration technology, especially a kind of balance weight impact testing machine is carried out Calibration Method and device.
Background technology
Balance weight impact testing machine is a kind of device of simulating impact energy and product being tested.As the degree of heel withstand shock, test through balance weight impact testing machine, and according to law of conservation of energy E
Gesture=E
Moving-E
Loss, obtain needed impact kinetic energy through the height of adjustment pendulum.
Shown in Figure 1 is balance weight impact testing machine (the tired impact testing machine of heel).One fork 2 is installed on the support 1; The fastening pendulum 3 in the lower end of fork 2; The pendulum of certain mass is done swing and is fallen under action of gravity; Bump is positioned at the bump summit (like heel 4) under the pendulum system, on scale 5, can directly read the energy that is hit by the bump summit (indicating value on the scale according to E=mgh through calculating).Through the falling height of adjustment pendulum, can obtain being clashed into the different energy that are hit on the summit, and from scale, directly read.
To the calibration of above-mentioned balance weight impact testing machine energy test, quality that originally (prior art) generally adopts and measurement is put and falling height and the method that compares through the energy value that calculates realize.This calibration steps exists following not enough:
The first, the center of gravity location of pendulum acquires a certain degree of difficulty, and the center of gravity location that is easy to generate pendulum is not accurate enough, even error is bigger.Because balance weight impact testing machine shown in Figure 1, the quality of fork can not be ignored, and the body of pendulum also is related to the center of gravity location of pendulum.
The second, oscillator system belongs to physical construction, and the friction force that pendulum receives in swing is bigger, and this friction force institute work (being energy) is difficult to calculate and deduction, and the value that causes simulating produces deviation.
The 3rd, can not directly measure energy values, but the result (E that quality through measuring pendulum and falling height calculate again
Gesture=mgh).
Summary of the invention
The present invention is intended to overcome the above-mentioned deficiency of prior art, and a kind of calibration steps and device of balance weight impact testing machine is provided.It can directly measure impact energy, need not calculate, and need not to find out the centre of gravity place of pendulum, and simultaneously, the energy loss that frictional resistance caused the during swing of the pendulum of the balance weight impact testing machine of being imitated is come out by actual measurement, and accuracy improves.
For this reason, the technical scheme of the calibration steps of balance weight impact testing machine of the present invention and device is following:
The calibration steps of balance weight impact testing machine of the present invention comprises: one of which, calibrate through the calibrating installation of balance weight impact testing machine, and the calibrating installation of balance weight impact testing machine is through demarcating; Its two, calibration steps is:
One, will be aimed at the appointment rum point of the calibrating installation of balance weight impact testing machine by the bump summit of the balance weight impact testing machine in school;
Two, adjustment is by the pendulum height of the balance weight impact testing machine in school, and this highly corresponding impact energy is through calculating indicated value E
0(according to E
0=mgh);
Three, the reading indication on the dial plate of calibrating installation of balance weight impact testing machine is made zero;
Four, start by the balance weight impact testing machine in school, make its pendulum fall the said appointment rum point on the calibrating installation of bump balance weight impact testing machine, read the measured value E of impact energy from the dial plate of the calibrating installation of balance weight impact testing machine
1
Five, analyze E
⊿=E
0-E
1Value, E
⊿The numerical value that is less than or equal to standard, qualified by the metering of the balance weight impact testing machine impact energy in school, otherwise, defective by the metering of the balance weight impact testing machine impact energy in school.
