CN102954142A - Bidirectional hydraulic limit damper - Google Patents
Bidirectional hydraulic limit damper Download PDFInfo
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- CN102954142A CN102954142A CN2011102459244A CN201110245924A CN102954142A CN 102954142 A CN102954142 A CN 102954142A CN 2011102459244 A CN2011102459244 A CN 2011102459244A CN 201110245924 A CN201110245924 A CN 201110245924A CN 102954142 A CN102954142 A CN 102954142A
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Abstract
The invention relates to a bidirectional hydraulic limit damper for an automotive suspension. The bidirectional hydraulic limit damper comprises a double-barrel oil cylinder, a piston device and a bottom valve device, a reset limit sleeve is arranged at the lower end of a guider on the double-barrel oil cylinder, a reset limit cone is arranged at the upper end of a piston body of the piston device, a circulating valve channel on a piston rod is provided with an oil replenishing hole which is communicated with a working cylinder, the bottom valve device comprises a bottom valve seat and a bottom valve bonnet which are arranged on the lower side of the working cylinder, a bottom valve on a bottom valve spring is sleeved in the bottom valve bonnet, a compression valve plate and a valve bonnet are arranged below the bottom valve, a compression limit damping shaft is arranged in a center hole of the bottom valve, steel balls are filled in a cavity among the lower side of the center hole of the bottom valve, the compression limit damping shaft and the valve bonnet, and the valve bonnet, the bottom valve, the compression limit damping shaft and the steel balls are assembled to form a compression limit one-way valve.
Description
Technical field
The present invention relates to a kind of for the double-drum type vibration damper on the automotive suspension, a kind of Bidirectional hydraulic limit shock absorber specifically.
Background technique
The run distance caging device (buffer stopper) of being made by rubber is housed on the automotive suspension usually, and the associated components such as vehicle body, suspension is subject to strong bump when being used for preventing large-amplitude vibration.There is a serious shortcoming in this structure that plays position-limiting action by elasticity, is exactly that the energy that absorbs of its compressive strain can discharge in ensuing recovery stroke, thereby can not sponges rapidly impact.
At present, be widely used in the vibration damper on the automotive suspension, its resistance depends on up and down connecting end speed of related movement usually, and damping force and stroke have nothing to do and only and velocity correlation.Speed of related movement is very little when extreme limit of travel, thereby the damping that produces is also very little, does not produce enough large spacing power.Common bottom valve of shock absorber structure by all-in-one-piece bottom valve body and on valve block consist of, the bottom valve body is connected on the clutch release slave cylinder and can not moves radially.
The adaptive damping rear shock absorber (patent No. 200420079303.9) of existing a kind of internal airbag has been explained a kind of vibration damper of the compression damping that can change, but there is some major defect in actual applications in this structure, one, changes at its compression damping until can be because damping shaft stops up the piston flowing valve before the maximum value, cause the not enough vacuum that produces of vibration damper rod chamber repairing, the generation of vacuum can make the vibration damper indicator diagram produce idle running, has a strong impact on the life-span of vehicle ride comfort and vibration damper itself.Two, its bottom valve and damping shaft are for being fixedly connected on the vibration damper bottom, piston produces wearing and tearing in the vibration damper using process, radial clearance strengthens, piston inevitably can produce certain radial deflection, in the situation that damping shaft is fixing, gently then accelerate the damping shaft wearing and tearing, heavy then damping shaft can't cooperate smoothly with the damping core retainer plate makes damping shaft produce bending.Three, its bottom valve is provided with oil through and compression valve block, damping shaft stop up the piston flowing valve at present cavity pressure can't promote in a large number (because oil can release from the bottom valve valve block), can only make on this structure theory compression damping produce piston area and piston rod area only than lifting, and because rodless cavity pressure can't obviously promote, compression damping can't be controlled easily.
