CN102364154A - Passive damping adjustable magneto-rheological fluid shock absorber - Google Patents
Passive damping adjustable magneto-rheological fluid shock absorber Download PDFInfo
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- CN102364154A CN102364154A CN2011103268136A CN201110326813A CN102364154A CN 102364154 A CN102364154 A CN 102364154A CN 2011103268136 A CN2011103268136 A CN 2011103268136A CN 201110326813 A CN201110326813 A CN 201110326813A CN 102364154 A CN102364154 A CN 102364154A
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Abstract
The invention discloses a passive damping adjustable magneto-rheological fluid shock absorber. The lower end of a damping cylinder is provided with a piston body; a spring is arranged between the piston body and the bottom surface of the damping cylinder; the middle part of the damping cylinder is provided with a T-shaped piston body; a coil is embedded in a groove at the middle part of a cylindrical surface at the small end of the T-shaped piston body; the coil is sequentially provided with inner and outer hole bodies outwards; the inner and outer hole bodies are in clearance fit; the upper end of the damping cylinder is provided with a T-shaped damping cavity cover body; the upper end of an induction cylinder is connected with an induction cavity cover; permanent magnets are fixed among an inner hole of the induction cylinder, the damping cavity cover body and the lower end of an induction cavity cover; a piston rod passes through the induction cavity cover, an induction iron core and the damping cavity cover body to be connected with a threaded hole at the center of the T-shaped piston body; an induction coil is embedded in a groove of the induction iron core; the two coils are connected through a lead hole in the middle of the piston rod; a sealed inner cavity is formed among the damping cavity cover body, the piston body and the damping cylinder; and the sealed inner cavity is filled with magneto-rheological fluid. The size of a damping force of the shock absorber can be automatically regulated according to the vibration condition and an external power supply and a controller are not required.
Description
Technical field
The present invention relates to a kind of MR fluid shock absorber, especially relate to a kind of passive Adjustable Damping MR fluid shock absorber.
Background technique
Motorcycle, electric motor car and bicycle because road surface hollow or complex-terrain, can cause that the indirect rigidity in occupant and ground vibrates, thereby influence riding safety and travelling comfort when riding, and mostly is furnished with spring at present or mixes the hydraulic type vibration damper and carry out vibration damping.But simple spring damping can't cause jolting of occupant very soon with vibration attenuation, has increased the danger and the uncomfortable degree that drive; Traditional hydraulic type resistance of shock absorber characteristic is constant; Vibration violent when slight with vibration the damping characteristic performance consistent, and in the process of riding for the high vibration of decaying as early as possible, need the increase damping force; Traditional hydraulic type vibration damper does not have the damping regulatory function, therefore can't realize this requirement.Magnetic flow liquid (Magnetorheological Fluid; Be called for short the MR fluid) be by high magnetic permeability, the small soft magnetic particles of low magnetic hysteresis property and the suspension that the non-magnetic liquid mixing forms; This suspension demonstrates low viscous Newtonian fluid characteristic under zero magnetic field condition, and under strong magnetic field action, then demonstrates the Binghan bulk properties of high viscosity, lazy flow; Belong to controlled fluid, can realize that the damping of vibration damper changes.And the magnetic rheological liquid damper of exploitation needs additional power source and controller that the magnetic intensity of magnetic flow liquid is controlled at present, causes the increase of device complicacy and cost; In addition, the magnetic rheological liquid damper damp channel is a straight line type at present, and damping force is less than normal, increase damping force and need increase damp channel length.
Summary of the invention
The object of the present invention is to provide a kind of passive Adjustable Damping MR fluid shock absorber; Thereby can realize that resistance of shock absorber is adjustable need not additional power source, and under same physical dimension, same magnetic field intensity, can obtain the magnetic rheological liquid damper of bigger damping force.