The calibrating installation of balance weight impact testing machine of the present invention; Comprise horizontally disposed bedplate, erect the perpendicular frame, vertical pendulum bar, horizontally disposed bar axle and the indication reading device that are fixedly arranged on the bedplate; The bar axle is striden and is located between two said perpendicular framves; And corresponding said perpendicular frame is all stretched out to surpass the position of corresponding said perpendicular frame in the two ends of bar axle; The bar axle can rotate in the vertical plane perpendicular to the length direction of bar axle, and vertical pendulum bar suspension type is arranged on the wherein end of bar axle and fastening with the bar axle, receives when clashing into as the lower end of free-ended vertical pendulum bar; Can to be the center with the bar axle swing in the vertical plane perpendicular to the length direction of bar axle the vertical pendulum bar, and the bar axle rotates simultaneously; The other end of bar axle is referred to as to install the installation end of indication reading device with the installation of indicating reading device, this end of bar axle;
Said indication reading device is the pointer rotational structure; Comprise dial plate, A pointer, peak value pointer, peak value pointer shaft and peak value pointer shaft erecting frame; The plate face of dial plate and A pointer rotate the vertical plane at place and parallel the setting of vertical plane that the peak value pointer rotates the place, and they are all perpendicular to the length direction of bar axle; One end of A pointer is the center of rotation end, and the other end pushes away end for hitting of bump peak value pointer rotation, and the installation end of the said installation indication reading device of the center of rotation end of A pointer and bar axle is fastening, can do the rotation of concentric in company with the bar axle; One end of peak value pointer is the center of rotation end; The other end is the peak value of indication end with the swing of indication vertical pendulum bar; The center of rotation end of peak value pointer is movably arranged in said peak value pointer shaft, and the central axis of the central axis of said peak value pointer shaft and bar axle is positioned on same the horizontal linear, and said peak value pointer shaft is installed in said peak value pointer shaft support; Said peak value pointer shaft support is installed in perpendicular frame; The indication end of peak value pointer is the arc of the plate face that bends towards dial plate and stretched the rotational plane of A pointer, forces hitting of A pointer to push away end and pushes away the indication end of hitting the peak value pointer, and causing the peak value pointer can serve as that axle rotates with said peak value pointer shaft; Be shaped on the plate face of dial plate with the joint of bar axle be the center of circle radially indicate line with direct indication by the size of the pendulum of school balance weight impact testing machine from the corresponding impact energy highly fallen of place;
Install a shell fragment in the lower end of vertical pendulum bar, on shell fragment, be provided with the appointment rum point.
The leveling bubble of level-off is installed on bedplate, is guaranteed that bedplate is in the horizontal positioned state.
The calibrating installation of balance weight impact testing machine of the present invention must pass through demarcation can be used to calibrate balance weight impact testing machine.
The scaling method of the calibrating installation of balance weight impact testing machine of the present invention is following:
With the standard pendulum with rope hanging on the hitch point that is positioned on the surface level of specifying 2000mm above the rum point; The adjustment suspension; Make standard pendulum maintenance level; During the calibrating installation of bump balance weight impact testing machine, guarantee vertically to clash into the said appointment rum point (each carries out bump highly at least 4 times) of vertical pendulum bar lower end of the calibrating installation of balance weight impact testing machine; Different impact energys when the difference bump through adjustment standard pendulum highly obtains to clash into, its impact energy can calculate according to E=mgh, and wherein, m is the quality of standard pendulum, and h falls the height of bump for the standard pendulum, and g is the acceleration of gravity of locality; Thereby on the plate face of the dial plate of the sign reading device of the calibrating installation of balance weight impact testing machine, obtain the sign scale of different impact energys.
Compare with prior art, the invention has the beneficial effects as follows: one of which, can directly measure impact energy, need not calculate, need not to find out the centre of gravity place of pendulum, directly perceived being suitable for.Its two, the calibrating installation of balance weight impact testing machine of the present invention is through demarcating, the principle of its demarcation is to carry out through the standard value that calculates impact energy with different falling heights with the quality of establishing criteria pendulum, has suitable accuracy.Its three, the calibration steps of balance weight impact testing machine of the present invention is partly drawn in the resistance of the balance weight impact testing machine that is calibrated in the actual measurement, accuracy improves.Its four, the calibrating installation of balance weight impact testing machine of the present invention is simple in structure, is convenient to make, long service life is convenient to promote.