Two kinds nothing more than of the recovery limit methods of existing vibration damper inside, damping rubber block or damping spring, these two kinds of limit methods all only play and relax the effect of impacting, and can not sponge and impact the energy that produces, and can turn back to these energy in the system in backhaul.Seem particularly important therefore design a kind of shock absorber structure that restores the impact energy in the stroke that effectively absorbs.
At present vibration damper is because structure is limit, and the rebuilt valve passage all is distributed in interior ring and the flowing valve passage is distributed in the piston outer shroud on the piston, and this is difficult to realization so that restore hydraulic stop.
Summary of the invention
The objective of the invention is to provide a kind of vehicle body that when improving the car load smoothness, limits to cross the mode of violent oscillatory motion, can regulate simultaneously compression damping and recovery damping and adjustable degree large, the work of mating for vibration damper and car load provides a kind of new thinking, in the time of by suitable reduction normal travel damping, utilize the damping that changes with stroke to control acceleration and the moving stroke of suspension of vehicle body.
The object of the present invention is achieved like this, and this vibration damper comprises: bitubular oil cylinder, piston apparatus, bottom valve device, and limit casing is restored with one in the guider lower end on the described bitubular oil cylinder; Spacing centrum is restored with one in piston body upper end on the piston apparatus, and with the repairing hole, the repairing hole is communicated with clutch release slave cylinder on the flowing valve passage on the piston rod; Described bottom valve device comprises foot valve seat and the bottom valve lid that is arranged on below the clutch release slave cylinder, be arranged on the bottom valve body on the bottom valve spring of being set with in the bottom valve lid, be arranged on compression valve block and valve gap below the bottom valve body, be arranged on the compression limit damping axle in the bottom valve body center hole, be provided with steel ball in the cavity below bottom valve body center hole, between compression limit damping axle and the valve gap, consisted of a compression spacing one-way valve after valve gap, bottom valve body, compression limit damping axle and the steel ball assembling.
The present invention has the following advantages and good effect:
1, the energy that absorbs by damping restriction stroke of the present invention changes heat energy into and distributes, thus significantly attenuation vibration.
2, the present invention changes the bottom valve device structure of common double-drum type vibration damper, use the floated bottom valve body with hollow shaft to replace common fixing bottom valve structure, wherein do not establish damping hole on the bottom valve device, oil all enters bottom valve device by hollow shaft during compression stroke.Piston can block the damping shaft endoporus and make the rodless cavity sealing when compression stroke is larger, and compression damping increases, until rodless cavity thoroughly seals, compression damping becomes infinity in theory.And then formation compression position-limiting action.After hollow shaft and piston circulation valve passage cooperates, the unidirectional Fill valve of hollow shaft below is opened, utilize the pull of vacuum of rod chamber that it is carried out repairing, and Floating bottom valve device can carry out trace move radially offset trace skew bring that two axial lines might produce to the infringement of hollow shaft and unnecessary friction, with the raising vibration damper life-span.
3, the present invention proposes a kind of novel double-drum type vibration damper piston structure, comprise the flowing valve passage in the piston rod, entrance is at the rebuilt valve of outer shroud, and piston top be used for restoring spacing cone, the spacing cone of recovery when the recovery stroke is larger on the piston can cooperate with the recovery limit casing of guider bottom, block the piston valve damping hole, recovery damping force is increased, and form the recovery position-limiting action.
4, bottom valve body integral body of the present invention can be carried out moving radially of trace, effect is when hollow shaft cooperates with piston circulation valve passage when compression is spacing, can carry out trace move radially offset trace skew bring that two axial lines might produce to the infringement of hollow shaft and unnecessary friction, with the raising vibration damper life-span.
5, the present invention compress limit damping axle (hollow shaft) but the bottom is provided with the Fill valve of one-way flow, its role is to when piston stops that the spacing hollow shaft of compression forms the spacing power of compression, endoporus by hollow shaft carries out repairing to restoring the chamber, in order to avoid ensuing recovery stroke forms idle running.
6, the present invention compresses the limit damping axle and can be processed into different taperings, and resistance power is changed on demand.
