CN201973157U - Multistage damping piston valve of automobile vibration damper - Google Patents
Multistage damping piston valve of automobile vibration damper Download PDFInfo
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- CN201973157U CN201973157U CN 201020698558 CN201020698558U CN201973157U CN 201973157 U CN201973157 U CN 201973157U CN 201020698558 CN201020698558 CN 201020698558 CN 201020698558 U CN201020698558 U CN 201020698558U CN 201973157 U CN201973157 U CN 201973157U
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- 238000013016 damping Methods 0.000 title claims abstract description 111
- 239000006096 absorbing agent Substances 0.000 claims description 18
- 230000035939 shock Effects 0.000 claims description 18
- 238000011084 recovery Methods 0.000 claims description 17
- 238000012856 packing Methods 0.000 claims description 12
- 239000012530 fluid Substances 0.000 claims description 11
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims 1
- 125000006850 spacer group Chemical group 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 230000007704 transition Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009510 drug design Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The utility model relates to a multistage damping piston valve of an automobile vibration damper. The multistage damping piston valve mainly comprises a connecting rod, a spacing check ring, a piston body, a first-stage restoration valve plate group, a second-stage restoration valve plate group, a butterfly spring group, a fastening nut and an adjusting nut, wherein the piston body is sleeved at an end part of the connecting rod, the inner side of the piston body is spaced by the spacing check ring, and the outer side thereof is fastened through the fastening nut; a flow valve spring and a flow valve plate are arranged between the spacing check ring and the piston body; the adjusting nut is arranged at the tail end of the connecting rod; a double-stage low-speed damping valve, a spring check ring, the butterfly spring group and a spacer which are sleeved outside the fastener nut are sequentially arranged between the piston body and the adjusting nut. The utility model has the benefits as follows: as the three-section work area of the F-V restoration damping characteristic curve of the ordinary hydraulic vibration damper at the present is expanded into five sections, the multistage damping force characteristics of the vibration damper is realized, the damping force of the vibration damper in the low-speed area is improved, the overload damping force in the high-speed area is effectively unloaded, and the multistage damping piston valve is more convenient to mount, dissemble and debug.
Description
Technical field
The utility model relates to automobile cylinder type hydraulic vibration damper field, especially a kind of multistage damping piston valve of vehicle shock absorber.
Background technique
Current two-way cylinder type hydraulic vibration damper is used widely in automobile suspension system, dydraulic shock absorber adopts single-stage to restore the valve block group usually, be divided into low speed, middling speed, three sections at a high speed at the damping force-speed characteristic curve in when work, require vibration damper that the damping force of specifying size is provided in the design speed scope.At low speed segment, damping force mainly changes along with the slit area that restores throttle valve plate; Velocity of piston increases gradually, makes to restore valve block and open and carry out off-load, thereby enters the middling speed section, and damping force mainly changes along with throttle slice thickness and packing ring pedestal step; When recovery valve block aperture reaches maximum, enter high regime, damping force mainly changes along with the area of piston hole.Because the damping force of each operation interval produces and the governing factor difference, has discontinuity thereby cause damping force to change.Especially in the transition stage in low velocity zone and middling speed district and since valve block open caused damping force than macromutation.
The low damping force of vibration damper helps to improve ride comfort, but owing to there is the discontinuity point of damping force variation, can have a negative impact to vehicle ride comfort.And if if too small, then can not suppress slowly shaking of car body in the low-speed region damping force, can not suppress cambic attitude and change, will cause significantly shaking, become the factor that influences ride comfort.Therefore require to make the level and smooth transition of damping force of vibration damper, thereby produce comparatively stable damping force in middle tick-over district.
If vibration damper under high speed operation district extreme operating condition is resilience suddenly, especially for motion, off-road vehicle, cause the operating rate of piston too high, damping force raises very fast, to cause great impact pressure to valve block, then can be had a negative impact the working life of vibration damper; Therefore require surpassing specificly during than high operation speed, the piston valve of vibration damper can be realized off-load once more, and the continuing fast of restriction damping force raises.