Description of drawings
Fig. 1 is balance weight impact testing machine (the tired impact testing machine of a heel) synoptic diagram;
Fig. 2 is a hammering blow device calibrating installation synoptic diagram of the present invention;
Fig. 3 is indication reading device synoptic diagram (cut-open view).
Among the figure: 100, balance weight impact testing machine; 1, support; 2, fork; 3, pendulum; 4, heel; 5, scale; 6, bedplate; 7, perpendicular frame; 8; The vertical pendulum bar; 9, bar axle; 10, specify rum point; 11, indication reading device; 12, dial plate; 13, A pointer; 14, peak value pointer; 15, peak value pointer shaft; 16, peak value pointer shaft erecting frame, 17, indicate line; 18, the installation end of indication reading device is installed; 200, the calibrating installation of balance weight impact testing machine.
Embodiment
Below, introduce embodiment of the present invention in conjunction with accompanying drawing.
Like Fig. 1, Fig. 2 and shown in Figure 3, the calibration steps of balance weight impact testing machine of the present invention comprises: one of which, calibrate through the calibrating installation 200 of balance weight impact testing machine, and the calibrating installation 200 of balance weight impact testing machine is through demarcating; Its two, calibration steps is:
One, will be aimed at the appointment rum point 10 of the calibrating installation 200 of balance weight impact testing machine by the bump summit of the balance weight impact testing machine 100 in school;
Two, adjustment is by the height of the pendulum 3 of the balance weight impact testing machine 100 in school, and this highly corresponding impact energy is through calculating indicated value E
0(according to E
0=mgh);
Three, the reading indication on the dial plate 12 of calibrating installation 200 of balance weight impact testing machine is made zero;
Four, start by the balance weight impact testing machine 100 in school, make its pendulum 3 fall the said appointment rum point 10 on the calibrating installation 200 of bump balance weight impact testing machine, read the measured value E of impact energy from the dial plate 12 of the calibrating installation 200 of balance weight impact testing machine
1
Five, analyze E
⊿=E
0-E
1Value, E
⊿The numerical value that is less than or equal to standard, qualified by the metering of the balance weight impact testing machine impact energy in school, otherwise, defective by the metering of the balance weight impact testing machine impact energy in school.
Above-mentioned calibration steps carries out under 10-30 ℃ environment.
Like Fig. 2 and shown in Figure 3; The calibrating installation 200 of balance weight impact testing machine of the present invention; Comprise horizontally disposed bedplate 6, erect the perpendicular frame 7, vertical pendulum bar 8, horizontally disposed bar axle 9 and the indication reading device 11 that are fixedly arranged on the bedplate 6; Bar axle 9 is striden and is located between two said perpendicular framves 7; And corresponding said perpendicular frame 7 is all stretched out with the position that surpasses corresponding said perpendicular frame 7 (so-called " surpassing " promptly stretched out enough length, so that vertical pendulum bar 8 is installed respectively at the two ends of bar axle 9 and is indicated reading device 11) in the two ends of bar axle 9, and bar axle 9 can rotate in the vertical plane perpendicular to the length direction of bar axle 9; Vertical pendulum bar 8 suspension types are arranged on the wherein end of bar axle 9 and fastening with bar axle 9; Receive when clashing into as the lower end of free-ended vertical pendulum bar 8, can be the center with bar axle 9 swing in the vertical plane perpendicular to the length direction of bar axle 9 vertical pendulum bar 8, and bar axle 9 rotates simultaneously; The other end of bar axle 9 is referred to as to install the installation end 18 of indication reading device with the installation of indicating reading device 11, this end of bar axle 9.
