CN102506118A - Automobile collision magneto-rheological fluid damper - Google Patents
Automobile collision magneto-rheological fluid damper Download PDFInfo
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- CN102506118A CN102506118A CN2011103225817A CN201110322581A CN102506118A CN 102506118 A CN102506118 A CN 102506118A CN 2011103225817 A CN2011103225817 A CN 2011103225817A CN 201110322581 A CN201110322581 A CN 201110322581A CN 102506118 A CN102506118 A CN 102506118A
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- percussion piston
- clutch release
- slave cylinder
- release slave
- damp tube
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Abstract
The invention discloses an automobile collision magneto-rheological fluid damper which comprises a working cylinder, a percussion piston, a percussion piston rod and a damping tube, wherein the percussion piston is arranged at one end in the working cylinder, and one end of the percussion piston is fixed on one end of the percussion piston rod; the other end of the percussion piston rod stretches out of the working cylinder through a sliding bearing arranged at one end of the working cylinder, the outer periphery of the other end of the percussion piston is provided with the sliding bearing and a seal ring, and a space between the other end of the percussion piston and the bottom of the working cylinder is filled with a magneto-rheological fluid; the damping tube is fixed on the bottom of the working cylinder, and one end of the damping tube fixed on the bottom of the working cylinder is communicated with the working cylinder; a port part of one end of the damping tube at a communication part of the damping tube and the working cylinder is provided with a seal membrane, and a cylindrical permanent magnet is sealed and fixed at the bottom of the other end of the damping tube; and the diameter of the cylindrical permanent magnet is less than the inner diameter of the damping tube and a gap in which the magneto- rheological fluid flows is reserved, and the periphery of the bottom of the damping tube is uniformly provided with multiple through holes.
Description
Technical field
The invention belongs to a kind of vibration damper, be specifically related to a kind of car crash magneto-rheological vibration damper.
Background technique
Increase along with the owning amount of China's automobile; The automobile probability that bumps also increases greatly; Vehicle and occupant are caused damage when bumping in order to reduce automobile; People have researched and developed various car crash vibration dampers, like one Chinese patent application number are: " the car crash piston vibration damper " of ZL93245003.2, and one Chinese patent application number is: " a kind of car crash protection vibration damper " of ZL200420087894.9; Because " car crash piston vibration damper " provides constant damping force; And " a kind of car crash protection vibration damper " provides elastic damping; So; Use these car crash vibration dampers can play a role for automobile reduces vehicle and occupant when bumping infringement; But modern collision theory is thought: in the process that automobile bumps, the damping force that requires the car crash vibration damper to produce will have a process that increases gradually from small to large, that is: when car crash contact beginning, require the car crash vibration damper that a less damping force is provided; And the damping force that requires the car crash vibration damper to produce along with the sustainable development of car crash will increase gradually; It is minimum that collision is reduced to causing damage of vehicle and occupant, therefore, when the performance of existing car crash vibration damper is difficult to satisfy automobile and bumps to the requirement of vibration damper and effectiveness in vibration suppression is undesirable.
Summary of the invention
To the relatively poor deficiency of existing car crash vibration damper effectiveness in vibration suppression, the present invention proposes brand-new car crash vibration damper, that is: a kind of car crash magneto-rheological vibration damper.
Technological scheme of the present invention is following:
A kind of car crash magneto-rheological vibration damper; It comprises clutch release slave cylinder, percussion piston, percussion piston bar and damp tube; Percussion piston places the end in the clutch release slave cylinder; The diameter of percussion piston is less than the internal diameter of clutch release slave cylinder, and an end of percussion piston and an end of percussion piston bar are fixed, and the other end of percussion piston bar stretches out in clutch release slave cylinder through the sliding bearing of clutch release slave cylinder one end; Sliding bearing and seal ring are installed on the excircle of the other end of percussion piston, in the space of the other end of percussion piston and clutch release slave cylinder bottom, have been full of magnetic flow liquid; The bottom of clutch release slave cylinder is fixed with damp tube; And an end that is fixed on the damp tube of clutch release slave cylinder bottom is communicated with clutch release slave cylinder; The oral area that is communicated with damp tube one end at place at damp tube with clutch release slave cylinder is equipped with seal membrane, and in the bottom seals of the damp tube the other end and be fixed with cylindrical permanent magnet, cylindrical permanent magnet is coaxial with damp tube; The diameter of cylindrical permanent magnet is less than the internal diameter of damp tube and leave the gap that magnetic flow liquid flows; The length of cylindrical permanent magnet on the circumference of damp tube bottom, be evenly equipped with a plurality of through holes, and damp tube is the pipe that is made up of permeability magnetic material less than the length of damp tube.