The model utility content
The utility model will solve the shortcoming of above-mentioned prior art, and a kind of multistage damping piston valve of vehicle shock absorber of the damping force situation of improving vibration damper tick-over district and high speed operation district is provided.
The utility model solves the technological scheme that its technical problem adopts: the multistage damping piston valve of this vehicle shock absorber, mainly comprise connecting rod, spacing back-up ring, piston only, one-level is restored the valve block group, secondary restores the valve block group, the belleville spring group, tightening nut and adjusting nut, piston only is placed in the end of connecting rod, inboard by and spacing by spacing back-up ring, the outside is fixed by tightening nut, be provided with flowing valve spring and flowing valve valve block between spacing back-up ring and the piston only, connecting rod end is provided with adjusting nut, be in series with successively between piston only and the adjusting nut and be sheathed on the outer twin-stage low speed orifice valve of tightening nut, check ring, belleville spring group and pad, wherein twin-stage low speed orifice valve restores the valve block group by one-level, packing ring I, secondary restores the valve block group and packing ring II forms, and can endwisely slip under the situation that overcomes belleville spring group pretightening force.
As preferably, described piston only is provided with uniform a plurality of piston damping holes and piston flow through hole, and wherein the piston damping hole is a clear opening, and the circular groove of being offered on piston flow through hole and the piston only is connected to form the fluid circulation passage.
As preferably, described piston only comprises piston main body and two parts of piston split, and carry out installing and locating by positioning hole and locating stud, piston main body is provided with damping hole I, the piston split is provided with corresponding damping hole II, the slightly larger in diameter of damping hole II is in damping hole I, and piston main body is provided with opening, and can cooperate formation circulation aperture with the piston split.
As preferably, the piston only end flange is provided with three valve line faces, wherein one-level is restored the cooperation that contacts with piston valve line face I, II of valve block group, secondary restores the cooperation that contacts with piston valve line face III of valve block group, valve line face III is than valve line face I, valve line face II height, and valve line face I, valve line face II can be contour or valve line face II is slightly higher than valve line face I.
As preferably, described valve line face II is slightly higher than valve line face I, and one-level is restored valve block group and secondary and restored the valve block group produce pre-compressive strain when installing.
As preferably, the end of connecting rod is that two sections diameters do not wait multidiameter shaft, and one section that diameter is bigger is arranged with spacing back-up ring and piston only, one section tightening nut and adjusting nut that is provided with by screw-thread fit that diameter is little.
As preferably, described one-level is restored the valve block group and is formed by stacking by throttle valve plate I and a plurality of recovery valve block I, and secondary restores the valve block group and is formed by stacking by throttle valve plate II and a plurality of recovery valve block II.
As preferably, the belleville spring group is for to combine with the involutory or superimposed serial fashion of multi-disc belleville spring.
Main beneficial effect of the present utility model has: it is five sections that the hydraulic shock absorber F-V restoration damping characteristics curve that will use always is at present expanded by three sections working areas, has realized the multistage damping force characteristic of vibration damper.Major advantage has:
One, improved the damping force of vibration damper low velocity zone.Adopted the structure of twin-stage low speed orifice valve, vibration damper is in the tick-over district, and firsts and seconds restores the valve block group successively to be opened, and makes damping characteristic curve form different two sections of slope, the damping force of vibration damper is comparatively level and smooth carries out the transition to the middling speed working area, has also improved the integral damping value of low velocity zone.Improve the run smoothness of vehicle thus, suppressed the cambic attitude of vehicle and changed, improved the stability of vehicle.
Two, the overload damping force of effective off-load high velocity.Adopted high speed damping relief arrangement, vibration damper is restoring the travel high-speed working area, if damping force is excessive, reached overload critical damping power, also promptly overcome the pretightening force of belleville spring group, then the belleville spring group is compressed, recovery valve block group, packing ring endwisely slip with the outside of check ring along locking nut, restore to form bigger space between valve block group and the piston damping hole, and fluid circulates in a large number, fluid pressure is discharged, thereby realized off-load; Along with the decline of damping force, the belleville spring resilience promotes check ring and resets with recovery valve block group, then returns to normal working state, vibration damper has been played the effect of protection.