Description of drawings
Fig. 1 is the overall structure schematic diagram of Bidirectional hydraulic limit shock absorber.
Fig. 2 is the local structure for amplifying schematic diagram of bottom valve device part of the present invention.
Fig. 3 is the laboratory data indicator diagram of the present invention in stand test.
Embodiment
Shown in accompanying drawing 1:
1., guider 14, loam cake 15, oil sealing 19,0 type circle 20, oil storage cylinder 21, clutch release slave cylinder 29 and 30 assemblings of lower hanger consist of bitubular oil cylinders, wherein limit casing 13 is restored with one in guider 14 lower ends;
2., rebuilt valve spring 9, recovery valve block lid 10,0 type circle 11, piston body 12, dust-proof cover 16, compression cushion pad 17, lower end consist of piston apparatus with piston rod 18, flowing valve valve block 23, piston ring 24, piston tightening nut pad 25, the valve block 26 that resets, piston tightening nut 27 and the upper hanger 31 of flowing valve passage 8, wherein spacing centrum 22 is restored with one in piston body 12 upper ends, with repairing hole 33, repairing hole 33 is communicated with clutch release slave cylinder 29 on the flowing valve passage 8 on the piston rod 18;
Shown in accompanying drawing 2: bottom valve device comprises: be arranged on clutch release slave cylinder 29 following foot valve seat 3 and bottom valves and cover 5, be arranged on the bottom valve body 4 that is set with bottom valve spring 6 in the bottom valve lid 5, be arranged on compression valve block 2 and valve gap 1 below the bottom valve body 4, be arranged on the compression limit damping axle 7 in bottom valve body 4 center holes, described compression limit damping axle 7 is the hollow shaft with center hole 34, below bottom valve body 4 center holes, be provided with steel ball 28, valve gap 1 in the cavity between compression limit damping axle 7 and the valve gap 1, bottom valve body 4, consisted of a compression spacing one-way valve after compression limit damping axle 7 and steel ball 28 assemblings.
Adopt the mode of Spielpassung between described bottom valve body 4 and the bottom valve lid 5, purpose is when producing the trace skew between compression limit damping axle 7 and flowing valve passage 8 two axial lines, compression limit damping axle 7 can carry out trace move radially offset trace skew bring that two axial lines might produce to the infringement of compression limit damping axle 7 and unnecessary friction, with the raising vibration damper life-span.
Described compression limit damping axle 7 upper ends are the centrum parts with tapering, and compression damping changes controlled continuously with stroke in piston body 12 movement processes.
Restoring spacing cone 22 restores damping and changes controlled continuously with stroke in piston 12 movement processes.
Working principle:
Be arranged on the recovery limit casing 13 and the spacing cone 22 of recovery that is arranged on piston body 12 tops combination when the recovery stroke is larger of guider 14 bottoms, rod chamber 35 inner fluids are closed, oil liquid pressure in the chamber rises, and makes damping force become large, and then produces the recovery position-limiting action.
Compression limit damping axle 7 on the bottom valve device is when compression stroke is larger, and the flowing valve passage 8 compressed limit damping axles 7 on the stream piston rod 18 block, and the oil liquid pressure in the rodless cavity 36 rises, and makes damping force become large, and then produces the compression position-limiting action;
By having consisted of a compression spacing one-way valve after valve gap 1, bottom valve body 4, compression limit damping axle 7 and steel ball 28 assemblings, its role is to when piston body 12 damping contracting limit damping axles 7 form the spacing power of compression, center hole 34 by compression limit damping axle 7 carries out repairing in rod chamber 35, in order to avoid ensuing recovery stroke forms idle running.
Accompanying drawing 3 is the laboratory data (indicator diagram) of the present invention in stand test
The indicator diagram abscissa be piston 12 with respect to the displacement of bitubular oil cylinder, y coordinate is the ouput force of vibration damper, transverse axis top is for restoring stroke, the below is compression stroke.Relative velocity is sinusoidal variations in whole movement process, and peak value appears at transverse axis place at zero point.