Function of the present invention is achieved in that some little bumps taking place, so that seal membrane when splitting cruelly, a kind of car crash magneto-rheological vibration damper does not act on when the Impact energy deficiency; When beginning bigger bump takes place, after the percussion piston bar was clashed into, the percussion piston bar made the magnetic flow liquid of percussion piston in motion of clutch release slave cylinder bottom and compression work cylinder; Magnetic flow liquid in the clutch release slave cylinder makes the pressure in the clutch release slave cylinder increase after the compression that receives percussion piston; Because of magnetic flow liquid under the condition in zero magnetic field is the liquid of good fluidity,, be communicated with clutch release slave cylinder owing to damp tube simultaneously because liquid is can not be compressed; So; The magnetic flow liquid that receives percussion piston compression transfers the pressure on the seal membrane of damp tube oral area, and when seal membrane is unable to bear after the bump transferred pressure takes place to split cruelly, the magnetic flow liquid in the clutch release slave cylinder begins to be pressed in the damp tube by percussion piston; Simultaneously; Air in the damp tube is discharged from the through hole on the circumference of damp tube bottom, and at this moment, the damping force that percussion piston receives is less; Subsequently; Under the continuation effect of Impact energy; Percussion piston continues the magnetic flow liquid in the clutch release slave cylinder to be pressed in the damp tube, owing on the axis of damp tube, be fixed with cylindrical permanent magnet, so; In the annular gap of damp tube internal diameter and cylindrical permanent magnet external diameter, formed stronger magnetic field; Make the magnetic flow liquid that enters in the damp tube annular gap under the effect of high magnetic fields because of its viscosity uprises " curings ", the magnetic flow liquid after " curings " will receive bigger damping force when mobile in damp tube, thus the damping force that percussion piston is received begins increase; Under the continuous action of Impact energy, along with percussion piston is pressed into being on the increase of magnetic flow liquid in the damp tube annular gap and makes by the magnetic flow liquid of " curing " and constantly increase, this damping force that just makes percussion piston receive also constantly increases; Percussion piston movement in clutch release slave cylinder is to the bottom of clutch release slave cylinder, the magnetic flow liquid in the clutch release slave cylinder all is pressed in the annular gap of damp tube after, percussion piston is with stop motion, the damping force that percussion piston is received is maximum.
Hence one can see that: the present invention comes the magnetic flow liquid in the compression work cylinder with the Impact energy that automobile produces through percussion piston when colliding; Make it constantly enter into the damp tube that is fixed with cylindrical permanent magnet on the axis and produce damping force; Since the bump the duration; The magnetic flow liquid that enters in the damp tube is on the increase (that is being: be on the increase by the magnetic flow liquid of " curing "); The damping force that magnetic flow liquid flows in damp tube is constantly increased, thereby make percussion piston produce the purpose that a damping force that constantly increases reaches vibration damping.
In order to be applicable to the needs of different automobiles to the car crash magneto-rheological vibration damper; The magnetic intensity that the present invention also can be through caliber, the length of adjustment damp tube, the diameter of cylindrical permanent magnet, the length of cylindrical permanent magnet, cylindrical permanent magnet, the size of seal membrane and thickness etc. come the damping property of a kind of car crash magneto-rheological vibration damper of the present invention is changed.Compare with existing car crash vibration damper, because a kind of car crash magneto-rheological vibration damper of the present invention can provide a damping force from small to large in the process that automobile bumps, thereby effectiveness in vibration suppression is desirable more.
Description of drawings
Fig. 1 is a kind of structural representation of the present invention.
Fig. 2 is the sectional view of damp tube among Fig. 1.
Fig. 3 is that the present invention is fixed on the practical application schematic representation on the bumper.
Fig. 4 is the present invention's schematic representation in the course of the work.
Fig. 5 is the schematic representation of end-of-job of the present invention.