Said indication reading device 11 is the pointer rotational structure; Comprise dial plate 12, A pointer 13, peak value pointer 14, peak value pointer shaft 15 and peak value pointer shaft erecting frame 16; The plate face of dial plate 12 and A pointer 13 rotates the vertical plane at place and parallel the setting of vertical plane that peak value pointer 14 rotates the place, and they are all perpendicular to the length direction of bar axle 9; One end of A pointer 13 is the center of rotation end, and the other end pushes away end for bump peak value pointer 14 hitting of rotation, and the installation end 18 of the said installation indication reading device of the center of rotation end of A pointer 13 and bar axle 9 is fastening, can do the rotation of concentric in company with bar axle 9; One end of peak value pointer 14 is the center of rotation end; The other end is the peak value of indication end with 8 swings of indication vertical pendulum bar; The center of rotation end of peak value pointer 14 is movably arranged in said peak value pointer shaft 15; The central axis of the central axis of said peak value pointer shaft 15 and bar axle 9 is positioned on same the horizontal linear; Said peak value pointer shaft 15 is installed in said peak value pointer shaft support 16, and said peak value pointer shaft support 16 is installed in perpendicular frame 7, and the indication end of peak value pointer 14 is the arc of the plate face that bends towards dial plate 12 and stretched the rotational plane of A pointer 13; Force hitting of A pointer 13 to push away end and push away the indication end of hitting peak value pointer 14, causing peak value pointer 14 can serve as that axle rotates with said peak value pointer shaft 15; Be shaped on the plate face of dial plate 12 with the joint of bar axle 9 be the center of circle radially indicate line with direct indication by the size of the pendulum 4 of school balance weight impact testing machine 100 from the corresponding impact energy highly fallen of place.
Install a shell fragment in the lower end of vertical pendulum bar 8, on shell fragment, be provided with and specify rum point 10.
The leveling bubble of level-off is installed on bedplate 6, is guaranteed that bedplate 6 is in the horizontal positioned state.
The calibrating installation 200 of balance weight impact testing machine of the present invention must can be used to calibrate balance weight impact testing machine 100 through demarcating.
The scaling method of the calibrating installation 200 of balance weight impact testing machine of the present invention is following:
With the standard pendulum with rope hanging on the hitch point that is positioned on the surface level of specifying 2000mm above the rum point 10; The adjustment suspension; Make standard pendulum maintenance level; During the calibrating installation 200 of bump balance weight impact testing machine, guarantee vertically to clash into the said appointment rum point 10 (each carries out bump highly at least 4 times) of vertical pendulum bar 8 lower ends of balance weight impact testing machine calibrating installation; Different impact energys when the difference bump through adjustment standard pendulum highly obtains to clash into, its impact energy can calculate according to E=mgh, and wherein, m is the quality of standard pendulum, and h falls the height of bump for the standard pendulum, and g is the acceleration of gravity of locality; Thereby on the plate face of the dial plate 12 of the sign reading device 11 of the calibrating installation 200 of balance weight impact testing machine, obtain the sign scale of different impact energys.
Calibrate or it is carried out timing signal at the calibrating installation 200 that uses balance weight impact testing machine, must bedplate 6 be transferred to level (by leveling bubble).
The above only is preferred embodiment of the present invention, is not that technical scope of the present invention is done any restriction.The technician of the industry; Under the inspiration of present technique scheme; Can make some distortion and revise, every foundation technical spirit of the present invention all still belongs in the scope of technical scheme of the present invention above any modification, equivalent variations and modification that embodiment did.
Claims (4)
1. the calibration steps of balance weight impact testing machine is characterized in that, comprising: one of which, calibrate through the calibrating installation of balance weight impact testing machine, and the calibrating installation of balance weight impact testing machine is through demarcating; Its two, calibration steps is:
One, will be aimed at the appointment rum point of the calibrating installation of balance weight impact testing machine by the bump summit of the balance weight impact testing machine in school;
Two, adjustment is by the pendulum height of the balance weight impact testing machine in school, and this highly corresponding impact energy is through calculating indicated value E
0
Three, the reading indication on the dial plate of calibrating installation of balance weight impact testing machine is made zero;
Four, start by the balance weight impact testing machine in school, make its pendulum fall the said appointment rum point on the calibrating installation of bump balance weight impact testing machine, read the measured value E of impact energy from the dial plate of the calibrating installation of balance weight impact testing machine
1
Five, analyze E
⊿=E
0-E
1Value, E
⊿The numerical value that is less than or equal to standard, qualified by the metering of the balance weight impact testing machine impact energy in school, otherwise, defective by the metering of the balance weight impact testing machine impact energy in school.