Three, it is all more convenient to install, dismantle and debug.Adopted the dual combination of locking nut and adjusting nut, with the end of connecting rod by screw-thread fit, installing/dismounting is more convenient; By turning adjusting nut, can adjust the pretightening force of belleville spring, thus default easily overload critical damping value.
Description of drawings
Fig. 1 is a piston valve basic structure schematic representation of the present utility model;
Fig. 2 is the structural representation of piston only;
Fig. 3 is the structural representation of piston only assembly;
Fig. 4 is the schematic representation that two groups of valve block precompressed are installed;
Fig. 5 is in low speed segment (two-stage is restored the valve block group and all closed) working procedure schematic representation for multistage damping piston valve;
Fig. 6 is in low speed segment (one-level is restored the valve block group and opened) working procedure schematic representation for multistage damping piston valve;
Fig. 7 is in middling speed section (two-stage is restored the valve block group and all opened) working procedure schematic representation for multistage damping piston valve;
Fig. 8 is existing three sections restoration damping characteristics curves of the common F-V of vibration damper.
Fig. 9 is for using vibration damper F-V multistage restoration damping characteristics curve of the present utility model.
Description of reference numerals: connecting rod 1, spacing back-up ring 2, flowing valve spring 3, circulation valve block 4, piston only 5, valve line face I 5-1, valve line face II5-2, valve line face III 5-3, piston damping hole 5-4, piston flow through hole 5-5, circular groove 5-6, piston main body 5-7, opening 5-7-1, damping hole I 5-7-2, positioning hole 5-7-3, piston split 5-8, circulation aperture 5-8-1, damping hole II 5-8-2, locating stud 5-8-3, one-level is restored valve block group 6, throttle valve plate I 6-1, restore valve block I 6-2, restore packing ring I 7, secondary restores valve block group 8, throttle valve plate II 8-1, restore valve block II 8-2, restore packing ring II 9, check ring 10, belleville spring group 11, pad 12, tightening nut 13, adjusting nut 14.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
Embodiment 1: as Fig. 1,2, the multistage damping piston valve of this vehicle shock absorber, the end of connecting rod 11 is that two sections diameters do not wait multidiameter shaft, one section that diameter is bigger is arranged with spacing back-up ring 2 and piston only 5, one section tightening nut 13 and adjusting nut 14 that is provided with by screw-thread fit that diameter is little, piston only 5 inboards by and spacing by spacing back-up ring 2, the outside is tightened fixing by tightening nut 13, be provided with flowing valve spring 3 and flowing valve valve block 4 between spacing back-up ring 2 and the piston only 5, be in series with the twin-stage low speed orifice valve that is sheathed on outside the tightening nut 13 between piston only 5 and the adjusting nut 14 successively, check ring 10, belleville spring group 11 and pad 12.Wherein twin-stage low speed orifice valve is made up of one-level recovery valve block group 6, packing ring I 7, secondary recovery valve block group 8 and packing ring II9, and under the situation that overcomes belleville spring group 11 pretightening forces, can endwisely slip, one-level is restored valve block group 6 and is formed by stacking by throttle valve plate I 6-1 and 2-3 recovery valve block I 6-2, secondary restores valve block group 8 and is formed by stacking by throttle valve plate II8-1 and 2-3 recovery valve block II8-2, and is supported as distortion by packing ring.Constituted high speed damping relief arrangement by check ring 10, belleville spring group 11, pad 12 and adjusting nut 14.Piston only 5 is provided with and is evenly equipped with 8 piston damping hole 5-4 and 4 piston flow through hole 5-5, and wherein piston damping hole 5-4 is a clear opening, and the circular groove 5-6 that is offered on piston flow through hole 5-5 and the piston only 5 is connected to form the fluid circulation passage.Piston only 5 end flange are provided with three valve line faces, wherein one-level is restored the cooperation that contacts with piston valve line face I 5-1, II 5-2 of valve block group 6, secondary restores the cooperation that contacts with piston valve line face III5-3 of valve block group 8, valve line face III5-3 is than valve line face I 5-1, valve line face II 5-2 height, and valve line face I 5-1, II5-2 is contour for valve line face.
