CN102072274A - Piston valve structure for damper - Google Patents
Piston valve structure for damper Download PDFInfo
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- CN102072274A CN102072274A CN 201110029820 CN201110029820A CN102072274A CN 102072274 A CN102072274 A CN 102072274A CN 201110029820 CN201110029820 CN 201110029820 CN 201110029820 A CN201110029820 A CN 201110029820A CN 102072274 A CN102072274 A CN 102072274A
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Abstract
The invention relates to dampers applied to motor vehicles, in particular to a piston valve structure for a damper. The technical scheme is that: the piston valve structure for the damper comprises a rebound valve plate, a valve body with an axial fluid channel, and a compression valve plate, which are sleeved on a piston rod, wherein the components are fastened on the piston rod through nuts; bosses are arranged at two ends of the valve body; and the bosses and the valve plates are matched with two end faces of the valve body, and a radial fluid channel is added for each axial fluid channel. The piston valve structure ensures that the damper meets the requirements on low speed and high damping so as to make up for the defect of prior art.
Description
Technical field
The present invention relates to be applied to the vibration damper in the motor vehicle, particularly a kind of shock absorber piston valve arrangement.
Background technique
Hydraulic damper is the critical elements of automotive suspension system, the good and bad car load rideability and the class of directly influencing of its performance.
The function and the working principle of vibration damper are: during vehicle driving, because the vibrations that produce vehicle body are disturbed in the face of hitting of wheel in ground, vibration damper is as the hydraulic element of vehicle suspension system, and is reciprocating between vehicle body and wheel with the wheel vibrations, absorbs and switching energy; The vibration damper acting is reciprocating in cylinder barrel by piston, and the fluid in the tube changes with piston position, is the fine pore throttling by piston valve, constantly changes the position, chamber.Fluid is in when motion, because the interior friction of the friction of throttle orifice and liquid and fluid molecule forms the damping to the vehicle vibrations, and shock energy is converted to heat energy distributes, thereby reduce the vehicle vibration frequency, improves the steady and travelling comfort of vehicle driving.
Along with the development of car industry, more and more higher to the vibration damper performance demands.
According to damping force formula: Δ P=1/2 ρ (Q/A)
2
In the formula: Δ P-damping force, ρ-fluid density coefficient, A-orifice size, Q-flow;
Hence one can see that: damping force Δ P depends on orifice size A; P is more little for the big more damping force Δ of its orifice size A; Otherwise damping force Δ P is big more; And when orifice size A little to a certain degree the time, hydraulic system produces turbulent flow, under required work done velocity conditions, throttle orifice is to the shearing throttling of work done fluid, the liquid turbulent skin friction that is produced must cause the oil temperature to rise, therefore, when reality is used, the stability and the working life of hydraulic system work done will be reduced.
By pascal's principle flow fundamental formular: Q=V*A as can be known;
In the formula: Q--flow, V--flow velocity, A--orifice size;
With Q=V*A substitution Δ P=1/2 ρ (Q/A)
2
: Δ P=1/2 ρ V
2
Hence one can see that, and damping force diminishes with the reduction of speed, as V≤0.05m ﹒ s
-1
Low speed will realize big damping effect the time, hydraulic system kinetic energy can not reach functional requirement.
Thereby, the vibration damper of existing thin-walled orifice restriction can not satisfy the needs of current car industry, as China Patent No. is 200920201404.1 the disclosed a kind of automobile absorber piston of patent of invention, and it is described below: a kind of automobile absorber piston, and it comprises piston only; Described piston only is provided with damping hole; Described piston only is formed by first piston body and the compacting of second piston only; Damping hole on the described first piston body comprises outer ring damping hole worker and inner ring damping hole worker; The radial distance at described outer ring damping hole worker and first piston body center is greater than the radial distance at inner ring damping hole worker and first piston body center; Damping hole on described second piston only comprises outer ring damping hole II and inner ring damping hole II; The radial distance at the described outer ring damping hole II and the second piston only center is greater than the radial distance at the inner ring damping hole II and the second piston only center; Described outer ring damping hole worker, outer ring damping hole II, inner ring damping hole worker and inner ring damping hole II include and are holistic axial component and incline section; Described outer ring damping hole worker's incline section communicates with the incline section of inner ring damping hole II; The incline section of described outer ring damping hole II communicates with inner ring damping hole worker's incline section.
