CN207500382U - A kind of air-bag shock absorber reset buffer means - Google Patents

A kind of air-bag shock absorber reset buffer means Download PDF

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Publication number
CN207500382U
CN207500382U CN201721256944.0U CN201721256944U CN207500382U CN 207500382 U CN207500382 U CN 207500382U CN 201721256944 U CN201721256944 U CN 201721256944U CN 207500382 U CN207500382 U CN 207500382U
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China
Prior art keywords
return spring
piston
shock absorber
air
piston rod
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CN201721256944.0U
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Chinese (zh)
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王山虎
陈洪正
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Zhejiang Roadtamer Auto Parts Ltd By Share Ltd
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Zhejiang Roadtamer Auto Parts Ltd By Share Ltd
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Abstract

A kind of air-bag shock absorber reset buffer means, including housing, piston assembly, positioning device, return spring, it is characterised in that, piston assembly is mounted in housing and is stretched out out of housing, and positioning device and piston assembly are affixed, and return spring is sleeved in Pre strained state in positioning device.Piston assembly includes piston rod and piston head, and piston rod includes ladder and annular groove.Ladder reduces diameter of the piston rod in return spring construction section, so that increase the installation space of return spring in the case where not increasing hull outside size, therefore line footpath and diameter can be selected thicker, length shorter spring reaches the intensity needed for damper, thicker line footpath and diameter increase the lateral stiffness of return spring in structure, return spring is made laterally not bend, scratches piston rod.The utility model has the advantages of simple in structure, excellent working performance, long working life.

