CN103423364B - The dydraulic shock absorber that a kind of damping is adjustable - Google Patents

The dydraulic shock absorber that a kind of damping is adjustable Download PDF

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Publication number
CN103423364B
CN103423364B CN201310346937.XA CN201310346937A CN103423364B CN 103423364 B CN103423364 B CN 103423364B CN 201310346937 A CN201310346937 A CN 201310346937A CN 103423364 B CN103423364 B CN 103423364B
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China
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pipeline
chamber
pressure chamber
valve core
oil pressure
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CN201310346937.XA
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Chinese (zh)
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CN103423364A (en
Inventor
李仲兴
陈望
孙益
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江苏大学
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Publication of CN103423364B publication Critical patent/CN103423364B/en

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Abstract

The present invention discloses the adjustable dydraulic shock absorber of a kind of damping be arranged on automobile, connecting fluid hydraulic circuit d between upper oil cavitie b and lower oil cavitie c, and oil hydraulic circuit d is provided with oil pressure chamber; Oil pressure chamber comprises oil pressure chamber and is positioned at piston valve core and two springs of oil pressure chamber, and oil pressure chamber is divided into chamber e and chamber f by piston valve core, piston valve core has two through holes; Pipeline d1 head end is connected with upper oil cavitie b, end is connected with oil pressure chamber and road d3 is taken on side, and pipeline d3 is connected with chamber f, and pipeline d6 connects chamber f and lower oil cavitie c; Pipeline d5 head end is connected with lower oil cavitie c, end is connected with oil pressure chamber and road d4 is taken on side, and pipeline d4 connects chamber e, and pipeline d2 connects chamber e and upper oil cavitie b; Utilize pressure at two ends difference in oil pressure chamber to promote piston valve core motion, oil pipe is changed with the area that is communicated with of piston valve core, change the speed of fluid through piston valve core to change damping, damping value is regulated in real time automatically with road conditions.

Description

The dydraulic shock absorber that a kind of damping is adjustable

Technical field

The present invention relates to a kind of vibration damper be arranged on automobile, refer in particular to the dydraulic shock absorber that a kind of damping is adjustable.

Background technique

For accelerating the decay of vehicle frame and body vibrations, to improve the smoothness of automobile running, all vibration damper is housed in the suspension system inside of most of automobile.The basic principle of vibration damper utilizes damping to consume the energy of generation in vibration to realize vibration damping.Hydraulic shock absorber utilizes the fluid damping technology of orifice restriction to realize the damping behavior of suspension system, its action principle is when vehicle frame and vehicle bridge make reciprocal relative movement, piston in hydraulic shock absorber is also reciprocating in cylinder barrel, the fluid in housing is made to flow into another inner chamber from an inner chamber by some narrow holes repeatedly, now, in friction between hole wall and fluid and fluid molecule, friction just forms the damping force to vibration, make the vibrational energy of vehicle body and vehicle frame be converted into heat energy and by fluid and housing absorb, then fall apart in air.At present, the dydraulic shock absorber that existing multiple damping is adjustable, such as application number is a kind of adaptive transmission control of 91201256.0 announcements, its feature is the piston rod, rotary valve core bar etc. that comprise hollow type, is placed in by stepper motor in dust-proof cover, and stepper motor drive shaft connects rotary valve, its shortcoming is that stepper motor is in vibrational state for a long time, life-span is not high, and device volume is excessive, and hollow piston rod mechanical strength is low.It is also the minicar magnetic current intelligent vibration damper of 200510060298.6 announcements just like application number, it controls the viscosity of magnetic liquid by the magnetic field of the size of current thus the generation of change hot-wire coil that change hot-wire coil, finally reach the object that damping is variable, but magnetic rheological liquid easily precipitates, power-off or change after electric current, original magnetic fields can not be eliminated immediately, and damping property is unstable.

Summary of the invention

For solving the problem, the invention provides the dydraulic shock absorber that a kind of damping is adjustable, being intended to solve the problem such as traditional vibration damper unstable properties, complex structure, life-span be low.

