CN102954142B - bidirectional hydraulic limit shock absorber - Google Patents
bidirectional hydraulic limit shock absorber Download PDFInfo
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- CN102954142B CN102954142B CN201110245924.4A CN201110245924A CN102954142B CN 102954142 B CN102954142 B CN 102954142B CN 201110245924 A CN201110245924 A CN 201110245924A CN 102954142 B CN102954142 B CN 102954142B
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Abstract
The present invention relates to a kind of Bidirectional hydraulic limit shock absorber on automotive suspension, this vibration damper comprises: Double-barrel oil cylinder, piston apparatus, bottom valve device, and limit casing is restored with one in the guider lower end in described Double-barrel oil cylinder; Spacing centrum is restored with one in piston body upper end on piston apparatus, and with repairing hole on the flowing valve passage on piston rod, repairing hole is communicated with clutch release slave cylinder; Described bottom valve device comprises and is arranged on foot valve seat below clutch release slave cylinder and bottom valve lid, be arranged on the bottom valve body be set with on bottom valve spring in bottom valve lid, be arranged on the compression valve block below bottom valve body and valve gap, be arranged on the compression limit damping axle in bottom valve body center hole, be provided with steel ball in cavity below bottom valve body center hole, between compression limit damping axle and valve gap, after valve gap, bottom valve body, compression limit damping axle and steel ball assembling, constitute a compression spacing one-way valve.
Description
Technical field
The present invention relates to a kind of double-drum type vibration damper on automotive suspension, specifically a kind of Bidirectional hydraulic limit shock absorber.
Background technique
Automotive suspension is equipped with usually the run distance caging device (buffer stopper) be made up of rubber, when being used for preventing large-amplitude vibration, the associated components such as vehicle body, suspension is subject to strong shock., there is a serious shortcoming in this structure playing position-limiting action by elasticity, is exactly that the energy that absorbs of its compressive strain can discharge in ensuing recovery stroke, thus can not sponges impact rapidly.
At present, be widely used in the vibration damper on automotive suspension, its resistance depends on upper and lower connecting end speed of related movement usually, and damping force and stroke are irrelevant and only and velocity correlation.Very little to movement velocity in extreme limit of travel phase, the damping thus produced 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 form, bottom valve body is connected on 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 describes 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, change until maximum value can due to damping shaft blocking piston flowing valve at its compression damping, vibration damper rod chamber repairing deficiency is caused to produce vacuum, the generation of vacuum can make 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 bottom vibration damper, in vibration damper using process, piston produces wearing and tearing, radial clearance strengthens, piston inevitably produces certain radial deflection, when damping shaft is fixing, light then accelerate damping shaft wearing and tearing, heavy then damping shaft and damping core retainer plate cannot coordinate smoothly make damping shaft produce bend.Three, its bottom valve is provided with oil through and compression valve block, damping shaft blocking piston flowing valve at present cavity pressure cannot promote in a large number (because oil can release from bottom valve valve block), this structure theory can only make compression damping produce piston area and rod areas only than lifting, and because rodless cavity pressure cannot obviously promote, make compression damping control easily in practice.
The recovery limit method of existing vibration damper inside two kinds nothing more than, damping rubber block or damping spring, these two kinds of limit methods all only play the effect relaxing and impact, and can not sponge the energy impacting and produce, and these energy can be turned back in system in backhaul.Therefore the shock absorber structure designing a kind of impact energy effectively absorbed in recovery stroke seems particularly important.
Current vibration damper limit due to structure, and on piston, rebuilt valve passage is all distributed in inner ring and flowing valve passage is distributed in piston outer shroud, and this makes to restore hydraulic stop and is difficult to realize.
Summary of the invention
The object of the invention is to provide the mode that a kind of same limit vehicle body improving car load smoothness crosses violent oscillatory motion, compression damping can be regulated simultaneously and restore damping and adjustable degree is large, the work carrying out mating for vibration damper and car load provides a kind of new thinking, while suitably reducing normal travel damping, the damping with stroke change is utilized to move stroke to the acceleration and suspension that control vehicle body.
The object of the present invention is achieved like this, and this vibration damper comprises: Double-barrel oil cylinder, piston apparatus, bottom valve device, and limit casing is restored with one in the guider lower end in described Double-barrel oil cylinder; Spacing centrum is restored with one in piston body upper end on piston apparatus, and with repairing hole on the flowing valve passage on piston rod, repairing hole is communicated with clutch release slave cylinder; Described bottom valve device comprises and is arranged on foot valve seat below clutch release slave cylinder and bottom valve lid, be arranged on the bottom valve body be set with on bottom valve spring in bottom valve lid, be arranged on the compression valve block below bottom valve body and valve gap, be arranged on the compression limit damping axle in bottom valve body center hole, be provided with steel ball in cavity below bottom valve body center hole, between compression limit damping axle and valve gap, after valve gap, bottom valve body, compression limit damping axle and steel ball assembling, constitute a compression spacing one-way valve.