The technological scheme that the present invention solves the problems of the technologies described above employing is:
The lower end inner at damped cylinder is equipped with piston body, is embedded with first seal ring between piston body and damped cylinder, is provided with spring in the Seal cage that forms between piston body and the damped cylinder bottom surface; The inner middle part of damped cylinder is equipped with T shape piston body, is embedded with second seal ring between T shape piston body big end cylndrical surface and damped cylinder, and top cover is sleeved on bottom, T shape piston body small end cylndrical surface, is embedded with the 3rd seal ring between top cover and damped cylinder; The groove at middle part, T shape piston body small end cylndrical surface is embedded with coil; Hole body and outer hole body in coil between big end of T shape piston body and the top cover outwards is equipped with successively; Interior hole body forms Spielpassung with outer hole body; Outer hole body upper and lower end is connected with top cover with the big end of T shape piston body through screw respectively, and the center of piston body large end face has tapped hole and fairlead; T shape damping cavity lid is installed in the inner upper end of damped cylinder; Be pressed on the shoulder of damped cylinder below the big end of T shape damping cavity lid; Be embedded with the 4th seal ring between T shape damping cavity lid small end cylndrical surface and damped cylinder; T shape damping cavity lid is equipped with sealing gasket and isolating ring in the hole from top to bottom, the lower end of induction cylinder be connected above the big end of T shape damping cavity lid, upper end and the induction cavity of induction cylinder cover and are connected; Be fixed with permanent magnet between the endoporus of induction cylinder, damping cavity lid and the induction cavity lid lower end; One end of piston rod is equipped with connecting ring, and the other end of the piston rod of hollow is connected with the tapped hole at piston body center after passing induction cavity lid, inductive iron core, T shape damping cavity lid, sealing gasket and isolating ring, and inductive iron core is fixed on the piston rod; The groove of inductive iron core is embedded with inductor coil, and the inductor coil that is installed on the inductive iron core is connected with lead through the fairlead in the middle of the piston rod with coil on being installed on piston body; Form the inner chamber of a sealing between T shape damping cavity lid, piston body and the damped cylinder, be filled with magnetic flow liquid in the chamber.
Hole body is that cylindrical body Spielpassung or thread pitch cooperate with outer hole body formation Spielpassung in described.The big end of described T shape piston body cylndrical surface has the annular through groove of five equilibrium.Have the annular through groove of five equilibrium on the described top cover cylndrical surface.
The beneficial effect that the present invention has is:
1, adopting induced field current is that magnetic flow liquid provides magnetic field required current source, and when vibration was violent, the inductor coil movement velocity was fast, and the induction current of generation is big, can stronger magnetic intensity be provided for magnetic flow liquid, produces bigger damping force; When vibration was slight, induction current was little, and the magnetic intensity that provides is little, and damping force diminishes relatively, and therefore, this invention has the damping force size according to vibration situation adjustomatic shock absorber, and does not need additional power source and controller;
2, change into spiral-shapedly through section sideline shape, effectively increased the length of damp channel, compare, can reduce the size of piston size and vibration damper, thereby reduce the weight of vibration damper, realize lightweight with the straight line type damp channel with damp channel.
Description of drawings
Fig. 1 is a mechanical construction drawing of the present invention.
Fig. 2 is the A-A sectional view of Fig. 1 piston body.
Fig. 3 is the sectional view of top cover 6.
Among the figure: 1, damped cylinder, 2, magnetic flow liquid, 3, spring, 4, piston body, 5, seal ring, 6, top cover; 7, coil, 8, interior hole body, 9, outer hole body, 10, T shape piston body, 11, piston rod, 12, seal ring; 13, isolating ring, 14, sealing gasket, 15, T shape damping cavity lid, 16, permanent magnet, 17, the induction cylinder; 18, inductor coil, 19, inductive iron core, 20, set screw nut, 21, the induction cavity lid, 22, connecting ring.
Embodiment
Below in conjunction with accompanying drawing and mode of execution the present invention is further described.