Vibration damper restore stroke when reaching spacing position (b point place on the curve) be arranged on the recovery limit casing 13 of guider 14 bottoms and be arranged on spacing cone 22 combinations of recovery on piston body 12 tops, produce the spacing power of restoring.Be presented as that in laboratory data the vibration damper ouput force increases with displacement.
Vibration damper carry out compression stroke when reaching spacing position the flowing valve passage 8 compressed limit damping axles 7 on (a point place on the curve) stream piston rod 18 block, the oil liquid pressures in the rodless cavity 36 rise, and make damping force become large, and then produce the compression position-limiting action.Be presented as that in laboratory data the vibration damper ouput force increases with displacement.
Claims (3)
1. Bidirectional hydraulic limit shock absorber, this vibration damper comprises: bitubular oil cylinder, piston apparatus, bottom valve device is characterized in that: limit casing (13) is restored with one in guider (14) lower end on the described bitubular oil cylinder; Spacing centrum (22) is restored with one in piston body on the piston apparatus (12) upper end, and the flowing valve passage (8) on the piston rod (18) is upper with repairing hole (33), and repairing hole (33) are communicated with clutch release slave cylinder (29); Described bottom valve device comprises that the foot valve seat (3) and the bottom valve that are arranged on below the clutch release slave cylinder (29) cover (5), be arranged on the bottom valve body (4) on the bottom valve spring (6) of being set with in the bottom valve lid (5), be arranged on bottom valve body (4) following compression valve block (2) and valve gap (1), be arranged on the compression limit damping axle (7) in bottom valve body (4) center hole, below bottom valve body (4) center hole, be provided with steel ball (28), valve gap (1) in the cavity between compression limit damping axle (7) and the valve gap (1), bottom valve body (4), consisted of a compression spacing one-way valve after compression limit damping axle (7) and steel ball (28) assembling.
2. a kind of Bidirectional hydraulic limit shock absorber according to claim 1 is characterized in that: described compression limit damping axle (7) is the hollow shaft with center hole (34), and compression limit damping axle (7) upper end is the centrum part with tapering.
3. a kind of Bidirectional hydraulic limit shock absorber according to claim 1 is characterized in that: the mode that adopts Spielpassung between described bottom valve body (4) and the bottom valve lid (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110245924.4A CN102954142B (en) | 2011-08-25 | 2011-08-25 | bidirectional hydraulic limit shock absorber |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110245924.4A CN102954142B (en) | 2011-08-25 | 2011-08-25 | bidirectional hydraulic limit shock absorber |
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| CN102954142A true CN102954142A (en) | 2013-03-06 |
| CN102954142B CN102954142B (en) | 2016-03-23 |
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| CN201110245924.4A Active CN102954142B (en) | 2011-08-25 | 2011-08-25 | bidirectional hydraulic limit shock absorber |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106382327A (en) * | 2016-11-25 | 2017-02-08 | 广东技术师范学院 | Resonance-peak-free hydraulic vibration isolator and vibration reducing module thereof |
| CN106523574A (en) * | 2016-10-13 | 2017-03-22 | 湖南大学 | Multiple operating condition damping self-adaption hydro-pneumatic spring and control method thereof |
| CN109798321A (en) * | 2019-02-21 | 2019-05-24 | 浙江戈尔德减振器股份有限公司 | The external bidirectional damper regulating valve of automobile absorber |