The present invention has the following advantages and good effect:
1, the energy conversion that the present invention is absorbed by damping restriction stroke is that heat energy distributes, thus can attenuation vibration significantly.
2, the bottom valve device structure of the present invention to common double-drum type vibration damper changes, common fixing bottom valve structure is replaced with the floated bottom valve body with hollow shaft, wherein bottom valve device does not establish damping hole, during compression stroke, oil all enters bottom valve device by hollow shaft.When compression stroke is larger, piston can block damping shaft endoporus rodless cavity is closed, and compression damping increases, until rodless cavity is thoroughly closed, compression damping becomes infinitely great in theory.And then form compression position-limiting action.After hollow shaft coordinates with valve passage that piston circulates, unidirectional Fill valve below hollow shaft is opened, the pull of vacuum of rod chamber is utilized to carry out repairing to it, and Floating bottom valve device can carry out trace move radially offset trace skew that two axial lines likely produces bring infringement to hollow shaft and unnecessary friction, to improve the 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 piston rod, entrance is at the rebuilt valve of outer shroud, and upper piston area for restoring spacing cone, the spacing cone of recovery when restoring stroke and being larger on piston can coordinate with the recovery limit casing of guider bottom, block piston valve damping hole, recovery damping force is increased, and form recovery position-limiting action.
4, bottom valve body entirety of the present invention can carry out moving radially of trace, effect is when when compressing spacing, hollow shaft coordinates with valve passage that piston circulates, can carry out trace move radially offset trace skew that two axial lines likely produces bring infringement to hollow shaft and unnecessary friction, to improve the vibration damper life-span.
5, the present invention compress that limit damping axle (hollow shaft) bottom is provided with can the Fill valve of one-way flow, its role is to when piston obstructs compresses the spacing hollow shaft formation spacing power of compression, repairing is carried out to recovery chamber, in order to avoid ensuing recovery stroke forms idle running by the endoporus of hollow shaft.
6, the present invention compresses limit damping axle and can be processed into different taperings, and resistance power can be made in piston movement process to change on demand.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of Bidirectional hydraulic limit shock absorber.
Fig. 2 is bottom valve device part partial enlargement structural representation 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, upper cover 15, oil sealing 19,0 type circle 20, oil storage cylinder 21, clutch release slave cylinder 29 and lower hanger 30 assembling form Double-barrel oil cylinder, wherein guider 14 lower end with one restore limit casing 13;
2., rebuilt valve spring 9, restore valve block lid 10,0 type circle 11, piston body 12, dust-proof cover 16, compression cushion pad 17, lower end form piston apparatus with the piston rod 18 of flowing valve passage 8, flowing valve valve block 23, piston ring 24, piston tightening nut pad 25, reset valve block 26, piston tightening nut 27 and upper hanger 31, wherein spacing centrum 22 is restored with one in piston body 12 upper end, with repairing hole 33 on flowing valve passage 8 on piston rod 18, repairing hole 33 is communicated with clutch release slave cylinder 29;
Shown in accompanying drawing 2: bottom valve device comprises: be arranged on the foot valve seat 3 below clutch release slave cylinder 29 and bottom valve lid 5, be arranged on the bottom valve body 4 being set with bottom valve spring 6 in bottom valve lid 5, be arranged on the compression valve block 2 below bottom valve body 4 and valve gap 1, be arranged on the compression limit damping axle 7 in bottom valve body 4 center hole, described compression limit damping axle 7 is the hollow shaft with center hole 34, below bottom valve body 4 center hole, steel ball 28 is provided with in cavity between compression limit damping axle 7 and valve gap 1, valve gap 1, bottom valve body 4, compression limit damping axle 7 and steel ball 28 constitute a compression spacing one-way valve after assembling.
The mode of Spielpassung is adopted between described bottom valve body 4 and bottom valve lid 5, object is when compressing generation trace skew between limit damping axle 7 and flowing valve passage 8 two axial lines, compression limit damping axle 7 can carry out trace move radially offset the trace skew institute that two axial lines likely produces and bring compressing the infringement of limit damping axle 7 and unnecessary friction, to improve the vibration damper life-span.
Described compression limit damping axle 7 upper end is the pyramidal portion with tapering, and in piston body 12 movement process, compression damping is controlled continuously with stroke change.
Restore spacing cone 22 restore in piston 12 movement process damping with stroke change controlled continuously.
Working principle:
The recovery limit casing 13 being arranged on guider 14 bottom and the spacing cone of recovery 22 being arranged on piston body 12 top combine when restoring stroke and being larger, rod chamber 35 inner fluid is closed, oil liquid pressure in chamber rises, and makes damping force become large, and then produces recovery position-limiting action.