The common damping characteristic curve of the existing vibration damper that uses single-stage to restore the valve block group mainly is divided into following three sections as shown in Figure 8:
I low speed segment (O-A): restore the valve block group and close, damping force is mainly worked by the throttle valve plate slit;
II middling speed section (A-B): restore the valve block group and open, damping force is mainly worked by the aperture of valve block group;
III high regime (B-C): restore valve block group aperture to maximum, damping force is mainly worked by the piston damping hole.
Adopt twin-stage low speed orifice valve of the present utility model, shown in Fig. 5-7, the arrow among the figure represents that piston valve restores the fluid flow direction of stroke to the damper piston valve in the working procedure in low velocity zone and middling speed district.When pistons work speed was very low, two-stage was restored the valve block group and all is in closed condition, and as shown in Figure 5, the slit that this moment, damping force was restored the throttle valve plate in the valve block group by firsts and seconds concurs and provides; Progressively increase along with pistons work speed, fluid pressure also increases thereupon, one-level is restored valve block group 6 and is opened, as shown in Figure 6, damping force was restored the aperture of valve block group 6 and slit that secondary restores the throttle valve plate 8-1 of valve block group 8 by one-level and was concured and provide this moment, and the restoration damping characteristics slope of curve of vibration damper suitably reduces; Pistons work speed further increases, and the pressure of fluid makes secondary restore valve block group 8 and also opens, and as shown in Figure 7, the aperture that this moment, damping force was restored the valve block group by two-stage concurs and provides, and the damper piston valve enters the middling speed working area.
The aperture of restoring the valve block group when two-stage reaches maximum, and the damper piston valve enters the high speed operation district, and damping force was worked by the damping hole 5-4 of piston only 5 and provided this moment, and along with the raising of pistons work speed, damping force also will continue to raise.Owing to adopted high speed damping relief arrangement, preestablished the pretightening force of belleville spring group 11, also be to transship critical damping value at a high speed.If it is excessive that damping force raises, surpassed the overload critical damping value, then overcome the pretightening force of belleville spring group 11, belleville spring group 11 is compressed, and two-stage is restored valve block group 6,8, packing ring 7,9 endwisely slips with the outer surface of check ring 10 along locking nut 13, forms bigger space thereby restore between valve block group 6 and the piston damping hole 5-4, fluid circulates in a large number, fluid pressure is discharged, thereby realized off-load, the restoration damping characteristics curve of vibration damper becomes flat; Along with the decline of damping force, belleville spring 11 resiliences promote check ring 10 and reset with two-stage recovery valve block group, then return to normal working state, thereby vibration damper have been played the effect of protection.
Therefore adopted the vibration damper of twin-stage low speed orifice valve and high speed damping relief arrangement,, can realize damping characteristic curve as shown in Figure 9, formed five sections following working areas by rational design and debugging:
I low speed segment (O-A): two-stage is restored the valve block group and all is in closed condition, and damping force is mainly concured by both throttle valve plate slits;
II low speed segment (A-B): one-level is restored the unlatching of valve block group, and damping force restores the aperture of valve block group by one-level and the throttle valve plate slit of secondary recovery valve block group concurs;
III middling speed section (B-C): two-stage recovery valve block group is all opened, and damping force is mainly concured by the aperture of two-stage recovery valve block group.
IV high regime (C-D): two-stage is restored valve block group aperture to maximum, and damping force is mainly worked by the throttling of piston damping hole.
V high regime (D-E): high speed damping relief arrangement works, and the restoration damping characteristics curve becomes flat.