As shown in Figure 1, the present invention is equipped with piston body 4 in damped cylinder 1 inner lower end, and 1 of piston body 4 and damped cylinder are embedded with first seal ring 5; Be provided with spring 3 in the Seal cage that forms between piston body 4 and damped cylinder 1 bottom surface; Like this even without external force, when piston body 4 down compresses, because the existence of spring 3 is arranged; Piston body 4 also has thrust upwards, makes piston body 4 get back to meta.Damped cylinder 1 inner middle part is equipped with T shape piston body 10, and T shape piston body 10 big end cylndrical surface and 1 of damped cylinder are embedded with second seal ring, and top cover 6 is sleeved on bottom, T shape piston body 10 small end cylndrical surface, and 1 of top cover 6 and damped cylinder are embedded with the 3rd seal ring; The groove at middle part, T shape piston body 10 small end cylndrical surface is embedded with coil 7; Hole body 8 and outer hole body 9 in coil 7 between T shape piston body 10 big ends and the top cover 6 outwards is equipped with successively; Interior hole body 8 forms Spielpassung with outer hole body 9; Outer hole body 9 upper and lower end are connected with top cover 6 with T shape piston body 10 big ends through screw respectively, and the center of piston body 10 large end faces has tapped hole and fairlead; T shape damping cavity lid 15 is installed in damped cylinder 1 inner upper end; Be pressed on the shoulder of damped cylinder 1 below the T shape damping cavity lid 15 big ends; T shape damping cavity lid 15 small end cylndrical surface and 1 of damped cylinder are embedded with the 4th seal ring 12; T shape damping cavity lid is equipped with sealing gasket 14 and isolating ring 13 in 15 holes from top to bottom; The lower end of induction cylinder 17 is connected above the end greatly with T shape damping cavity lid 15; The upper end of induction cylinder 17 is connected with induction cavity lid 21, and endoporus, damping cavity lid 15 and the induction cavity of induction cylinder 17 cover and be fixed with permanent magnet 16 between 21 lower ends, and an end of piston rod 11 is equipped with connecting ring 22; The other end of the piston rod 11 of hollow passes induction cavity lid 21, inductive iron core 19, T shape damping cavity lid 15, sealing gasket 14 and isolating ring 13 backs and is connected with the tapped hole at piston body 10 centers; Inductive iron core 19 usefulness set screw nuts 20 are fixed on the piston rod 11, and the groove of inductive iron core 19 is embedded with inductor coil 18, and the inductor coil 18 that is installed on the inductive iron core 19 is connected with lead through the fairleads in the middle of the piston rod 11 with coil 7 on being installed on piston body 10; Form the inner chamber of a sealing between T shape damping cavity lid 15, piston body 4 and the damped cylinder 1, be filled with magnetic flow liquid 2 in the chamber.
Hole body 8 is that cylindrical body Spielpassung or thread pitch cooperate with outer hole body 9 formation Spielpassung in described.
As shown in Figure 2, described T shape piston body 10 big end cylndrical surface have the annular through groove of five equilibrium.As shown in Figure 3, have the annular through groove of five equilibrium on described top cover 6 cylndrical surface.Therefore, magnetic flow liquid 2 can flow between the epicoele of piston body 10 and cavity of resorption.
Working principle of the present invention:
Connecting ring 22 is connected with car body, and the lower end of damped cylinder 1 is connected with vehicle bridge, when vibration takes place car body; Piston rod 11 can drive inductive iron core 19, inductor coil 18 at the permanent magnet 16 incised magnetic lines of force, can produce electric current on the inductor coil 18, vibrates more little; Electric current is more little, and vibration is by big, and electric current is also just big more; Inductor coil 18 links together with coil 7 again, thus the electric current on the inductor coil 18 again with coil 7 on electric current the same, when the car body pressed downward; Drive piston rod 11, piston body 10 etc. and press down together, thereby make the magnetic flow liquid 2 of top cover 6 lower ends pass through the interior hole body 8 of three cavitys (as shown in Figure 3) flow direction of top cover 6 and the gap that outer hole body 9 forms, and flow to the cavity of piston body 10 upper ends through three cavitys (as shown in Figure 2) of piston body 10; When car body was up jumped, vice versa.Therefore, the solid, liquid attitude degree of the Current Control magnetic flow liquid 2 on the coil 7 changes, and also can change to the reaction force of piston body 10 generations, thereby makes piston rod 11 get back on the meta.