The technical solution used in the present invention: comprise cylinder body, floating piston and piston, cylinder body is divided into the lower oil cavitie c of the compressed air cell a on top, middle upper oil cavitie b and bottom by floating piston and piston, outside at cylinder body, connecting fluid hydraulic circuit d between upper oil cavitie b and lower oil cavitie c, oil hydraulic circuit d is provided with oil pressure chamber; Oil pressure chamber comprises oil pressure chamber and is positioned at piston valve core and two springs of oil pressure chamber, and oil pressure chamber is divided into chamber e and chamber f by piston valve core, is respectively supported with a spring in chamber e and chamber f; Piston valve core has two through holes; Oil hydraulic circuit d is made up of 6 fluid pipelines d1, d2, d3, d4, d5, d6, pipeline d1 head end is connected with upper oil cavitie b, centre is provided with the second one-way valve, end is connected with oil pressure chamber and road d3 is taken on side, pipeline d3 is connected with chamber f, and pipeline d6 directly connects chamber f and lower oil cavitie c; Pipeline d5 head end is connected with lower oil cavitie c, centre is provided with the first one-way valve, end is connected with oil pressure chamber and road d4 is taken on side, and pipeline d4 connects chamber e, and pipeline d2 directly connects chamber e and upper oil cavitie b; Work as piston upwards, the second one-way valve opens, the first one-way valve closes, and fluid promotes piston valve core and moves to chamber e, and the first through hole on piston valve core is gradually just to pipeline d1 and pipeline d6; When piston moves downward, the first one-way valve opens, the second one-way valve closes, and fluid promotes piston valve core and moves to chamber f, and the second through hole on piston valve core is gradually just to pipeline d2 and pipeline d3.

The invention has the beneficial effects as follows:

1, the present invention utilizes pressure at two ends in oil pressure chamber poor, promote piston valve core side-to-side movement, oil guide pipe is changed with the area that is communicated with of piston valve core, thus change the speed of fluid through piston valve core, change damping, the damping value of vibration damper is changed with road conditions.The requirement of the present invention to executive component is lower, reliable performance, and owing to directly relying on the oil pressure difference of cylinder body upper and lower cavity, restriction is controlled, it is made to adapt to various road conditions, can also according to the real-time automatic damping adjusting of road conditions, various vehicle can be met in the needs of various operating mode and various roads situation, improve the Security of travelling comfort and the driving taken.

2, the present invention does not apply the devices such as extra sensor, stepper motor, and cost reduces greatly, reliably energy-conservation; Structure is simple, cheap for manufacturing cost, for ease of maintenaince promotes.

Accompanying drawing explanation

In order to more fully explain structure of the present invention and working principle, the present invention is described further with embodiment in conjunction with the following drawings.

Fig. 1 is the front sectional view of damper structure of the present invention;

Fig. 2 is the internal structure enlarged view in oil pressure chamber 5 in Fig. 1;

Fig. 3 is the axonometric drawing of piston valve core 9 in Fig. 2;

Fig. 4 is composition and the connection diagram thereof of oil hydraulic circuit d in Fig. 1;

Fig. 5 is the fluid flow schematic diagram of vibration damper of the present invention when compression stroke;

Fig. 6 is vibration damper of the present invention fluid flow schematic diagram when extension stroke;

In figure: 1. cylinder body; 2. floating piston; 3. piston; 4,6. one-way valve; 5. oil pressure chamber; 7. oil pressure chamber; 8,10. spring; 9. piston valve core; 10. through hole; 11. guide rails.

Embodiment

As shown in Figure 1, the vibration damper that damping of the present invention is adjustable comprises cylinder body 1, floating piston 2, piston 3.Wherein floating piston 2 is in cylinder body 1, is positioned at the top of piston 3, contacts with cylinder body 1 inner wall sealing.The piston rod of piston 3 bottom reaches outside cylinder body 1 from the bottom in cylinder body 1, and piston 3 has the normal open hole of 1mm, and the top of piston 3 contacts with cylinder body 1 inner wall sealing.Cylinder body 1 is divided into three chambers by floating piston 2 and piston 3, is the lower oil cavitie c of the compressed air cell a on top, middle upper oil cavitie b and bottom respectively.Compressed air cell a be used for compensating piston 3 move upward (compression stroke) enter in cylinder body 1, the reduction of cylinder body 1 oil storage volume.Outside at cylinder body 1, be connected with oil hydraulic circuit d between upper oil cavitie b with lower oil cavitie c, oil hydraulic circuit d installs oil pressure chamber 5, the oil hydraulic circuit d between oil pressure chamber 5 and upper oil cavitie b installs one-way valve 6, the oil hydraulic circuit d between oil pressure chamber 5 and lower oil cavitie c installs one-way valve 4.

As shown in Figure 2, oil pressure chamber 5 comprises oil pressure chamber 7, piston valve core 9 and two springs 8,10, and piston valve core 9 and two springs 8,10 are installed in oil pressure chamber 7, and piston valve core 9 outer side wall contacts with oil pressure chamber 7 inner wall sealing.Oil pressure chamber 5 is divided into two chambers by piston valve core 9, is chamber e and chamber f respectively.In a chamber install a spring, a spring supporting between one end of piston valve core 9 and oil pressure chamber 7, i.e. mounting spring 8 in chamber e, mounting spring 10 in chamber f.On one end that spring 8 and spring 10 are pressed against piston valve core 9 and oil pressure chamber 7.