Embodiment 2: as shown in Figure 3, piston only 5 is divided into piston main body 5-7 and two parts of piston split 5-8 in the multistage damping piston valve of this vehicle shock absorber, and carry out installing and locating by positioning hole 5-7-3 and locating stud 5-8-3, piston main body 5-7 is provided with damping hole I 5-7-2, piston split 5-8 is provided with corresponding damping hole II 5-8-2, the slightly larger in diameter of damping hole II 5-8-2 is in damping hole I 5-7-2, and by optimization to both structures, the circulation aperture 5-8-1 of formation and opening 5-7-1 no-float, it is smooth and easy that fluid is flowed.Remaining part is all identical with embodiment 1.
Embodiment 3: as shown in Figure 4, valve line face II 5-2 is slightly higher than valve line face I 5-1 in the multistage damping piston valve of this vehicle shock absorber, one-level recovery valve block group 6 and secondary restore valve block group 8 when original state is installed thus, promptly produce pre-compressive strain, thereby improve the damping value of the recovery stroke of vibration damper on the whole.Remaining part is all identical with embodiment 1.
Embodiment 4: the belleville spring group 11 in the multistage damping piston valve of this vehicle shock absorber can be selected for use as required, the serial fashion involutory or superimposed with multi-disc carries out appropriate combination, and adjust the pretightening force of belleville spring, thereby the overload critical damping value in default high speed operation district by adjusting nut 13.Remaining part is all identical with embodiment 1.
In addition to the implementation, the utility model can also have other mode of executions.All employings are equal to the technological scheme of replacement or equivalent transformation formation, all drop on the protection domain of the utility model requirement.
Claims (8)
1. the multistage damping piston valve of a vehicle shock absorber, mainly comprise connecting rod (1), spacing back-up ring (2), piston only (5), one-level is restored valve block group (6), secondary restores valve block group (8), tightening nut (13) and adjusting nut (14), it is characterized in that: piston only (5) is placed in the end of connecting rod (1), inboard by and spacing by spacing back-up ring (2), the outside is fixing by tightening nut (13), be provided with flowing valve spring (3) and flowing valve valve block (4) between spacing back-up ring (2) and the piston only (5), connecting rod (1) end is provided with adjusting nut (14), be in series with successively between piston only (5) and the adjusting nut (14) and be sheathed on the outer twin-stage low speed orifice valve of tightening nut (13), check ring (10), belleville spring group (11) and pad (12), wherein twin-stage low speed orifice valve restores valve block group (6) by one-level, packing ring I (7), secondary restores valve block group (8) and packing ring II (9) forms, and can endwisely slip under the situation that overcomes belleville spring group (11) pretightening force.
2. the multistage damping piston valve of vehicle shock absorber according to claim 1, it is characterized by: described piston only (5) is provided with uniform a plurality of piston damping holes (5-4) and piston flow through hole (5-5), wherein piston damping hole (5-4) is a clear opening, and the circular groove of being offered on piston flow through hole (5-5) and the piston only (5) (56) is connected to form the fluid circulation passage.
3. the multistage damping piston valve of vehicle shock absorber according to claim 2, it is characterized by: described piston only (5) comprises piston main body (5-7) and two parts of piston split (5-8), and carry out installing and locating by positioning hole (5-7-3) and locating stud (58-3), piston main body (5-7) is provided with damping hole I (5-7-2), piston split (58) is provided with corresponding damping hole II (5-8-2), the slightly larger in diameter of damping hole II (5-82) is in damping hole I (5-7-2), piston main body (5-7) is provided with opening (5-7-1), and can cooperate formation circulation aperture (5-8-1) with piston split (5-8).
4. the multistage damping piston valve of vehicle shock absorber according to claim 3, it is characterized by: piston only (5) end flange is provided with three valve line faces, wherein one-level is restored valve block group (6) cooperation that contacts with piston valve line face I (5-1), II (5-2), secondary restores valve block group (8) cooperation that contacts with piston valve line face III (5-3), valve line face III (5-3) is higher than valve line face I (5-1), valve line face II (5-2), valve line face I (5-1), valve line face II (5-2) can be contour or valve line face II (5-2) slightly higher than valve line face I (5-1).