Description

A kind of air-bag shock absorber reset buffer means
Technical field
The utility model is related to ride-control field, especially a kind of air-bag shock absorber reset buffer means.
Background technology
With society develop, science and technology progress, China Automobile Industry is swift and violent, and the function and usage of automobile is also a variety of more Sample not only has traditional compact-type automobile, also miscellaneous refitted car, heavy truck etc..However, since mobile applications are big Different, automobile also makes a world of difference to the performance requirement of each section parts of itself, especially to suspension system and damper Vehicle performance matching require it is high.For these factors, part factory has developed air-bag shock absorber, due to the presence of air bag, The type damper is easily damaged in recovery stroke, this just needs to do damper some safeguard measures, thus proposes to increase multiple Former buffer spring pulls out to prevent piston rod, damper damage.
In traditional return spring design, because of automobile frame volumetric constraint, the volume of damper can not generally expand, General return spring is to ensure that good effectiveness in vibration suppression uses the return spring of long stroke.At this point, the recovery due to long stroke Spring only has two sections of fixations, probably due to by reasons such as the flexible offsets of lateral force or piston rod return spring is occurred for damper Deviation, this kind of deviation may make return spring scraping work cylinder inner surface or piston pole face.It is this kind of scrape so that working cylinder and It can not be sealed between piston rod, damper working effect reduces;Meanwhile the clast for scraping generation can be destroyed further in damper Portion's structure, cause gas leakage, oil leak and it is stuck situations such as;The force structure that scraping simultaneously also results in damper changes, and holds Situations such as being easily broken.If common damper spring, diameter of piston rod are 25 millimeters in the market, it is 35 to play cylinder diameter Millimeter.I.e. in this kind of damper, the line footpath of used spring is necessarily less than 5 millimeters and entire spring diameter need to be in 25-35 Between millimeter.Such size limitation leads to not select the high-strength spring that deviation can be avoided to scratch.
Piston rod assembly for damper as described in the utility model patent application No. is 201320870842.3 and Damper, vehicle with it, the piston rod assembly for damper include:Piston rod;Resetting spring, resetting spring It is arranged on the piston rod;Guider, guider are arranged on the piston rod and positioned at the top of resetting spring;Support base, support Cover for seat is set on the piston rod and positioned at the lower section of resetting spring;And two Shock-proof sleeves, two Shock-proof sleeves are set in piston rod Upper and lower ends that are upper and being connected to resetting spring, two Shock-proof sleeves only support respectively with guider and support base.According to this reality It, can be effective by setting Shock-proof sleeve between support base and resetting spring with the novel piston rod assembly for damper It prevents the upper and lower side of resetting spring from rotating asynchronous, abnormal sound occurs during so as to avoid Vehicular turn, prevents wear out failure, improves The service life of damper and the comfort of vehicle, and Shock-proof sleeve can reduce the vibration between resetting spring and support base.It should Utility model solves only the problem of resetting spring rotation, does not solve the problem of resetting spring is axially bent.
Vehicle shock absorber hydraulic cushion protection dress as described in the utility model patent application No. is 201310099014.9 It puts, piston-rod assembly is equipped in working cylinder, the installation limiting clamp spring at piston rod limiting slot, in the piston rod of piston-rod assembly It is upper that limit base, limiting buffer pad are installed and can be limited slow along piston rod and the floating piston assembly of working cylinder axially reciprocating Punching pad and the piston rod of piston-rod assembly are interference fitted, and are fixed on limit base end, guide sleeve, positioning sleeve are sleeved on piston rod It on the piston rod of assembly and is fixed on the inner cavity of working cylinder, resetting spring is mounted between floating piston assembly and positioning sleeve. The utility model is created using the above structure, and limit buffer stroke is longer, can effectively reduce damper parts in limit position It puts and is hit, improve the service life of damper.Floating piston, into row buffering, is buffered using hydraulic pressure small through hole throttle style Resistance can change with the variation of speed, and the adjustment of ultimate damping performance can be also carried out according to different whole-car parameters, is reached To the matching moved with vehicle, so as to greatly improve the comfort of seating, while the small through hole energy during shock absorbers compression Ensure being replenished in time for floating piston epicoele fluid.The utility model resetting spring one end is fixed, and does recovery stroke upon compression Shi Keneng is longer than standing length because inertia is stretched to, and is more easy to the bending for causing spring and the scraping to piston rod.
In conclusion how to produce one kind to resetting spring is made not bend, piston rod and work the inside wall of cylinder will not be scraped Hinder, work at the same time function admirable, the air-bag shock absorber reset buffer means of long lifespan are problems to be solved in the utility model.
Utility model content
Will not be bent the purpose of this utility model is to provide a kind of resetting spring, piston rod and the work inside wall of cylinder will not be by It scratches, work at the same time function admirable, the air-bag shock absorber reset buffer means of long lifespan.
To realize purpose of utility model, the utility model employs following technical solution:A kind of air-bag shock absorber resets slow Flushing device, including housing, piston assembly, positioning device, return spring, which is characterized in that the piston assembly includes piston rod, The piston rod annular groove, the piston rod are divided into path section and major diameter section, and the annular groove is set to the path section;The piston Assembly is mounted in the housing, and the major diameter section is stretched out out of described housing, and the positioning device and the piston assembly are consolidated It connects, the return spring is mounted in the positioning device, and the return spring is located on the outside of the path section.