The inboard of outer hole body 9 has internal thread; The outside of interior hole body 8 has outside thread; And through thread engagement together, the section sideline, space that forms between therefore outer hole body 9, the interior hole body 8 is spiral-shaped, so has effectively increased the length of damp channel; Can reduce the weight of vibration damper, realize lightweight.
Claims (4)
1. passive Adjustable Damping MR fluid shock absorber; It is characterized in that: the lower end inner at damped cylinder (1) is equipped with piston body (4); Be embedded with first seal ring between piston body (4) and damped cylinder (1), be provided with spring (3) in the Seal cage that forms between piston body (4) and damped cylinder (1) bottom surface; The inner middle part of damped cylinder (1) is equipped with T shape piston body (10); T shape piston body (10) is held greatly between cylndrical surface and damped cylinder (1) and is embedded with second seal ring; Top cover (6) is sleeved on bottom, T shape piston body (10) small end cylndrical surface, is embedded with the 3rd seal ring between top cover (6) and damped cylinder (1); The groove at middle part, T shape piston body (10) small end cylndrical surface is embedded with coil (7); Coil (7) between big end of T shape piston body (10) and the top cover (6) outwards is equipped with interior hole body (8) and outer hole body (9) successively; Interior hole body (8) and outer hole body (9) form Spielpassung; Outer hole body (9) upper and lower end is connected with top cover (6) through the big end of screw and T shape piston body (10) respectively, and the center of piston body (10) large end face has tapped hole and fairlead; T shape damping cavity lid (15) is installed in the inner upper end of damped cylinder (1); Be pressed on the shoulder of damped cylinder (1) below the big end of T shape damping cavity lid (15); Be embedded with the 4th seal ring between T shape damping cavity lid (15) small end cylndrical surface and damped cylinder (1); Sealing gasket (14) and isolating ring (13) are installed in T shape damping cavity lid (15) hole from top to bottom; The lower end of induction cylinder (17) is connected above holding with T shape damping cavity lid (15) is big; The upper end of induction cylinder (17) is connected with induction cavity lid (21); Be fixed with permanent magnet (16) between the endoporus of induction cylinder (17), damping cavity lid (15) and induction cavity lid (21) lower end; One end of piston rod (11) is equipped with connecting ring (22), and the other end of the piston rod of hollow (11) passes induction cavity lid (21), inductive iron core (19), T shape damping cavity lid (15), sealing gasket (14) and isolating ring (13) back and is connected with the tapped hole at piston body (10) center, and inductive iron core (19) is fixed on the piston rod (11); The groove of inductive iron core (19) is embedded with inductor coil (18), and the inductor coil (18) that is installed on the inductive iron core (19) is connected with lead through the fairlead in the middle of the piston rod (11) with coil (7) on being installed on piston body (10); Form the inner chamber of a sealing between T shape damping cavity lid (15), piston body (4) and the damped cylinder (1), be filled with magnetic flow liquid in the chamber.
2. passive damping MR fluid shock absorber according to claim 1 is characterized in that: hole body (8) and outer hole body (9) formation Spielpassung is that cylindrical body Spielpassung or thread pitch cooperate in described.
3. passive damping MR fluid shock absorber according to claim 1 is characterized in that: described T shape piston body (10) holds the cylndrical surface to have the annular through groove of five equilibrium greatly.