As shown in Figure 3, the both sides outer wall of piston valve core 9 respectively arranges a guide rail 11, the both sides inwall of oil pressure chamber 7 respectively has a groove, guide rail 11 and fit depressions, and guide rail 11 can be free to slide in groove, piston valve core 9 can be free to slide in oil pressure chamber 7.Piston valve core 9 has two through holes 10, two through holes 10 are being upheld and are being aimed at the hole for connecting fluid hydraulic circuit d on oil pressure chamber 7 in compression two working procedure, guide rail 11 can also degrees of freedom in limited piston spool 9 sense of rotation, ensures that two holes that piston valve core 9 is offered can aim at the hole on oil pressure chamber 7 all the time.

As shown in Figure 4, oil hydraulic circuit d is made up of 6 fluid pipelines d1, d2, d3, d4, d5, d6, and this oil hydraulic circuit d is provided with oil pressure chamber 5.Pipeline d1 head end is connected with cylinder body 1, is connected to the upper oil cavitie b of cylinder body 1, and in the middle of pipeline d1, one-way valve 6 is housed, pipeline d1 end is connected with oil pressure chamber 5, and at its end other adapter road d3.Pipeline d3 connects the chamber f in oil pressure chamber 5, is so just connected with the inner chamber in oil pressure chamber 5 by pipeline d1, chamber f is communicated with pipeline d3 by pipeline d1 with the upper oil cavitie b of cylinder body 1.Chamber f is then directly connected by pipeline d6 with the lower oil cavitie c of cylinder body 1.The pipeline diameter of pipeline d1, d3, d6 is identical.Pipeline d5 head end is connected with cylinder body 1, and in the middle of the lower oil cavitie c of cylinder body 1, pipeline d5, one-way valve 4 is housed, pipeline d5 end is connected with oil pressure chamber 5, and at pipeline d5 end other adapter road d4.Pipeline d4 connects the chamber e in oil pressure chamber 5, is so just connected with another chamber of inside, oil pressure chamber 5 by pipeline d5, chamber e is communicated with pipeline d5 by pipeline d4 with the lower oil cavitie c of cylinder body 1.Chamber e is then directly connected by pipeline d2 with the upper oil cavitie b of cylinder body 1.The pipeline diameter of pipeline d2, d4, d5 is identical.Pipeline d1, d3 and d6 are compression stroke fluid flow pipe, and pipeline d2, d4 and d5 are extension stroke fluid flow pipe.In double barreled dydraulic shock absorber, the damping in the damping ratio extension stroke in compression stroke is little, therefore the pipeline diameter of pipeline d1, d3, d6 is larger than the pipeline diameter of pipeline d2, d4, d5.

As shown in Figure 5, when the piston 3 in cylinder body 1 moves upward, vibration damper does compression movement, and one-way valve 6 is opened, and one-way valve 4 closes, and fluid is circulated by pipeline d1, flows to chamber f through pipeline d3.The oil liquid pressure of chamber f is greater than the oil liquid pressure of chamber e, fluid promotes piston valve core 9 and moves to chamber e, the first through hole 10 on piston valve core 9 is gradually just to the position of pipeline d1 and pipeline d6, the first through hole 10 on piston valve core 9 and pipeline d1 circulation area is made to become large, liquid flows through speed quickening from the first through hole 10 of pipeline d1 and piston valve core 9, is passed to lower oil cavitie c through pipeline d6.When automobile is subject to larger excitation, piston 3 compression stroke distance increases, and makes pressure in upper oil cavitie b larger, make pressure in chamber f become large simultaneously, promote piston valve core 9 to move to chamber e, make piston valve core 9 and pipeline d1 circulation area become large, damping diminishes; Otherwise when being subject to less excitation, damping becomes large.

As shown in Figure 6, when the piston 3 in cylinder body 1 moves downward, vibration damper does stretching exercise, and one-way valve 4 is opened, and one-way valve 6 closes, and fluid is circulated by pipeline d5, flows to chamber e through pipeline d4.Oil liquid pressure in chamber e is greater than the oil liquid pressure in chamber f, fluid promotes piston valve core 9 and moves to chamber f, the second through hole 10 on piston valve core 9 is gradually just to the position of pipeline d2 and pipeline d3, the second through hole 10 on piston valve core 9 and pipeline d5 circulation area is made to become large, liquid flows through speed quickening from the second through hole 10 of pipeline d5 and piston valve core 9, is passed to upper oil cavitie b through pipeline d2.When automobile is subject to larger excitation, piston 3 extension stroke distance increases, and makes pressure in lower oil cavitie c larger, make pressure in chamber e become large simultaneously, promote piston valve core 9 to move to chamber f, make piston valve core 9 and branch road d5 circulation area become large, damping diminishes; Otherwise when being subject to less excitation, damping becomes large.