On the one hand the major diameter section and path section play the installation positioning device, on the other hand reduce the work Stopper rod is in the diameter of the return spring construction section so that increases in the case where not increasing the hull outside size described multiple The installation space of former spring, therefore line footpath and diameter can be selected thicker, the shorter spring of length reach strong needed for damper Degree, thicker line footpath and diameter increase the lateral stiffness of the return spring in structure, make the return spring horizontal To bending, piston rod is scratched.The annular groove is used to install the positioning device.
Preferably, the positioning device includes guide, limiter and clamp spring.
The installation return spring can be consolidated by the cooperation of the guide, limiter and clamp spring.
Preferably, the guide includes first sleeve, flange and the second casing.
It is closely slidably matched with the path section on the inside of the first sleeve.The second casing inside and the major diameter section Closely it is slidably matched.
Preferably, the flange extends outwardly from first sleeve, the flange and first, second casing one into Type.
The integrally formed mode of production causes guide to be readily produced and assemble.
Preferably, the major diameter section is only supported with second casing, the clamp spring is clamped with the annular groove, the limiting Device is interference fitted with the clamp spring.
The clamp spring is fixed after being connected in the annular groove, and the limiter is described with fixed after clamp spring interference fit Ladder is only supported with second casing, can be slided between each other.Second casing and institute described in when damper does compression travel It states shell to offset, the return spring is pushed to compress.
Preferably, the return spring upper end is only supported with the flange.
Preferably, the return spring lower end is only supported with the limiter.
It is supported by the return spring and the flange and stopping for the limiter so that the return spring is protected in period Hold preload compressive state.
Preferably, the piston assembly further includes piston head, the piston head is installed on the path section end.
Piston rod cooperation piston head forms complete piston assembly, to ensure the normal work of damper.
Preferably, the housing includes guider, fuel tank and working cylinder, the guider is mounted on the fuel tank Inside top, the working cylinder are installed on the inside of the fuel tank, and described working cylinder one end connects the guider.
Preferably, the piston rod is in axial sliding connection with the guider, the piston head and the work cylinder shaft To being slidably connected.
On the one hand the guider plays installation and is oriented to the piston rod, be on the other hand used in shock absorbers compression To only second casing, for compressing the return spring.The fuel tank plays shock absorbing effect, pacifies in the working cylinder Fill the piston assembly.It is in axial sliding connection by the piston rod and the guider, the piston head and the working cylinder It is in axial sliding connection.So that movement of the piston assembly in the housing is limited by degree of freedom twice, ensure the piston Stroke straightness higher during assembly working in reciprocating mode, reduction bending and so on.
The beneficial effects of the utility model are:By effectively improving return spring rigidity, it is made not bend, piston rod It will not be scraped off with the work inside wall of cylinder.The utility model has the advantages of simple in structure, excellent working performance, long working life.
Description of the drawings
Fig. 1 is the structure diagram of the preferred embodiment of the utility model;
Fig. 2 is the structure diagram of the guide of the preferred embodiment of the utility model;
Items are respectively in figure:1 housing, 11 guiders, 12 fuel tanks, 13 working cylinders, 2 piston assemblies, 21 piston rods, 211 ladders, 212 annular grooves, 213 path sections, 214 major diameter sections, 22 piston heads, 3 positioning devices, 31 guidees, 311 first sleeves, 312 Second casing, 313 flange, 32 limiters, 33 clamp springs, 4 return springs.
Specific embodiment
The utility model is described in detail below in conjunction with attached drawing:
As shown in the structure diagram of the preferred embodiment of Fig. 1:A kind of air-bag shock absorber reset buffer means, including shell Body 1, piston assembly 2, positioning device 3, return spring 4.
Piston assembly 2 is mounted in housing 1 and is stretched out out of housing 1, positioning device 3 and piston assembly 2 in the present embodiment Affixed, return spring 4 is sleeved in Pre strained state in positioning device 3.Housing 1, piston assembly 2, positioning device 3 and return spring The general structure of 4 mutual cooperation composition air-bag shock absorber.The drift of resetting spring 4 is longer than the length of positioning device 3, So that the positioning preload by positioning device 3 acts on, return spring 4 is constantly in preload compressive state, and overall stiffness is more than pine Relaxation state is not susceptible to bend.Meanwhile the return spring 4 in Pre strained state can provide elastic force in compression work immediately Cushioning effect is carried out, improves the working performance of damper.And general freely fitted resetting spring meeting in compression work Certain compressing force and stroke are consumed first to complete preload action so that the working effect unobvious of damper.
In the present embodiment, housing 1 includes guider 11, fuel tank 12 and working cylinder 13, and guider 11 is mounted on fuel tank 12 inside tops, working cylinder 13 are installed on 12 inside of fuel tank, 13 one end of working cylinder connection guider 11.Guider 11 is on the one hand Play installation guide piston bar 21, be on the other hand used to support only the second casing 312 in shock absorbers compression, it is multiple for compressing Former spring 4.Fuel tank 12 plays shock absorbing effect, and hydraulic oil liquid can effectively absorb part vibration and active force.Work 13 Installation piston assembly 2 in cylinder.