Embodiment
Specify structure of the present invention below in conjunction with accompanying drawing:
Referring to Fig. 1 and Fig. 2; This is a kind of concrete structure of the present invention, a kind of car crash magneto-rheological vibration damper, and it comprises clutch release slave cylinder 7, percussion piston 6, percussion piston bar 1 and damp tube 9; Percussion piston 6 places the end in the clutch release slave cylinder 7; The diameter of percussion piston 6 is less than the internal diameter of clutch release slave cylinder 7, and an end of percussion piston 6 and an end of percussion piston bar 1 are fixed, and the other end of percussion piston bar 1 stretches out in clutch release slave cylinder 7 through the sliding bearing 2 of clutch release slave cylinder 7 one ends; Sliding bearing 3 and seal ring 4 are installed on the excircle of the other end of percussion piston 6, in the space of the other end of percussion piston 6 and clutch release slave cylinder 7 bottoms, have been full of magnetic flow liquid 5; The bottom of clutch release slave cylinder 7 is fixed with damp tube 9; And an end that is fixed on the damp tube 9 of clutch release slave cylinder 7 bottoms is communicated with clutch release slave cylinder 7; The oral area that is communicated with damp tube 9 one ends at place at damp tube 9 with clutch release slave cylinder 7 is equipped with seal membrane 8, and in the bottom seals of damp tube 9 the other ends and be fixed with cylindrical permanent magnet 10, cylindrical permanent magnet 10 is coaxial with damp tube 9; The diameter of cylindrical permanent magnet 10 is less than the internal diameter of damp tube 9 and leave the gap 11 that magnetic flow liquid 5 flows; The length of cylindrical permanent magnet 10 through hole 12 and through hole 13 are arranged, and damp tube 9 is the pipes that are made up of permeability magnetic material less than the length of damp tube 9 on the circumference of damp tube 9 bottoms.
Combine accompanying drawing that car crash magneto-rheological vibration damper of the present invention is further described now: referring to Fig. 3; On the longeron 22 that the clutch release slave cylinder of two car crash magneto- rheological vibration dampers 24 and 25 is separately fixed at automobile chassis and the longeron 23, two car crash magneto- rheological vibration dampers 24 and 25 percussion piston bar are fixed on the bumper 20; Referring to Fig. 3 and Fig. 1, when automobile bumped, bumper 20 made the magnetic flow liquid 5 of percussion piston 6 in motion of clutch release slave cylinder 7 bottoms and compression work cylinder 7 with the percussion piston bar 1 that propelling vehicle collides magneto- rheological vibration damper 24 and 25; Magnetic flow liquid 5 in the clutch release slave cylinder 7 makes the pressure in the clutch release slave cylinder 7 increase after the compression that receives percussion piston 6; Because of magnetic flow liquid 5 under the condition in zero magnetic field is the liquid of good fluidity,, be communicated with clutch release slave cylinder 7 owing to damp tube 9 simultaneously because liquid is can not be compressed; So; The magnetic flow liquid 5 that receives percussion piston 6 compression transfers the pressure on the seal membrane 8 of damp tube 9 oral areas, is unable to bear after the bump transferred pressure takes place to split cruelly when seal membrane 8 holds, and magnetic flow liquids 5 beginnings in the clutch release slave cylinder 9 are pressed in the damp tube 7 by percussion piston 6; Simultaneously; Air in the damp tube 9 is discharged with through hole 13 from the through hole 12 on the damp tube 9 bottom circumference, and at this moment, the damping force that percussion piston 6 receives is less; Subsequently; Under the continuation effect of Impact energy; Percussion piston 6 continues the magnetic flow liquid 5 in the clutch release slave cylinder 7 to be pressed in the damp tube 9, owing on the axis of damp tube 9, be fixed with cylindrical permanent magnet 10, so; In the annular gap 11 of damp tube 9 internal diameters and cylindrical permanent magnet 10 external diameters, formed stronger magnetic field; Make the magnetic flow liquid 5 that enters in damp tube 9 annular gaps 11 under the effect of high magnetic fields because of its viscosity uprises " curings " (referring to magnetic flow liquid 5A of Fig. 4), the magnetic flow liquid 5A after " curings " will receive bigger damping force when mobile in damp tube 9, thus the damping force that percussion piston 6 is received begins increase; Under the continuous action of Impact energy, along with percussion piston 6 is pressed into being on the increase of magnetic flow liquid 5 in damp tube 9 annular gaps 11 and makes by the magnetic flow liquid 5A of " curings " and constantly increase, this just makes the also constantly increase of damping force that percussion piston 6 receives; Referring to Fig. 5, after the magnetic flow liquid 5 when the percussion piston in the clutch release slave cylinder 76 moves to the bottom of clutch release slave cylinder 7 and in the clutch release slave cylinder 7 all was pressed in the annular gap 11 of damp tube 9, percussion piston 6 was with stop motion, and the damping force that percussion piston 6 is received is maximum.