2. the calibrating installation of the balance weight impact testing machine described in the claim 1; It is characterized in that: comprise horizontally disposed bedplate, erect the perpendicular frame, vertical pendulum bar, horizontally disposed bar axle and the indication reading device that are fixedly arranged on the bedplate; The bar axle is striden and is located between two said perpendicular framves; And corresponding said perpendicular frame is all stretched out to surpass the position of corresponding said perpendicular frame in the two ends of bar axle; The bar axle can rotate in the vertical plane perpendicular to the length direction of bar axle, and vertical pendulum bar suspension type is arranged on the wherein end of bar axle and fastening with the bar axle, receives when clashing into as the lower end of free-ended vertical pendulum bar; Can to be the center with the bar axle swing in the vertical plane perpendicular to the length direction of bar axle the vertical pendulum bar, and the bar axle rotates simultaneously; The other end of bar axle is referred to as to install the installation end of indication reading device with the installation of indicating reading device, this end of bar axle;
Said indication reading device is the pointer rotational structure; Comprise dial plate, A pointer, peak value pointer, peak value pointer shaft and peak value pointer shaft erecting frame; The plate face of dial plate and A pointer rotate the vertical plane at place and parallel the setting of vertical plane that the peak value pointer rotates the place, and they are all perpendicular to the length direction of bar axle; One end of A pointer is the center of rotation end, and the other end pushes away end for hitting of bump peak value pointer rotation, and the installation end of the said installation indication reading device of the center of rotation end of A pointer and bar axle is fastening, can do the rotation of concentric in company with the bar axle; One end of peak value pointer is the center of rotation end; The other end is the peak value of indication end with the swing of indication vertical pendulum bar; The center of rotation end of peak value pointer is movably arranged in said peak value pointer shaft, and the central axis of the central axis of said peak value pointer shaft and bar axle is positioned on same the horizontal linear, and said peak value pointer shaft is installed in said peak value pointer shaft support; Said peak value pointer shaft support is installed in perpendicular frame; The indication end of peak value pointer is the arc of the plate face that bends towards dial plate and stretched the rotational plane of A pointer, forces hitting of A pointer to push away end and pushes away the indication end of hitting the peak value pointer, and causing the peak value pointer can serve as that axle rotates with said peak value pointer shaft; Be shaped on the plate face of dial plate with the joint of bar axle be the center of circle radially indicate line with direct indication by the size of the pendulum of school balance weight impact testing machine from the corresponding impact energy highly fallen of place;
Install a shell fragment in the lower end of vertical pendulum bar, on shell fragment, be provided with the appointment rum point.
3. the calibrating installation of balance weight impact testing machine according to claim 2 is characterized in that: the leveling bubble that level-off is installed on bedplate.