Above-mentioned piston structure is formed by two body compactings, and as seen its production technology is cumbersome; And the damping hole on the body all has axial component and incline section, has then further increased the loaded down with trivial details degree of production of this piston; What is more important adopts the vibration damper of above-mentioned piston can not reach the effect of low speed, big damping, and can not satisfy the requirement of present automobile industry to vibration damper.
Summary of the invention
The purpose of this invention is to provide a kind of damper piston valve arrangement that can make vibration damper satisfy low speed, big damping requirement, to remedy disadvantages of background technology.
Above-mentioned technical purpose of the present invention is achieved by the following technical programs: a kind of shock absorber piston valve arrangement, it comprise socket and be fixed in the valve body of piston rod one end, with the piston rod socket and be divided into the valve block at valve body two ends; Two ends of valve body is respectively compression end and restores end, and the valve block of compression end is the compression valve block, and the valve block that restores end is for restoring valve block; Valve body is provided with a plurality of axial fluid passages that run through valve body, is respectively the compression axial fluid passage and restores axial fluid passage, and described compression end end face is installed with the compression boss, and described recovery end end face is installed with the recovery boss; Have a plurality of compression breach on the compression boss, have a plurality of recovery breach on the recovery boss; Described compression axial fluid passage one end opening is in the compression breach, and the other end is opened on the recovery raised head face; Described recovery axial fluid passage one end opening is in restoring breach, and the other end is opened on the compression raised head face; Compress and be positioned at compression indentation, there formation compression radial fluid passages between valve block and the compression end end face, be positioned at the recovery indentation, there between recovery valve block and the recovery end end face and form the recovery radial fluid passages.
The present invention is provided with boss respectively in two ends of valve body, the cooperation of boss, valve block, valve body both ends of the surface, for each axial fluid passage has increased a radial fluid passages, thereby, use vibration damper of the present invention when work, under the state of piston valve travelling speed same as the prior art, the damping force that the damping force that the present invention produced produces greater than prior art is used the requirement that vibration damper of the present invention can reach the big damping of low speed thereby make; During compression work, restore axial fluid passage owing to the obstruct of compression valve block is sealed, fluid enters compressed axial fluid passage and backs down the recovery valve block from the compression radial fluid passages, flows out from restore the gap between valve block and the recovery boss then; During recovery operation, the compression axial fluid passage is owing to the obstruct of restoring valve block is sealed, and fluid enters through restoring axial fluid passage and backing down the compression valve block from restoring radial fluid passages, flows out the gap between compression valve block and compression boss then.
As of the present invention preferred, have on the described compression boss and restore the recovery fluid that axial fluid passage communicates and stitch; Have on the described recovery boss and compress the compressed fluid seam that axial fluid passage communicates.
Too small when the piston valve travelling speed, when the impulse force that rate of flow of fluid brought was not enough to back down corresponding valve block, fluid can flow out from corresponding fluid seam, to satisfy the demand of damping force.
As of the present invention preferred, all restore axial fluid passage medial axis and equate with distance between the valve body medial axis; All compression axial fluid passage medial axis equate with distance between the valve body medial axis; And the distance between all recovery axial fluid passage medial axis and the valve body medial axis equals the distance between all compression axial fluid passage medial axis and the valve body medial axis.
Above-mentioned setting mainly is to use vibration damper of the present invention no matter during in compression or during recovery operation in order to make, and equates that at piston valve under the situation of travelling speed, the damping force that is produced equates.
As of the present invention preferred, this kind piston valve construction also comprises two groups of shim pack that are placed on the piston rod, is respectively the compression gasket group and restores shim pack; The compression gasket group comprise with the compression valve block closely contact and will compress compression minipad that valve block is pressed in the compression boss, with compress the tight big pad of compression that contacts of minipad; Restore shim pack comprise with restore valve block closely contact and will restore valve block be pressed in the recovery boss the recovery minipad, with the tight big pad of recovery that contacts of recovery minipad; The radius of compression minipad is less than the radius of compression valve block, and the radius that restores minipad is less than the radius that restores valve block.
The radius of two minipads is less than the setting of corresponding valve block radius, is in order to guarantee that the fluid impulse force can back down corresponding valve block under the state of certain rate of flow of fluid, the damping force that meets the demands with generation; Simultaneously, under the certain situation of piston valve travelling speed, regulate the radius of minipad, can also regulate the size of damping force, thereby satisfy the requirement of different automobile types.
