CN202451495U - Pneumatic cylinder applied to automobile crash test - Google Patents
Pneumatic cylinder applied to automobile crash test Download PDFInfo
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- CN202451495U CN202451495U CN2012200173098U CN201220017309U CN202451495U CN 202451495 U CN202451495 U CN 202451495U CN 2012200173098 U CN2012200173098 U CN 2012200173098U CN 201220017309 U CN201220017309 U CN 201220017309U CN 202451495 U CN202451495 U CN 202451495U
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- piston rod
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- air cushion
- linear actuator
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Abstract
The utility model provides a pneumatic cylinder applied to an automobile crash test and belongs to the technical field of mechanics. The pneumatic cylinder solves the problem that an existing pneumatic cylinder lacks a buffer mechanism capable of bearing rigid impact of a piston rod. The pneumatic cylinder applied to the automobile crash test comprises a straight-barrel-shaped cylinder body with cavities and the piston rod which is arranged in the cylinder body and can axially slide along the cylinder body. One end of the piston rod can extend out of the cylinder body, the other end of the piston rod is provided with a piston, the piston divides the cylinder body into two cavities which are an emission cavity communicated with the outside and an airtight air cushion cavity, buffer gas is filled in the air cushion cavity, and a sudden stop mechanism capable of quickly stopping the piston rod is further arranged in the air cushion cavity. The pneumatic cylinder applied to the automobile crash test is provided with the sudden stop mechanism and is simple in structure and easy to control, the impact force of the piston rod is buffered by utilizing deforming force through the sudden stop mechanism, remaining energy of the piston rod is absorbed to quickly stop the piston rod, and accordingly the aim of protecting the cylinder body is achieved.
Description
Technical field
The utility model belongs to field of mechanical technique, relates to a kind of pneumatic linear actuator that is applied to vehicle impact testing.
Background technique
In automotive safety technology experiment chamber; The slide unit test is through nondestructive simulating vehicle collision movement; The occupant receives secondary collision and the injury values that produces is estimated at interior during to vehicle collision, thereby realizes the short-term low cost development of occupant protection system.Servo acceleration table system is designed to the emulation vehicle impact testing; Utilize highly advanced computer-controlled A/H servo-system; Interaction in conjunction with two kinds of power sources of A/H produces collision waveform; The slide unit that the pneumatic part of system provides driving force to quicken guiding come the drag friction power of the brake cutter below the balance slide unit that the power that delays to quicken is provided through hydraulic part, so the design of the pneumatic part of system just seems most important.
Slide unit test simulation real world needs lot of energy to come the accelerated test parts; System stores this energy as potential energy before the emulation collision; Potential energy is stored with a large amount of pressurized air, and system is charged in the pneumatic linear actuator according to the gas that is provided with storing before the test, pneumatic linear actuator emission slide unit.The pressurized gas that piston rod during emission in the pneumatic linear actuator is charged into promote piston rod, and piston rod moves ahead to promote slide unit at a high speed then, hits cylinder cap for preventing piston rod, causes the destruction to pneumatic linear actuator, and damping mechanism of needs slows down or stops piston rod.Common damping mechanism is in the air cushion chamber, to form the movement velocity that air cushion reduces piston rod.For preventing that piston rod from not stopped by the air cushion chamber, so just need a secondary buffer that piston rod is stopped.