5. the multistage damping piston valve of vehicle shock absorber according to claim 4 is characterized by: described valve line face II (5-2) is slightly higher than valve line face I (5-1), and one-level is restored valve block group (6) and secondary and restored valve block group (8) produce pre-compressive strain when installation.
6. the multistage damping piston valve of vehicle shock absorber according to claim 1, it is characterized by: the end of connecting rod (11) is that two sections diameters do not wait multidiameter shaft, one section that diameter is bigger is arranged with spacing back-up ring (2) and piston only (5), one section tightening nut (13) and adjusting nut (14) that is provided with by screw-thread fit that diameter is little.
7. the multistage damping piston valve of vehicle shock absorber according to claim 1, it is characterized by: described one-level is restored valve block group (6) and is formed by stacking by throttle valve plate I (6-1) and a plurality of recovery valve block I (6-2), and secondary restores valve block group (8) and is formed by stacking by throttle valve plate II (8-1) and a plurality of recovery valve block II (8-2).
8. the multistage damping piston valve of vehicle shock absorber according to claim 5, it is characterized by: belleville spring group (11) is for to combine with the involutory or superimposed serial fashion of multi-disc belleville spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020698558 CN201973157U (en) | 2010-12-30 | 2010-12-30 | Multistage damping piston valve of automobile vibration damper |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020698558 CN201973157U (en) | 2010-12-30 | 2010-12-30 | Multistage damping piston valve of automobile vibration damper |
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| CN201973157U true CN201973157U (en) | 2011-09-14 |
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| CN 201020698558 Expired - Fee Related CN201973157U (en) | 2010-12-30 | 2010-12-30 | Multistage damping piston valve of automobile vibration damper |
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| CN102562918A (en) * | 2012-02-28 | 2012-07-11 | 成都九鼎科技(集团)有限公司 | Integral circulating valve of shock absorber |
| CN103016603A (en) * | 2012-12-06 | 2013-04-03 | 力帆实业(集团)股份有限公司 | Inverted rear shock absorber with adjustable precompressed damping force |
| CN103148152A (en) * | 2013-03-15 | 2013-06-12 | 山东理工大学 | Optimization design method for hole diameter and hole number of compression valve seat of hydraulic damper |
| CN103148146A (en) * | 2013-03-08 | 2013-06-12 | 山东理工大学 | Method for designing curve shape of limiting check ring of rebound valve of shock absorber |
| CN103174788A (en) * | 2013-03-20 | 2013-06-26 | 安徽江淮汽车股份有限公司 | Damping control valve and damping adjusting structure of hydraulic absorber |
| WO2013152626A1 (en) * | 2012-04-10 | 2013-10-17 | Fan Yong | Shock absorber, vehicle suspension system and vehicle |
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| CN102562918A (en) * | 2012-02-28 | 2012-07-11 | 成都九鼎科技(集团)有限公司 | Integral circulating valve of shock absorber |
| WO2013152626A1 (en) * | 2012-04-10 | 2013-10-17 | Fan Yong | Shock absorber, vehicle suspension system and vehicle |
| CN103511540B (en) * | 2012-06-21 | 2017-06-23 | Zf腓特烈斯哈芬股份公司 | Adjustable damping valve arrangement |
| CN103511540A (en) * | 2012-06-21 | 2014-01-15 | Zf腓特烈斯哈芬股份公司 | Adjustable damping valve arrangement |
| CN104321554A (en) * | 2012-06-27 | 2015-01-28 | 萱场工业株式会社 | damper valve |
| CN103016603B (en) * | 2012-12-06 | 2014-10-29 | 力帆实业(集团)股份有限公司 | Inverted rear shock absorber with adjustable precompressed damping force |
| CN103016603A (en) * | 2012-12-06 | 2013-04-03 | 力帆实业(集团)股份有限公司 | Inverted rear shock absorber with adjustable precompressed damping force |
| CN103148146B (en) * | 2013-03-08 | 2014-09-03 | 山东理工大学 | Method for designing curve shape of limiting check ring of rebound valve of shock absorber |
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