As of the present invention preferred, described compression axial fluid passage respectively has 6 with the recovery axial fluid passage, is uniformly distributed on the valve body, and is provided with a recovery axial fluid passage between per two compression axial fluid passages.
In sum, the present invention has following beneficial effect:
1, valve body structure of the present invention is simple, and production technology is simple than background technique, and the fluid passage in the valve body is straight, and therefore production technology of the present invention is more simple than background technique;
2, the boss at valve block two ends can be connected with the valve body one, casts in the lump in same mould, and it is simple to further specify production technology of the present invention, easy to implement;
3, in process of production, the thickness of boss is easy to control, makes and uses vibration damper of the present invention in use, and the damping force of generation is reliable and stable;
4, use the effect that vibration damper of the present invention can be realized low speed, big damping, satisfied automobile industry now is to the tight requirement of the high standard of vibration damper;
5, long service life of the present invention, it is reliable and stable to use vibration damper work done of the present invention.
Description of drawings
Fig. 1 is the example structure schematic representation;
Fig. 2 is a valve body compression end structural representation;
Fig. 3 is that valve body restores the end structure schematic representation.
Among the figure, 1, piston rod, 11, big column, 12, small column, 13, step surface, 2, valve body, 21, compression end, 22, restore end, 23, groove, 31, the compression valve block, 32, restore valve block, 41, the compression axial fluid passage, 42, restore axial fluid passage, 211, the compression boss, 221, restore boss, 2111, the compression breach, 2211, restore breach, 411, the compression radial fluid passages, 421, restore radial fluid passages, 422, recovery fluid seam, 412, the compressed fluid seam, 51, the compression minipad, 52, compress big pad, 61, restore minipad, 62, restore big pad, 7, nut, 8, teflin tape.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
This specific embodiment only is an explanation of the invention; it is not a limitation of the present invention; those skilled in the art can make the modification that does not have creative contribution to present embodiment as required after reading this specification, but as long as all are subjected to the protection of Patent Law in claim scope of the present invention.
As shown in Figure 1, piston rod 1 is made up of radius bigger big column 11 and the less small column 12 of radius, big column 11 forms a step with the joint of small column 12, claims that the big column 11 and the face that joins of small column 12 are step surface 13, and small column 12 is provided with screw thread.
Embodiment: a kind of shock absorber piston valve arrangement, referring to Fig. 1, from top to down, it comprises recovery shim pack, recovery valve block 32, valve body 2, compression valve block 31, the compression gasket group that all is socketed on successively on the small column 12, and these a little structures are anchored on the small column 12 by nut 7; Fig. 1 sees that from top to down the two ends of valve body 2 are respectively restores end 22 and compression end 21; The side of valve body 2 also is coated with teflin tape 8, for improving teflin tape 8 and the tightness that valve body 2 coats, makes embodiment when work, and teflin tape 8 is difficult for throwing off, and the side of valve body 2 has many grooves 23.
Fig. 1 sees from top to down, restore shim pack comprise the big pads 62 of recovery that closely contacts with step surface 13, with the recovery valve block 32 tight recovery minipads 61 that contact; The big pad 52 of compression that the compression gasket group comprises the compression minipads 51 that closely contact with compression valve block 31, closely contacts with nut 7 end faces; The radius that restores minipad 61 is less than the radius that restores valve block 32; The radius of compression minipad 51 is less than the radius of compression valve block 31; Under the certain situation of piston valve travelling speed, regulate the radius of compression minipad 51 and recovery minipad 61, can also regulate the size of damping force, thereby satisfy the requirement of different automobile types.
Referring to 1 to 3, valve body 2 is provided with a plurality of axial fluid passages that run through valve body 2, is respectively compression axial fluid passage 41 and restores axial fluid passage 42.
Referring to Fig. 2, compression end 21 end faces are installed with compression boss 211, have a plurality of compression breach 2111 on the compression boss 211; In conjunction with Fig. 2 and Fig. 3, can find out that compression axial fluid passage 41 1 end openings are in compression breach 2111, the other end is opened on and restores boss 221 end faces.