In the present embodiment, piston assembly 2 includes piston rod 21 and piston head 22, and piston rod 21 includes annular groove 212.Piston rod 21 one end are equipped with piston head 22.21 main body of piston rod is in two-part structure, is divided into path section 213 and major diameter section 214, major diameter section 214 and path section 213 demarcated by a ladder 211, annular groove 212 is opened in the path section 213 of piston rod 21.Ladder 211 1 Aspect plays a part of to install guide 31, on the other hand reduces diameter of the piston rod 21 in 4 construction section of return spring so that not Increase the installation space of return spring 4 in the case of increasing by 1 external dimensions of housing, therefore line footpath and diameter can be selected thicker, it is long Shorter spring is spent to reach the intensity needed for damper, and thicker line footpath and diameter increase the horizontal stroke of return spring in structure To rigidity, return spring is made laterally not bend, scratch piston rod.
In the present embodiment, piston rod 21 is in axial sliding connection with guider 11, and piston head 22 slides axially with working cylinder 13 Connection.Piston rod 21 and 11 inner wall of guider are closely slidably matched, and are closely slidably matched so that piston rod 21 is in guider 11 It will not shake during slip, while play the role of a degree of parting seal working cylinder 13, make damping cushion effect more It is good.Piston head 22 and 13 inner wall of working cylinder are closely slidably matched, and are closely slidably matched so that piston head 22 is sliding in working cylinder 13 It will not shake when dynamic, while play the role of a degree of 13 upper and lower cavity of parting seal working cylinder, make vibration reduction and cushioning Effect is more preferable.It is in axial sliding connection simultaneously by piston rod 21 and guider 11, piston head 22 and 13 company of sliding axially of working cylinder It connects.So that the movement of piston assembly 2 within the case 1 is limited by degree of freedom twice, ensure that stroke is straight during 2 working in reciprocating mode of piston assembly Dimension higher is reduced and is shaken, bending and so on.
In the present embodiment, positioning device 3 includes guide 31, limiter 32 and clamp spring 33.Pass through guide 31,32 and of limiter Clamp spring 33 forms the positioning device 3 of both ends limiting, can consolidate installation return spring 4.Guide 31 rises work in damper simultaneously When guiding role.
As shown in the structure diagram of the guide of the preferred embodiment of the utility model of Fig. 2:Guide 31 includes first Casing 311,313 and second casing 312 of flange.311 inside of first sleeve and path section 213 are closely slidably matched.Second casing 312 insides and ladder major diameter section 214 are closely slidably matched.It is closely slided by 311 inside of first sleeve and ladder path section 213 Cooperation;Second casing, 312 inside and ladder major diameter section 214 are closely slidably matched so that movement of the guide 31 on piston rod 21 Always be restricted to the degree of freedom in only contour direction, ensure that guide 31 will not opposing pistons bar 21 shake, so as to Return spring 4 is eliminated to shake with guide 31 and bend the risk for scratching piston rod 21 or working cylinder 13.
In the present embodiment, flange 313 extends outwardly from first sleeve 311,313 and first, second casing of flange, 312 one Molding.The integrally formed mode of production causes guide 31 to be readily produced and assemble.
In the present embodiment, ladder 211 is only supported with the second casing 312, and clamp spring 33 is clamped with annular groove 212,32 bottom of limiter Equipped with circular trough, which is interference fitted with clamp spring 33.4 upper end of return spring is only supported with flange 313,4 upper end of return spring Coordinate with first sleeve 311 and install.4 lower end of return spring is only supported with limiter 32.Clamp spring 33 is fixed after being connected in annular groove 212, Limiter 32 is fixed after being interference fitted with clamp spring 33, and the fixation of limiter 32 causes 4 one end of return spring is in be permanently fixed shape State, return spring 4 occur compression by this fixing end and reply, and the possible non-directional pressure of the free spring in both ends will not occur Contracting and the situation replied improve the working performance of damper.
When shock absorbers compression works, piston rod 21 is moved upwards with respect to housing 1, when moving to the second casing 312 and be oriented to When device 11 contacts, guider 11 supports the second casing 312 only.At this point, guide 31 can be considered stationary state, and piston assembly 2 is still It moving upwards, flange 313 stops moving upwards for return spring 4, and then limiter 32 pushes return spring 4 further to compress, Play cushioning effect.At this point, the second casing 312 leaves major diameter section 214, guide 31 is matched by first sleeve 311 and path section 213 It closes and ensures not generating shaking between piston rod 21.
The elastic potential energy of return spring 4 is more than the kinetic energy that vehicle gives damper after the completion of compression work stroke, restores Spring 4 starts rebound and does recovery stroke.Return spring 4 pushes down on limiter 11 at this time, and piston assembly 2 is driven to return to initially Position.The matching relationship of limiter 32 and return spring 4 causes limiter 32 to drive return spring 4 whole with piston assembly simultaneously 2 move downward.When moving downward more than 3 length of positioning device, ladder 211 supports only with the second casing 312 again, the second casing 312 restore nested with major diameter section 214, and return spring 4 returns back to Pre strained state.Guide 31 leaves guider 11 with piston assembly 2 Initial position is returned back to, completes reset response.
Above example is only described the preferred embodiment of the utility model, not to the structure of the utility model Think and range is defined, without departing from the design concept of the present utility model, ordinary people in the field is new to this practicality The all variations and modifications that the technical solution of type is made each fall within the scope of protection of the utility model, the utility model request The technology contents of protection have all been recorded in detail in the claims.