A kind of Secondary buffer piston cylinder [patent No.: CN200720112685.4 like State Intellectual Property Office of the People's Republic of China's announcement; Notification number: CN201062601]; This cylinder comprises protecgulum, bonnet, cylinder barrel, piston, piston rod; It is characterized in that having adopted the level 2 buffering structure, and guide ring and magnet ring composition nested construction; The first-level buffer structure: by protecgulum, bonnet, the buffering metering needle, buffer ring, the cushion seal pad, the buffer shaft of cylinder barrel and piston is formed, and makes to form air cushion in the A chamber, reduces the speed of piston, constitutes the adjustable buffer piston of the first order; The level 2 buffering structure: by protecgulum, bonnet, the both ends of the surface of cushion seal pad and piston are formed, and the cushion seal pad is an elastic material, is provided with the intussusception impact capacity, and piston contacts with the cushion seal pad after having moved all strokes, constitutes second level fixed plate buffering.This cylinder utilizes rubber-like cushion seal pad to stop that piston rod moves on; But the piston rod that is applied in the slide unit test has very big acceleration and stronger impact force under a large amount of pressurized gas promote; The buffer function that flexible cushion pad played is insignificant; Cylinder cap certainly will bear the bump of piston rod, therefore must must design a damping mechanism that can bear the piston rod rigid impact.
Summary of the invention
The purpose of the utility model is to have the problems referred to above to existing technology, has proposed a kind of pneumatic linear actuator with anxious stop mechanism that is applied to vehicle impact testing.
The purpose of the utility model can realize through following technical proposal: a kind of pneumatic linear actuator that is applied to vehicle impact testing; Comprise the cylinder body that has cavity and be straight-tube shape and be arranged in the cylinder body and can be along cylinder body piston rod in axial sliding; Described piston rod one end can stretch out outside the cylinder body; The other end of piston rod has piston; Piston is divided into two cavitys with cylinder body: emission cavity that is in communication with the outside and airtight air cushion chamber, described air cushion is filled with buffer gas in the chamber, in described air cushion chamber, also is provided with to make the quick stopping anxious stop mechanism of piston rod.
The piston of piston rod is divided into two cavitys with cylinder body; Through system's setting and control pressurized air is charged into emission cavity during on-test; Emission cavity and air cushion chamber will produce pressure reduction so, and the emission cavity air expansion promotes piston rod, and piston rod promotes slide unit and produces motion.Because the gas volume in air cushion chamber is certain, piston rod air in the air cushion chamber when launching is compressed the generation reaction force, and piston rod is slowed down until stopping.But when piston rod is not stopped by the air cushion chamber; The residue crash energy that the anxious stop mechanism in air cushion chamber can absorb piston rod stops piston rod at once, and the piston rod bump that is not stopped by the air cushion chamber in the time of can effectively preventing the excessive or equipment failure of emission cavity gas damages cylinder body.
In the above-mentioned pneumatic linear actuator that is applied to vehicle impact testing, but described anxious stop mechanism comprises the collapse energy-absorption pipe of being processed by rigid material, but described collapse energy-absorption pipe box outside piston rod and an end be against on the cylinder ends, the other end can lean with piston.But the collapse energy-absorption pipe is a rigid material, can bear certain impact force, and when impact force surpasses its strength, but the collapse energy-absorption pipe produces distortion, utilizes deformation force to come the impact force of the piston of damper piston bar.
In the above-mentioned pneumatic linear actuator that is applied to vehicle impact testing; But described anxious stop mechanism comprises pad tube that leans with cylinder body, piston rod respectively and can slide along piston rod and the collapse energy-absorption pipe of being processed by rigid material; But described collapse energy-absorption pipe box outside piston rod and an end be against on the cylinder ends, the other end leans with pad tube.Form an airtight cavity between pad tube and piston and the cylinder body, this cavity is receiving piston extruding back to form the air cushion with reaction force, to piston rod formation first-level buffer; When piston rod is not stopped by first-level buffer; Piston can touch the pad tube earlier; But the piston of piston rod promotes to fill up tube extruding collapse energy-absorption pipe, but makes the collapse energy-absorption pipe produce distortion, utilizes deformation force to come the impact force of damper piston bar and prevention piston rod to move on; Form level 2 buffering, reach the purpose of protection cylinder body.
In the above-mentioned pneumatic linear actuator that is applied to vehicle impact testing, described pad tube has sealed department and guide portion.Guide portion is used to guide the traffic direction of piston rod, and sealed department makes that the sealing effect in air cushion chamber is better.