4. the scaling method of the calibrating installation of claim 1 or 2 described balance weight impact testing machines; It is characterized in that: with the standard pendulum with rope hanging on the hitch point that is positioned on the surface level of specifying 2000mm above the rum point; The adjustment suspension makes standard pendulum maintenance level, when clashing into the calibrating installation of balance weight impact testing machine; Guarantee vertically to clash into the said appointment rum point of vertical pendulum bar lower end of the calibrating installation of balance weight impact testing machine, each carries out bump highly at least 4 times; Different impact energys when the difference bump through adjustment standard pendulum highly obtains to clash into, its impact energy can calculate according to E=mgh, and wherein, m is the quality of standard pendulum, and h falls the height of bump for the standard pendulum, and g is the acceleration of gravity of locality; Thereby on the plate face of the dial plate of the sign reading device of the calibrating installation of balance weight impact testing machine, obtain the sign scale of different impact energys.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110279591 CN102435524B (en) | 2011-09-20 | 2011-09-20 | Calibration method and apparatus for pendulum impact testing machine |
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|---|---|---|---|
| CN 201110279591 CN102435524B (en) | 2011-09-20 | 2011-09-20 | Calibration method and apparatus for pendulum impact testing machine |
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| CN102435524B CN102435524B (en) | 2013-05-29 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102944373A (en) * | 2012-11-03 | 2013-02-27 | 无锡市计量测试中心 | Method for measuring absorption energy of pendulum impact tester and puncture tester by weight method |
| CN104048885A (en) * | 2014-06-25 | 2014-09-17 | 东北大学 | Pendulum bob type shearing-resistant impact testing machine and testing method thereof |
| CN105043932A (en) * | 2015-05-13 | 2015-11-11 | 中国三冶集团有限公司 | Soil viscosity measurement apparatus |
| CN105092200A (en) * | 2015-09-01 | 2015-11-25 | 辽宁工业大学 | Starting impact test system for automobile engines |
| CN106197931A (en) * | 2016-07-08 | 2016-12-07 | 济南时代试金试验机有限公司 | A kind of indicator device of shock machine |
| CN107687929A (en) * | 2017-08-28 | 2018-02-13 | 广东小天才科技有限公司 | A kind of drop test equipment, method and its device |
| CN109540675A (en) * | 2018-12-14 | 2019-03-29 | 交通运输部公路科学研究所 | A kind of device and method for evaluating and testing falling sphere body localized contact characteristic |
| CN110823489A (en) * | 2019-11-19 | 2020-02-21 | 中国航发贵州黎阳航空动力有限公司 | Weighing device of pendulum of impact testing machine |
| CN114427947A (en) * | 2022-01-30 | 2022-05-03 | 重庆长安汽车股份有限公司 | Shock resistance testing method for suspension system |
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| CN110865207A (en) * | 2019-11-25 | 2020-03-06 | 天津大学 | On-site calibration device of vibration acceleration monitoring equipment of ocean platform structure |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102944373A (en) * | 2012-11-03 | 2013-02-27 | 无锡市计量测试中心 | Method for measuring absorption energy of pendulum impact tester and puncture tester by weight method |
| CN102944373B (en) * | 2012-11-03 | 2015-05-13 | 无锡市计量测试中心 | Method for measuring absorption energy of pendulum impact tester and puncture tester by weight method |
| CN104048885A (en) * | 2014-06-25 | 2014-09-17 | 东北大学 | Pendulum bob type shearing-resistant impact testing machine and testing method thereof |
| CN105043932A (en) * | 2015-05-13 | 2015-11-11 | 中国三冶集团有限公司 | Soil viscosity measurement apparatus |
| CN105043932B (en) * | 2015-05-13 | 2018-05-18 | 中国三冶集团有限公司 | A kind of consistency of soil measuring device |
| CN105092200A (en) * | 2015-09-01 | 2015-11-25 | 辽宁工业大学 | Starting impact test system for automobile engines |
| CN105092200B (en) * | 2015-09-01 | 2017-07-28 | 辽宁工业大学 | Car engine start shock measuring system |
| CN106197931A (en) * | 2016-07-08 | 2016-12-07 | 济南时代试金试验机有限公司 | A kind of indicator device of shock machine |
| CN107687929A (en) * | 2017-08-28 | 2018-02-13 | 广东小天才科技有限公司 | A kind of drop test equipment, method and its device |
| CN109540675A (en) * | 2018-12-14 | 2019-03-29 | 交通运输部公路科学研究所 | A kind of device and method for evaluating and testing falling sphere body localized contact characteristic |
| CN110823489A (en) * | 2019-11-19 | 2020-02-21 | 中国航发贵州黎阳航空动力有限公司 | Weighing device of pendulum of impact testing machine |
| CN114427947A (en) * | 2022-01-30 | 2022-05-03 | 重庆长安汽车股份有限公司 | Shock resistance testing method for suspension system |
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| CN102435524B (en) | 2013-05-29 |
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