Referring to Fig. 3, restore end 22 end faces and be installed with recovery boss 221; Restore on the boss 221 and have a plurality of recovery breach 2211; In conjunction with Fig. 2 and Fig. 3, can find out that restore axial fluid passage 42 1 end openings in restoring breach 2211, the other end is opened on compression boss 211 end faces.
In conjunction with Fig. 1 to 3, can find out, compress and be positioned at formation compression radial fluid passages 411 in compression breach 2111 places between valve block 31 and compression end 21 end faces, be positioned at recovery breach 2211 places between recovery valve block 32 and recovery end 22 end faces and form recovery radial fluid passages 421.
Referring to Fig. 2, compression has on the boss 211 and restores the recovery fluid that axial fluid passage 42 communicates and stitch 422; Referring to Fig. 3, have and compress the compressed fluid seam 412 that axial fluid passage 41 communicates on the recovery boss 221.
When still be recovery operation during in compression no matter in order to make the vibration damper of using present embodiment, equate at piston valve under the situation of travelling speed that the damping force that is produced equates, all recovery axial fluid passage 42 medial axis equate with distance between valve body 2 medial axis; All compression axial fluid passage 41 medial axis equate with distance between valve body 2 medial axis; And the distance between all recovery axial fluid passage 42 medial axis and valve body 2 medial axis equals the distance between all compression axial fluid passage 41 medial axis and valve body 2 medial axis.
In conjunction with Fig. 2,3, can find out, compression axial fluid passage 41 respectively has 6 with recovery axial fluid passage 42, and the damping force equilibrium that is produced when working for the vibration damper that makes this enforcement of application, 12 axial fluid passages are uniformly distributed on the valve body 2, and are provided with a recovery axial fluid passage 42 between per two compression axial fluid passages 41.
The shock absorber fluids of using this enforcement flows to as follows: when using the vibration damper compression work of this enforcement, restore axial fluid passage 42 owing to the obstruct of compression valve block 31 is sealed, fluid enters compressed axial fluid passage 41 and backs down recovery valve block 32 from compression radial fluid passages 411, flows out from restore the gap between valve block 32 and the recovery boss 221 then; When using the vibration damper recovery operation of this enforcement, compression axial fluid passage 41 is owing to the obstruct of restoring valve block 32 is sealed, fluid enters through restoring axial fluid passage 42 and backing down compression valve block 31 from restoring radial fluid passages 421, flows out the gap between compression valve block 31 and compression boss 211 then.
Claims (5)
1. shock absorber piston valve arrangement, it comprise socket and be fixed in the valve body of piston rod (1) one end (2), with piston rod (1) socket and be divided into the valve block at valve body (2) two ends; The two ends of valve body (2) are respectively compression end (21) and restore end (22), and the valve block of compression end (21) is compression valve block (31), and the valve block that restores end (22) is for restoring valve block (32); Valve body (2) is provided with a plurality of axial fluid passages that run through valve body (2), be respectively compression axial fluid passage (41) and restore axial fluid passage (42), it is characterized in that, described compression end (21) end face is installed with compression boss (211), and described recovery end (22) end face is installed with and restores boss (221); Have a plurality of compression breach (2111) on the compression boss (211), have a plurality of recovery breach (2211) on the recovery boss (221); Described compression axial fluid passage (41) one end openings are in compression breach (2111), and the other end is opened on and restores boss (221) end face; Described recovery axial fluid passage (42) one end openings are in restoring breach (2211), and the other end is opened on compression boss (211) end face; Be positioned at compression breach (2111) between compression valve block (31) and compression end (21) end face and locate to form compression radial fluid passages (411), restore valve block (32) and restore breach (2211) and locate formation recovery radial fluid passages (421) with restoring to be positioned between end (22) end face.
2. a kind of shock absorber piston valve arrangement according to claim 1 is characterized in that, has on the described compression boss (211) and restores the recovery fluid seam (422) that axial fluid passage (42) communicates; Have on the described recovery boss (221) and compress the compressed fluid seam (412) that axial fluid passage (41) communicates.
3. a kind of shock absorber piston valve arrangement according to claim 1 and 2 is characterized in that, all restore axial fluid passage (42) medial axis and equate with distance between valve body (2) medial axis; All compression axial fluid passage (41) medial axis equate with distance between valve body (2) medial axis; And the distance between all recovery axial fluid passage (42) medial axis and valve body (2) medial axis equals the distance between all compression axial fluid passage (41) medial axis and valve body (2) medial axis.