Compression limit damping axle 7 on bottom valve device is when compression stroke is larger, and the flowing valve passage 8 on stream piston rod 18 is blocked by compression limit damping axle 7, and the oil liquid pressure in rodless cavity 36 rises, and makes damping force become large, and then produces compression position-limiting action;
A compression spacing one-way valve is constituted after being assembled by valve gap 1, bottom valve body 4, compression limit damping axle 7 and steel ball 28, its role is to when piston body 12 damping contracting limit damping axle 7 forms the spacing power of compression, in rod chamber 35, repairing is carried out, in order to avoid ensuing recovery stroke forms idle running by the center hole 34 of compression limit damping axle 7.
Accompanying drawing 3 is the laboratory data of the present invention in stand test (indicator diagram)
Indicator diagram abscissa is the displacement of piston 12 relative to Double-barrel oil cylinder, and y coordinate is the ouput force of vibration damper, and for restoring stroke above transverse axis, below is compression stroke.In whole movement process, relative velocity is sinusoidal variations, and peak value appears at transverse axis place at zero point.
Vibration damper carries out restoring the recovery limit casing 13 that (on curve b point place) when stroke reaches restraining position be arranged on guider 14 bottom and the spacing cone 22 of recovery being arranged on piston body 12 top combines, and produces and restores spacing power.Laboratory data being presented as, vibration damper ouput force increases with displacement.
Flowing valve passage 8 that vibration damper carries out (on curve a point place) when compression stroke reaches restraining position flowing on piston rod 18 is blocked by compression limit damping axle 7, and the oil liquid pressure in rodless cavity 36 rises, and makes damping force become large, and then produces compression position-limiting action.Laboratory data being presented as, vibration damper ouput force increases with displacement.
Claims (3)
1. a Bidirectional hydraulic limit shock absorber, this vibration damper comprises: Double-barrel oil cylinder, piston apparatus, bottom valve device, is characterized in that: limit casing (13) is restored with one in guider (14) lower end in described Double-barrel oil cylinder, spacing centrum (22) is restored with one in piston body (12) upper end on piston apparatus, and with repairing hole (33) on the flowing valve passage (8) on piston rod (18), repairing hole (33) are communicated with clutch release slave cylinder (29), described bottom valve device comprises and is arranged on foot valve seat (3) below clutch release slave cylinder (29) and bottom valve lid (5), be arranged on the bottom valve body (4) be set with on bottom valve spring (6) in bottom valve lid (5), be arranged on the compression valve block (2) below bottom valve body (4) 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, steel ball (28) is provided with in cavity between compression limit damping axle (7) and valve gap (1), valve gap (1), bottom valve body (4), a compression spacing one-way valve is constituted 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 pyramidal portion with tapering.
3. a kind of Bidirectional hydraulic limit shock absorber according to claim 1, is characterized in that: the mode adopting Spielpassung between described bottom valve body (4) and 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 |
|---|---|---|---|
| CN201110245924.4A CN102954142B (en) | 2011-08-25 | 2011-08-25 | bidirectional hydraulic limit shock absorber |
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| Publication Number | Publication Date |
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| CN102954142A CN102954142A (en) | 2013-03-06 |
| CN102954142B true CN102954142B (en) | 2016-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110245924.4A Active CN102954142B (en) | 2011-08-25 | 2011-08-25 | bidirectional hydraulic limit shock absorber |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106523574B (en) * | 2016-10-13 | 2018-04-13 | 湖南大学 | A kind of multi-state damping adaptive hydro-pneumatic spring and its control method |
| CN106382327B (en) * | 2016-11-25 | 2018-07-13 | 广东技术师范学院 | A kind of resonance free peak hydraulic antivibration device and its Damping modules |
| US10816055B2 (en) * | 2018-04-27 | 2020-10-27 | Tenneco Automotive Operating Company Inc. | Damper bumper cap with labyrinth air passageway |
| 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 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4624346A (en) * | 1983-07-20 | 1986-11-25 | Creusot-Loire | Multi-ratio hydraulic energy dissipater |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06101735A (en) * | 1992-09-17 | 1994-04-12 | Tokico Ltd | Hydraulic damper |
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2011
- 2011-08-25 CN CN201110245924.4A patent/CN102954142B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4624346A (en) * | 1983-07-20 | 1986-11-25 | Creusot-Loire | Multi-ratio hydraulic energy dissipater |
| 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 |
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| CN102954142A (en) | 2013-03-06 |
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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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Free format text: CORRECT: APPLICANT; FROM: KH AUTOMOTIVE TECHNOLOGIES (CHANGCHUN) CO., LTD. TO: CHANGCHUN KONGHUI AUTOMATIVE TECHNOLOGY 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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