Claims (10)

1. a kind of air-bag shock absorber reset buffer means, including housing(1), piston assembly(2), positioning device(3), return spring (4), which is characterized in that the piston assembly(2)Including piston rod(21), the piston rod(21)Annular groove(212), the piston Bar(21)It is divided into path section(213)With major diameter section(214), the annular groove(212)It is set to the path section(213);The work Fill in assembly(2)Mounted on the housing(1)It is interior, the major diameter section(214)From the housing(1)Interior stretching, the positioning device (3)With the piston assembly(2)It is affixed, the return spring(4)Mounted on the positioning device(3)It is interior, the return spring (4)Positioned at the path section(213)Outside.
A kind of 2. air-bag shock absorber reset buffer means according to claim 1, which is characterized in that the positioning device (3)Including guide(31), limiter(32)And clamp spring(33).
A kind of 3. air-bag shock absorber reset buffer means according to claim 2, which is characterized in that the guide(31)Packet Include first sleeve(311), flange(313)With the second casing(312).
A kind of 4. air-bag shock absorber reset buffer means according to claim 3, which is characterized in that the flange(313) From first sleeve(311)Extend outwardly, the flange(313)With first, second casing(312)It is integrally formed.
A kind of 5. air-bag shock absorber reset buffer means according to claim 3 or 4, which is characterized in that the major diameter section (214)With second casing(312)It only supports, the clamp spring(33)With the annular groove(212)Clamping, the limiter(32)With The clamp spring(33)Interference fit.
A kind of 6. air-bag shock absorber reset buffer means according to claim 5, which is characterized in that the return spring (4)Upper end and the flange(313)Only support.
A kind of 7. air-bag shock absorber reset buffer means according to claim 6, which is characterized in that the return spring (4)Lower end and the limiter(32)Only support.
A kind of 8. air-bag shock absorber reset buffer means according to claim 1, which is characterized in that the piston assembly (2)Further include piston head(22), the piston head(22)It is installed on the path section(213)End.
A kind of 9. air-bag shock absorber reset buffer means according to claim 8, which is characterized in that the housing(1)Packet Include guider(11), fuel tank(12)And working cylinder(13), the guider(11)Mounted on the fuel tank(12)Medial roof Portion, the working cylinder(13)It is installed on the fuel tank(12)Inside, the working cylinder(13)One end connects the guider (11).
A kind of 10. air-bag shock absorber reset buffer means according to claim 9, which is characterized in that the piston rod (21)With the guider(11)It is in axial sliding connection, the piston head(22)With the working cylinder(13)It is in axial sliding connection.
CN201721256944.0U 2017-09-28 2017-09-28 A kind of air-bag shock absorber reset buffer means Active CN207500382U (en)

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CN201721256944.0U CN207500382U (en) 2017-09-28 2017-09-28 A kind of air-bag shock absorber reset buffer means

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111473082A (en) * 2020-05-14 2020-07-31 长安大学 Memory metal air spring particle damper

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111473082A (en) * 2020-05-14 2020-07-31 长安大学 Memory metal air spring particle damper

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