In the above-mentioned pneumatic linear actuator that is applied to vehicle impact testing, but offer the pit that circumferentially is uniformly distributed with on the pipe face of described collapse energy-absorption pipe.But pit is used to weaken the intensity of collapse energy-absorption pipe, makes it yielding when being extruded, and has certain energy-absorbing function.
In the above-mentioned pneumatic linear actuator that is applied to vehicle impact testing, but described collapse energy-absorption pipe offers the breach that circumferentially is uniformly distributed with the end that the pad tube leans.But breach is used to weaken the intensity of collapse energy-absorption tube end, makes it more yielding, has improved its energy-absorbing effect, also plays the effect of the piston of protection piston rod simultaneously.
In the above-mentioned pneumatic linear actuator that is applied to vehicle impact testing, be respectively equipped with the suction tude one and the gas bleeder valve that are communicated with emission cavity on the end face of said emission cavity.The air that is stored in before the test in the gas cylinder enters into emission cavity according to system requirements through suction tude one, when the suction tude air inlet surpasses system requirements, and the gas bleeder valve unnecessary gas of will draining automatically.
In the above-mentioned pneumatic linear actuator that is applied to vehicle impact testing, the end face of said emission cavity is provided with pressure transducer one.The air quantity that pressure transducer one detects in the emission cavity constantly improves Security.
In the above-mentioned pneumatic linear actuator that is applied to vehicle impact testing, the end face of said emission cavity is provided with automatic control pressure vent.When perhaps other faults need suddenly stop draining emission cavity gas in process of the test,, the air of emission cavity is discharged through the outlet valve of system's control.
In the above-mentioned pneumatic linear actuator that is applied to vehicle impact testing, the end face of said emission cavity is provided with manual exhaust valve.Can be when system maintenance through the manual exhaust valve gas in the emission cavity of draining.
In the above-mentioned pneumatic linear actuator that is applied to vehicle impact testing, be respectively equipped with suction tude two and the outlet valve that is communicated with the air cushion chamber on the end face in said air cushion chamber.Air cushion chamber air is constant; To arrive steady state value through suction tude two make-up gas that are communicated with the air cushion chamber according to system requirements during each the test; Safeguard when perhaps needing exhaust and can get rid of gas, be connected with outlet valve on its extraneous gas delivery line, open according to system requirements according to system's setting.
In the above-mentioned pneumatic linear actuator that is applied to vehicle impact testing, the end face in said air cushion chamber also is provided with pressure transducer two and acceleration transducer.Pressure transducer two constantly detects the air pressure in the air cushion chamber, feeds back to system through detection in the test and determines whether need air inlet then, if detection can not reach steady state value automatic locking is launched, also can the feedback error prompting.The generation that promptly stops incident in the test will produce a great collision noise.In order to confirm promptly to stop collision; The data that acceleration transducer is followed the trail of will show, and the collision that the incident that promptly stops to take place is different with normal attenuation sinusoidal wave, will confirm whether taken place promptly to stop through showing; If incident has taken place once promptly to stop simultaneously; But the distortion of collapse energy-absorption pipe is serious, must change, but also will check whether pneumatic linear actuator damages.
Compared with prior art, the pneumatic linear actuator that should be used for vehicle impact testing has anxious stop mechanism, and is simple in structure, is easy to control, and the reaction force through certain air in the air cushion chamber slows down piston rod or stops; When piston rod is not stopped by resistance of air, but the impact force that the collapse energy-absorption pipe of anxious stop mechanism utilizes deformation force to come the damper piston bar, and absorption piston rod energy remaining stops piston rod fast, thereby reaches the purpose of protection cylinder body.
Description of drawings
Fig. 1 is the structural representation of the utility model.
But Fig. 2 is the structural representation of this collapse energy-absorption pipe.
Fig. 3 is embodiment one a cross-sectional schematic.
Fig. 4 is embodiment two a cross-sectional schematic.