4. a kind of shock absorber piston valve arrangement according to claim 3 is characterized in that, this kind piston valve construction also comprises two groups of shim pack that are placed on the piston rod (1), is respectively the compression gasket group and restores shim pack; The compression gasket group comprise with compression valve block (31) closely contact and will compress compression minipad (51) that valve block (31) is pressed in compression boss (211), with compress the tight big pad of compression (52) that contacts of minipad (51); Restore shim pack comprise with restore valve block (32) closely contact and will restore valve block (32) be pressed in recovery boss (221) recovery minipad (61), with the tight big pad of recovery (62) that contacts of recovery minipad (61); The radius of compression minipad (51) is less than the radius of compression valve block (31), and the radius that restores minipad (61) is less than the radius that restores valve block (32).
5. according to claim 1 or 2 or 4 described a kind of shock absorber piston valve arrangements, it is characterized in that, described compression axial fluid passage (41) respectively has 6 with recovery axial fluid passage (42), be uniformly distributed on the valve body (2), and be provided with a recovery axial fluid passage (42) between per two compression axial fluid passages (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110029820 CN102072274A (en) | 2011-01-27 | 2011-01-27 | Piston valve structure for damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110029820 CN102072274A (en) | 2011-01-27 | 2011-01-27 | Piston valve structure for damper |
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|---|---|
| CN102072274A true CN102072274A (en) | 2011-05-25 |
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ID=44030953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110029820 Pending CN102072274A (en) | 2011-01-27 | 2011-01-27 | Piston valve structure for damper |
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|---|---|
| CN (1) | CN102072274A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105041951A (en) * | 2015-07-10 | 2015-11-11 | 江苏南铸科技股份有限公司 | Shock absorption valve |
| CN105940238A (en) * | 2014-01-28 | 2016-09-14 | Zf腓特烈斯哈芬股份公司 | Vibration damper, and piston valve for vibration damper |
| CN110513426A (en) * | 2019-09-24 | 2019-11-29 | 杭州金士顿实业有限公司 | High stability large-diameter damper |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101008429A (en) * | 2006-01-23 | 2007-08-01 | 株式会社万都 | Shock absorber for achieving linear damping force characteristics |
| US20090000888A1 (en) * | 2007-06-29 | 2009-01-01 | Mcandrews Michael | Bicycle damper |
| KR20100023076A (en) * | 2008-08-21 | 2010-03-04 | 주식회사 만도 | Piston valve of shock absorber |
| CN201651150U (en) * | 2010-02-12 | 2010-11-24 | 北京科冠车辆新技术开发有限公司 | Hydraulic vibration absorber for high-speed railway vehicle |
| CN201908987U (en) * | 2011-01-27 | 2011-07-27 | 浙江路得坦摩汽车悬架系统有限公司 | Shock absorber piston valve structure |
-
2011
- 2011-01-27 CN CN 201110029820 patent/CN102072274A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101008429A (en) * | 2006-01-23 | 2007-08-01 | 株式会社万都 | Shock absorber for achieving linear damping force characteristics |
| US20090000888A1 (en) * | 2007-06-29 | 2009-01-01 | Mcandrews Michael | Bicycle damper |
| KR20100023076A (en) * | 2008-08-21 | 2010-03-04 | 주식회사 만도 | Piston valve of shock absorber |
| CN201651150U (en) * | 2010-02-12 | 2010-11-24 | 北京科冠车辆新技术开发有限公司 | Hydraulic vibration absorber for high-speed railway vehicle |
| CN201908987U (en) * | 2011-01-27 | 2011-07-27 | 浙江路得坦摩汽车悬架系统有限公司 | Shock absorber piston valve structure |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105940238A (en) * | 2014-01-28 | 2016-09-14 | Zf腓特烈斯哈芬股份公司 | Vibration damper, and piston valve for vibration damper |
| CN105940238B (en) * | 2014-01-28 | 2018-03-27 | Zf腓特烈斯哈芬股份公司 | Shock absorber and the piston valve for shock absorber |
| CN105041951A (en) * | 2015-07-10 | 2015-11-11 | 江苏南铸科技股份有限公司 | Shock absorption valve |
| CN110513426A (en) * | 2019-09-24 | 2019-11-29 | 杭州金士顿实业有限公司 | High stability large-diameter damper |
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Application publication date: 20110525 |