4. passive damping MR fluid shock absorber according to claim 1 is characterized in that: the annular through groove that has five equilibrium on described top cover (6) cylndrical surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110326813 CN102364154B (en) | 2011-10-25 | 2011-10-25 | Passive damping adjustable magneto-rheological fluid shock absorber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110326813 CN102364154B (en) | 2011-10-25 | 2011-10-25 | Passive damping adjustable magneto-rheological fluid shock absorber |
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| CN102364154A true CN102364154A (en) | 2012-02-29 |
| CN102364154B CN102364154B (en) | 2013-03-13 |
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| CN 201110326813 Expired - Fee Related CN102364154B (en) | 2011-10-25 | 2011-10-25 | Passive damping adjustable magneto-rheological fluid shock absorber |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103486188A (en) * | 2013-10-10 | 2014-01-01 | 重庆大学 | Self-powered magneto-rheological damper |
| CN103557264A (en) * | 2013-11-15 | 2014-02-05 | 重庆大学 | Condition monitoring based passive magneto rheological vibration damper |
| CN104930112A (en) * | 2015-05-07 | 2015-09-23 | 江苏大学 | A self-supplied energy damping adjustable vibration reduction device |
| CN106678256A (en) * | 2017-01-19 | 2017-05-17 | 长安大学 | Magnetoelectric self-powered suspension shock absorber of electric vehicle |
| CN108788333A (en) * | 2018-06-14 | 2018-11-13 | 浙江师范大学 | A kind of tapping auxiliary device based on magnetic rheology effect |
| CN110388403A (en) * | 2019-07-17 | 2019-10-29 | 重庆大学 | Dual-channel variable inertia variable damping shock absorber |
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| US20070007091A1 (en) * | 2005-07-08 | 2007-01-11 | Stabilus Gmbh | Gas spring |
| CN101915283A (en) * | 2010-08-06 | 2010-12-15 | 浙江大学 | A magneto-rheological composite damping control method and device |
| CN201786985U (en) * | 2010-09-26 | 2011-04-06 | 华侨大学 | A double-coil magneto-rheological shock absorber |
| CN102109024A (en) * | 2009-12-29 | 2011-06-29 | 深圳市德平国瀚汽车电子科技有限公司 | Electronic control shock absorber |
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2011
- 2011-10-25 CN CN 201110326813 patent/CN102364154B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070007091A1 (en) * | 2005-07-08 | 2007-01-11 | Stabilus Gmbh | Gas spring |
| CN102109024A (en) * | 2009-12-29 | 2011-06-29 | 深圳市德平国瀚汽车电子科技有限公司 | Electronic control shock absorber |
| CN101915283A (en) * | 2010-08-06 | 2010-12-15 | 浙江大学 | A magneto-rheological composite damping control method and device |
| CN201786985U (en) * | 2010-09-26 | 2011-04-06 | 华侨大学 | A double-coil magneto-rheological shock absorber |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103486188A (en) * | 2013-10-10 | 2014-01-01 | 重庆大学 | Self-powered magneto-rheological damper |
| CN103486188B (en) * | 2013-10-10 | 2015-03-18 | 重庆大学 | Self-powered magneto-rheological damper |
| CN103557264A (en) * | 2013-11-15 | 2014-02-05 | 重庆大学 | Condition monitoring based passive magneto rheological vibration damper |
| CN104930112A (en) * | 2015-05-07 | 2015-09-23 | 江苏大学 | A self-supplied energy damping adjustable vibration reduction device |
| CN106678256A (en) * | 2017-01-19 | 2017-05-17 | 长安大学 | Magnetoelectric self-powered suspension shock absorber of electric vehicle |
| CN106678256B (en) * | 2017-01-19 | 2018-08-03 | 长安大学 | A kind of electric vehicle magneto-electric self-powered suspension damper |
| CN108788333A (en) * | 2018-06-14 | 2018-11-13 | 浙江师范大学 | A kind of tapping auxiliary device based on magnetic rheology effect |
| CN108788333B (en) * | 2018-06-14 | 2024-01-16 | 浙江师范大学 | A tapping auxiliary device based on magnetorheological effect |
| CN110388403A (en) * | 2019-07-17 | 2019-10-29 | 重庆大学 | Dual-channel variable inertia variable damping shock absorber |
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Granted publication date: 20130313 Termination date: 20171025 |