Among the figure, 1, cylinder body; 2, piston rod; 2a, piston; 3, emission cavity; 4, air cushion chamber; 5, pad tube; 5a, sealed department; 5b, guide portion; But 6 collapse energy-absorption pipes; 6a, pit; 6b, breach; 7, suction tude one; 8, gas bleeder valve; 9, pressure transducer one; 10, automatic control pressure vent; 11, manual exhaust valve; 12, suction tude two; 13, outlet valve; 14, pressure transducer two; 15, acceleration transducer.
Embodiment
Below be the specific embodiment of the utility model and combine accompanying drawing, the technological scheme of the utility model is done further to describe, but the utility model is not limited to these embodiments.
Embodiment one
As shown in Figure 3, this pneumatic linear actuator is applied in the vehicle impact testing, comprise an airtight cylinder body that is straight-tube shape 1 with can be along cylinder body 1 piston rod 2 in axial sliding.Piston rod 2 one ends stretch out outside the cylinder body 1; The other end of piston rod 2 has piston 2a; Piston 2a is divided into two airtight cavitys with cylinder body 1: emission cavity 3 and air cushion chamber 4, be filled with constant gas in the air cushion chamber 4, and also be provided with in the air cushion chamber 4 and can make piston rod 2 quick stopping anxious stop mechanisms.
The anxious stop mechanism of present embodiment comprises the pad tube 5 that leans with cylinder body 1, piston rod 2 respectively and can slide along piston rod 2; Pad tube 5 has sealed department 5a and guide portion 5b; Sealed department 5a is used to strengthen the sealing in air cushion chamber 4, and guide portion 5b guarantees the accuracy of piston rod 2 traffic directions.But anxious stop mechanism also comprises the collapse energy-absorption pipe of being processed by rigid material 6, but the collapse energy-absorption pipe 6 of rigidity can be resisted piston rod 2 high-intensity impact forces, can stop piston rod 2 operations immediately.But collapse energy-absorption pipe 6 is enclosed within outside the piston rod 2 and an end is against on cylinder body 1 end, and the other end leans with pad tube 5.As shown in Figure 2; But offer three pit 6a that circumferentially are uniformly distributed with on the pipe face of collapse energy-absorption pipe 6; The end that leans with pad tube 5 offers three breach 6b that circumferentially are uniformly distributed with; But pit 6a and breach 6b can make collapse energy-absorption pipe 6 more yielding when receiving piston rod 2 extruding, and energy-absorbing effect is better, and cushioning effect is more obvious.
As shown in Figure 1, be respectively equipped with the suction tude 1, gas bleeder valve 8, pressure transducer 1, automatic control pressure vent 10, the manual exhaust valve 11 that are communicated with emission cavity 3 on the end face of emission cavity 3.Be respectively equipped with the suction tude 2 12, outlet valve 13, pressure transducer 2 14 and the acceleration transducer 15 that are communicated with air cushion chamber 4 on the end face in air cushion chamber 4.During test, pressurized gas are charged in the emission cavity 3 from suction tude 1, make piston rod 2 to promote slide unit and advance, make slide unit reach certain speed and come the simulating vehicle collision movement with enough energy.After succeeding in sending up slide unit, piston rod 2 is still advancing at utmost speed, and the constant gas in the air cushion chamber 4 receive the piston 2a extruding of piston rod 2, utilizes by the rapid reaction force of the gas of compression piston rod 2 is slowed down until stopping.After off-test, open the gas that outlet valve 13 is discharged in the emission cavity 3, piston rod 2 is owing to the reaction force of the gas in air cushion chamber 4 revert to emission cavity 3 ends, for test next time is got ready.If do not stopped by the constant gas in air cushion chamber 4 owing to the system failure causes piston rod 2, piston rod 2 will touch anxious stop mechanism so, and piston 2a impinges upon on the pad tube 5; But the collapse energy-absorption pipe 6 that pad tube 5 and then extruding lean with it; But make collapse energy-absorption pipe 6 produce distortion, the impact force of utilizing deformation force to come damper piston bar 2 absorbs piston rod 2 energy remaining simultaneously; Stop piston rod 2 to move on, protection cylinder body 1 is not broken.This pneumatic linear actuator is simple in structure, and is easy and safe to operate at the trial.