| CN111971488A (en) * | 2018-04-27 | 2020-11-20 | 天纳克汽车经营有限公司 | Damper bumper cover with labyrinth air passage |
| CN112984027A (en) * | 2021-04-16 | 2021-06-18 | 吉林大学 | Damping-controllable bidirectional-acting cylinder type shock absorber piston |
Citations (7)
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| US4624346A (en) * | 1983-07-20 | 1986-11-25 | Creusot-Loire | Multi-ratio hydraulic energy dissipater |
| JPH06101735A (en) * | 1992-09-17 | 1994-04-12 | Tokico Ltd | Hydraulic damper |
| KR20020040313A (en) * | 2000-11-24 | 2002-05-30 | 밍 루 | Stopper of a shock absorber |
| CN1554875A (en) * | 2003-12-29 | 2004-12-15 | 杰 陆 | Damper after changing damp |
| CN2931926Y (en) * | 2006-01-20 | 2007-08-08 | 陆凯 | Variable damping oil/gas separated shock absorber |
| CN200971945Y (en) * | 2006-11-21 | 2007-11-07 | 陆凯 | Double-changed damping shock-absorber |
| CN202194990U (en) * | 2011-08-25 | 2012-04-18 | 长春孔辉汽车科技有限公司 | Bidirectional hydraulic limit shock absorber |
-
2011
- 2011-08-25 CN CN201110245924.4A patent/CN102954142B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4624346A (en) * | 1983-07-20 | 1986-11-25 | Creusot-Loire | Multi-ratio hydraulic energy dissipater |
| JPH06101735A (en) * | 1992-09-17 | 1994-04-12 | Tokico Ltd | Hydraulic damper |
| KR20020040313A (en) * | 2000-11-24 | 2002-05-30 | 밍 루 | Stopper of a shock absorber |
| CN1554875A (en) * | 2003-12-29 | 2004-12-15 | 杰 陆 | Damper after changing damp |
| CN2931926Y (en) * | 2006-01-20 | 2007-08-08 | 陆凯 | Variable damping oil/gas separated shock absorber |
| CN200971945Y (en) * | 2006-11-21 | 2007-11-07 | 陆凯 | Double-changed damping shock-absorber |
| CN202194990U (en) * | 2011-08-25 | 2012-04-18 | 长春孔辉汽车科技有限公司 | Bidirectional hydraulic limit shock absorber |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106523574A (en) * | 2016-10-13 | 2017-03-22 | 湖南大学 | Multiple operating condition damping self-adaption hydro-pneumatic spring and control method thereof |
| CN106382327A (en) * | 2016-11-25 | 2017-02-08 | 广东技术师范学院 | Resonance-peak-free hydraulic vibration isolator and vibration reducing module thereof |
| CN111971488A (en) * | 2018-04-27 | 2020-11-20 | 天纳克汽车经营有限公司 | Damper bumper cover with labyrinth air passage |
| CN109798321A (en) * | 2019-02-21 | 2019-05-24 | 浙江戈尔德减振器股份有限公司 | The external bidirectional damper regulating valve of automobile absorber |
| CN109798321B (en) * | 2019-02-21 | 2024-04-12 | 浙江戈尔德智能悬架股份有限公司 | External two-way damping regulating valve of automobile shock absorber ware |
| CN112984027A (en) * | 2021-04-16 | 2021-06-18 | 吉林大学 | Damping-controllable bidirectional-acting cylinder type shock absorber piston |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102954142B (en) | 2016-03-23 |
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Address after: 130012 Jilin province Changchun Chaoda high tech Industrial Development Zone, Road No. 5177 Applicant after: KH AUTOMOTIVE TECHNOLOGIES (CHANGCHUN) CO.,LTD. Address before: 130012 Jilin province Changchun Chaoda high tech Industrial Development Zone, Road No. 5177 Applicant before: KH AUTOMOTIVE TECHNOLOGIES (CHANGCHUN) Co.,Ltd. |
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Effective date of registration: 20230802 Address after: 313000 Building 1, No. 788 Xifeng Road, South Taihu New District, Wuxing District, Huzhou City, Zhejiang Province Patentee after: Zhejiang Kong Hui Automobile Technology Co.,Ltd. Address before: No. 5177 Chaoda Road, High tech Industrial Development Zone, Changchun City, Jilin Province, 130012 Patentee before: KH AUTOMOTIVE TECHNOLOGIES (CHANGCHUN) CO.,LTD. |
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