Claims (3)

1. the dydraulic shock absorber that a damping is adjustable, comprise cylinder body (1), floating piston (2) and piston (3), cylinder body (1) is divided into the lower oil cavitie c of the compressed air cell a on top, middle upper oil cavitie b and bottom by floating piston (2) and piston (3), it is characterized in that: outside at cylinder body (1), between upper oil cavitie b and lower oil cavitie c, connecting fluid hydraulic circuit d, oil hydraulic circuit d are provided with oil pressure chamber (5); Oil pressure chamber (5) comprises oil pressure chamber (7) and is positioned at piston valve core (9) and two springs of oil pressure chamber (7), and oil pressure chamber (5) are divided into chamber e and chamber f by piston valve core (9), are respectively supported with a spring in chamber e and chamber f; Piston valve core (9) has two through holes (10); Oil hydraulic circuit d is made up of 6 fluid pipelines d1, d2, d3, d4, d5, d6, pipeline d1 head end is connected with upper oil cavitie b, centre is provided with the second one-way valve (6), end is connected with oil pressure chamber (5) and road d3 is taken on side, pipeline d3 is connected with chamber f, and pipeline d6 directly connects chamber f and lower oil cavitie c; Pipeline d5 head end is connected with lower oil cavitie c, centre is provided with the first one-way valve (4), end is connected with oil pressure chamber (5) and road d4 is taken on side, and pipeline d4 connects chamber e, and pipeline d2 directly connects chamber e and upper oil cavitie b; When piston (3) moves upward, the second one-way valve (6) is opened, and the first one-way valve (4) closes, and fluid promotes piston valve core (9) and moves to chamber e, and the first through hole (10) on piston valve core (9) is gradually just to pipeline d1 and pipeline d6; When piston (3) moves downward, the first one-way valve (4) is opened, and the second one-way valve (6) closes, and fluid promotes piston valve core (9) and moves to chamber f, and the second through hole (10) on piston valve core (9) is gradually just to pipeline d2 and pipeline d3.
2. the dydraulic shock absorber that a kind of damping according to claim 1 is adjustable, it is characterized in that: the pipeline diameter of pipeline d2, d4, d5 is identical, the pipeline diameter of pipeline d1, d3, d6 is identical, and the pipeline diameter of pipeline d1, d3, d6 is greater than the pipeline diameter of pipeline d2, d4, d5.
3. the dydraulic shock absorber that a kind of damping according to claim 1 is adjustable, is characterized in that: the both sides outer wall of piston valve core (9) is respectively arranged a guide rail, the both sides inwall of oil pressure chamber (7) respectively has groove, guide rail and a fit depressions.
CN201310346937.XA 2013-08-12 2013-08-12 The dydraulic shock absorber that a kind of damping is adjustable CN103423364B (en)

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TWI588378B (en) * 2015-04-30 2017-06-21 Liu li-qun Buffer storage device
CN106481728A (en) * 2015-08-31 2017-03-08 南京英剑机电科技有限公司 A kind of passive hydraulic type inertia force generating meanss
CN105546016B (en) * 2016-03-07 2017-08-22 吉林大学 The passive damper of one species semi- active control
CN106195099B (en) * 2016-07-12 2019-01-11 嘉兴学院 A kind of automobile damping device
CN106678484A (en) * 2016-11-17 2017-05-17 国家电网公司 High-energy pipeline impact power absorber in power planning
CN108397504A (en) * 2018-03-29 2018-08-14 青岛理工大学 External adjustable variable damping viscous damping devices
WO2020024654A1 (en) * 2018-08-01 2020-02-06 陈刚 Liquid gas supporting shock absorber and vehicle using same
CN109972696A (en) * 2019-04-18 2019-07-05 上海人民企业集团水泵有限公司 Installation is stablized and the non-negative pressure method of water supply remote supervisory and control(ling) equipment case with safeguard function

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CN1362588A (en) * 2000-12-29 2002-08-07 梅特罗株式会社 Shock-absorbing buffer
CN1628223A (en) * 2001-11-06 2005-06-15 科尼公司 Shock absorber with frequency-dependent damping
CN201021704Y (en) * 2004-09-17 2008-02-13 尤利乌斯·布卢姆有限公司 Flow damper

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JP2009287653A (en) * 2008-05-28 2009-12-10 Showa Corp Damping-force adjusting structure of hydraulic damper

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1362588A (en) * 2000-12-29 2002-08-07 梅特罗株式会社 Shock-absorbing buffer
CN1628223A (en) * 2001-11-06 2005-06-15 科尼公司 Shock absorber with frequency-dependent damping
CN201021704Y (en) * 2004-09-17 2008-02-13 尤利乌斯·布卢姆有限公司 Flow damper

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