Embodiment two
Embodiment two is basic identical with embodiment's one structure; As shown in Figure 4; Difference is that but anxious stop mechanism comprises the collapse energy-absorption pipe of being processed by rigid material 6, but collapse energy-absorption pipe 6 is enclosed within outside the piston rod 2 and an end is against on cylinder body 1 end, and the other end can lean with piston 2a.But the piston 2a of piston rod 2 can directly impinge upon the end of collapse energy-absorption pipe 6, and structure is simple than embodiment one.
Specific embodiment described herein only is that the utility model spirit is illustrated.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from the spirit of the utility model or surmount the defined scope of appended claims.
, do not get rid of the possibility of using other term although but this paper has used terms such as cylinder body 1, piston rod 2, piston 2a, emission cavity 3, air cushion chamber 4, pad tube 5, sealed department 5a, guide portion 5b collapse energy-absorption pipe 6, pit 6a, breach 6b, suction tude 1, gas bleeder valve 8, pressure transducer 1, automatic control pressure vent 10, manual exhaust valve 11, suction tude 2 12, outlet valve 13, pressure transducer 2 14, acceleration transducer 15 morely.Using these terms only is in order to describe and explain the essence of the utility model more easily; It all is contrary with the utility model spirit being construed to any additional restriction to them.
Claims (10)
1. pneumatic linear actuator that is applied to vehicle impact testing; Comprise the cylinder body (1) that has cavity and be straight-tube shape and be arranged in the cylinder body (1) and can be along cylinder body (1) piston rod (2) in axial sliding; Described piston rod (2) one ends can stretch out outside the cylinder body (1); The other end of piston rod (2) has piston (2a), and piston (2a) is divided into two cavitys with cylinder body (1): emission cavity that is in communication with the outside (3) and airtight air cushion chamber (4) is characterized in that; Be filled with buffer gas in the described air cushion chamber (4), in described air cushion chamber (4), also be provided with and make the quick stopping anxious stop mechanism of piston rod (2).
2. the pneumatic linear actuator that is applied to vehicle impact testing according to claim 1; It is characterized in that; But described anxious stop mechanism comprises the collapse energy-absorption pipe of being processed by rigid material (6); But described collapse energy-absorption pipe (6) is enclosed within outside the piston rod (2) and an end is against on cylinder body (1) end, and the other end can lean with piston (2a).
3. the pneumatic linear actuator that is applied to vehicle impact testing according to claim 1; It is characterized in that; Described anxious stop mechanism comprise the pad tube (5) that leans with cylinder body (1), piston rod (2) respectively and can slide along piston rod (2) but and the collapse energy-absorption pipe of processing by rigid material (6); But described collapse energy-absorption pipe (6) is enclosed within outside the piston rod (2) and an end is against on cylinder body (1) end, and the other end leans with pad tube (5).
4. the pneumatic linear actuator that is applied to vehicle impact testing according to claim 3 is characterized in that, described pad tube (5) has sealed department (5a) and guide portion (5b).
5. according to claim 3 or the 4 described pneumatic linear actuators that are applied to vehicle impact testing, it is characterized in that, but offer the pit (6a) that circumferentially is uniformly distributed with on the pipe face of described collapse energy-absorption pipe (6).
6. the pneumatic linear actuator that is applied to vehicle impact testing according to claim 5 is characterized in that, but described collapse energy-absorption pipe (6) offers the breach (6b) that circumferentially is uniformly distributed with the end that pad tube (5) leans.
7. the pneumatic linear actuator that is applied to vehicle impact testing according to claim 6 is characterized in that, is respectively equipped with the suction tude one (7) and the gas bleeder valve (8) that are communicated with emission cavity (3) on the end face of said emission cavity (3).