Claims (2)
1. car crash magneto-rheological vibration damper; It comprises clutch release slave cylinder, percussion piston, percussion piston bar and damp tube; It is characterized in that: said percussion piston places the end in the clutch release slave cylinder; The diameter of percussion piston is less than the internal diameter of clutch release slave cylinder, and an end of percussion piston and an end of percussion piston bar are fixed, and the other end of percussion piston bar stretches out in clutch release slave cylinder through the sliding bearing of clutch release slave cylinder one end; Sliding bearing and seal ring are installed on the excircle of the other end of percussion piston, in the space of the other end of percussion piston and clutch release slave cylinder bottom, have been full of magnetic flow liquid; The bottom of said clutch release slave cylinder is fixed with damp tube; And an end that is fixed on the damp tube of clutch release slave cylinder bottom is communicated with clutch release slave cylinder; The oral area that is communicated with damp tube one end at place at damp tube with clutch release slave cylinder is equipped with seal membrane; In the bottom seals of the damp tube the other end and be fixed with cylindrical permanent magnet, cylindrical permanent magnet is coaxial with damp tube, and the diameter of cylindrical permanent magnet is less than the internal diameter of damp tube and leave the gap that magnetic flow liquid flows; The length of cylindrical permanent magnet is evenly equipped with a plurality of through holes less than the length of damp tube on the circumference of damp tube bottom.
2. a kind of car crash magneto-rheological vibration damper as claimed in claim 1 is characterized in that: said damp tube is the pipe that is made up of permeability magnetic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110322581 CN102506118B (en) | 2011-10-21 | 2011-10-21 | Automobile collision magneto-rheological fluid damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110322581 CN102506118B (en) | 2011-10-21 | 2011-10-21 | Automobile collision magneto-rheological fluid damper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102506118A true CN102506118A (en) | 2012-06-20 |
| CN102506118B CN102506118B (en) | 2013-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110322581 Expired - Fee Related CN102506118B (en) | 2011-10-21 | 2011-10-21 | Automobile collision magneto-rheological fluid damper |
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| Country | Link |
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| CN (1) | CN102506118B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104175985A (en) * | 2014-09-03 | 2014-12-03 | 重庆大学 | Magnetic control cement based automobile collision buffering system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3908781A (en) * | 1972-11-24 | 1975-09-30 | Nippon Soken | Vehicle impact absorbing bumper device with collision detector |
| CN2260740Y (en) * | 1996-08-13 | 1997-08-27 | 陈宾 | Damper shock-absorbing device for collision of automobile |
| CN101216086A (en) * | 2008-01-14 | 2008-07-09 | 南京航空航天大学 | Magnetic shock-absorbing device |
| JP2008215406A (en) * | 2007-02-28 | 2008-09-18 | Hitachi Ltd | Magnetic fluid damper |
| CN202251636U (en) * | 2011-10-21 | 2012-05-30 | 谭晓婧 | Automobile impact magneto-rheological damper |
-
2011
- 2011-10-21 CN CN 201110322581 patent/CN102506118B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3908781A (en) * | 1972-11-24 | 1975-09-30 | Nippon Soken | Vehicle impact absorbing bumper device with collision detector |
| CN2260740Y (en) * | 1996-08-13 | 1997-08-27 | 陈宾 | Damper shock-absorbing device for collision of automobile |
| JP2008215406A (en) * | 2007-02-28 | 2008-09-18 | Hitachi Ltd | Magnetic fluid damper |
| CN101216086A (en) * | 2008-01-14 | 2008-07-09 | 南京航空航天大学 | Magnetic shock-absorbing device |
| CN202251636U (en) * | 2011-10-21 | 2012-05-30 | 谭晓婧 | Automobile impact magneto-rheological damper |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104175985A (en) * | 2014-09-03 | 2014-12-03 | 重庆大学 | Magnetic control cement based automobile collision buffering system |
| CN104175985B (en) * | 2014-09-03 | 2016-08-31 | 重庆大学 | Buffering automobile collision system based on magnetic control clay |
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| Publication number | Publication date |
|---|---|
| CN102506118B (en) | 2013-08-07 |
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Granted publication date: 20130807 Termination date: 20141021 |
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