8. the pneumatic linear actuator that is applied to vehicle impact testing according to claim 7 is characterized in that, the end face of said emission cavity (3) is provided with pressure transducer one (9).
9. the pneumatic linear actuator that is applied to vehicle impact testing according to claim 8 is characterized in that, the end face of said emission cavity (3) is provided with automatic control pressure vent (10).
10. the pneumatic linear actuator that is applied to vehicle impact testing according to claim 9; It is characterized in that; Be respectively equipped with the suction tude two (12) and the outlet valve (13) that are communicated with air cushion chamber (4) on the end face in said air cushion chamber (4), the end face in said air cushion chamber (4) also is provided with pressure transducer two (14) and acceleration transducer (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200173098U CN202451495U (en) | 2012-01-13 | 2012-01-13 | Pneumatic cylinder applied to automobile crash test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200173098U CN202451495U (en) | 2012-01-13 | 2012-01-13 | Pneumatic cylinder applied to automobile crash test |
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| Publication Number | Publication Date |
|---|---|
| CN202451495U true CN202451495U (en) | 2012-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200173098U Expired - Fee Related CN202451495U (en) | 2012-01-13 | 2012-01-13 | Pneumatic cylinder applied to automobile crash test |
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| CN (1) | CN202451495U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103712765A (en) * | 2013-12-30 | 2014-04-09 | 北京航空航天大学 | Impact testing machine |
| CN104568362A (en) * | 2014-12-30 | 2015-04-29 | 浙江吉利汽车研究院有限公司 | Hydraulic sliding table brake device for vehicle sliding table test |
| CN106644348A (en) * | 2017-02-16 | 2017-05-10 | 公安部交通管理科学研究所 | Air pump guide rail type vehicle instrument collision validation device |
| CN107631850A (en) * | 2017-11-02 | 2018-01-26 | 西南交通大学 | A kind of gases at high pressure launch crash device |
| CN110749460A (en) * | 2019-11-25 | 2020-02-04 | 清华大学苏州汽车研究院（相城） | Collision trolley energy absorption structure suitable for multiple working conditions |
| CN113740019A (en) * | 2021-10-08 | 2021-12-03 | 长沙天映航空装备有限公司 | Unmanned aerial vehicle horizontal impact test system |
-
2012
- 2012-01-13 CN CN2012200173098U patent/CN202451495U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103712765A (en) * | 2013-12-30 | 2014-04-09 | 北京航空航天大学 | Impact testing machine |
| CN103712765B (en) * | 2013-12-30 | 2015-12-30 | 北京航空航天大学 | Impact testing machine |
| CN104568362A (en) * | 2014-12-30 | 2015-04-29 | 浙江吉利汽车研究院有限公司 | Hydraulic sliding table brake device for vehicle sliding table test |
| CN104568362B (en) * | 2014-12-30 | 2018-05-01 | 浙江吉利汽车研究院有限公司 | Fluid pressure type slide unit brake gear is used in the experiment of vehicle slide unit |
| CN106644348A (en) * | 2017-02-16 | 2017-05-10 | 公安部交通管理科学研究所 | Air pump guide rail type vehicle instrument collision validation device |
| CN107631850A (en) * | 2017-11-02 | 2018-01-26 | 西南交通大学 | A kind of gases at high pressure launch crash device |
| CN107631850B (en) * | 2017-11-02 | 2019-03-08 | 西南交通大学 | A kind of high pressure gas ejection crash device |
| CN110749460A (en) * | 2019-11-25 | 2020-02-04 | 清华大学苏州汽车研究院（相城） | Collision trolley energy absorption structure suitable for multiple working conditions |
| CN113740019A (en) * | 2021-10-08 | 2021-12-03 | 长沙天映航空装备有限公司 | Unmanned aerial vehicle horizontal impact test system |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120926 Termination date: 20210113 |
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| CF01 | Termination of patent right due to non-payment of annual fee |