CN102032313B

CN102032313B - Damping device

Info

Publication number: CN102032313B
Application number: CN201010607745A
Authority: CN
Inventors: 陈仁华; 廖建国; 胡小平; 刘远兰; 王琼
Original assignee: SICHUAN CHUANNAN VIBRATION REDUCER GROUP CO Ltd
Current assignee: SICHUAN CHUANNAN VIBRATION REDUCER GROUP CO Ltd
Priority date: 2010-12-27
Filing date: 2010-12-27
Publication date: 2012-08-29
Anticipated expiration: 2030-12-27
Also published as: CN102032313A

Abstract

The invention discloses a damping device which comprises a damper, wherein the damper comprises a shell with an inner cavity, and a piston, the outer end of a piston connecting rod of the piston extends out of one end of the shell, the outer end of the piston connecting rod and the other end of the shell are respectively provided with a first spring seat and a second spring seat, a damping spring is arranged between the first spring seat and the second spring seat, a cylindrical spacer bush is arranged between the inner circumferential side of the damping spring and the outer circumferential side of the piston connecting rod, and the first end of the spacer bush is fixed with the first spring seat. In the damping device disclosed by the invention, the spacer bush can block partial flying dust, stone and other outside foreign matters, and reduce the contact of the piston connecting rod with the dust or hard matters, thereby reducing adverse effects of the dust or hard matters to the matching of the piston connecting rod and the shell, being capable of decreasing the phenomenon of blocking a piston damping hole by the dust entering the inner cavity of the shell, ensuring the safe use of the damping device and prolonging the service life of the damping device.

Description

A kind of damping device

Technical field

The present invention relates to the traffic safety manufacturing field of equipment, more particularly, relate to a kind of damping device.

Background technique

Along with the progress in epoch, the raising of quality of life, Motor Vehicle such as car, motorcycle have been the very general traffic tool all; Comfortable for what drive and take, damping device is widely used on the Motor Vehicle.

Please refer to Fig. 1, Fig. 1 is the structural representation of a kind of damping device commonly used in the existing technology.

This damping device comprises damper 11, and damper 11 comprises housing 111 with inner chamber and the piston 112 that cooperates with housing 111 inner chambers, and an end of housing 111 is stretched out in the outer end of the piston rod 12 of piston 112; Housing 111 inner chambers are divided into epicoele to piston 112 and the cavity of resorption epicoele is a rodless cavity, and cavity of resorption is a rod chamber; Epicoele and cavity of resorption have damping oil 13; The piston body of piston 112 has the damping hole that is communicated with epicoele and cavity of resorption.The other end of the outer end of piston rod 12 and housing 111 is respectively arranged with between first spring seat 15 and second spring seat, 14, the first spring seats 15 and second spring seat 14 and is provided with damping spring 16.

When damping device received external impacts, piston 112 moved in the inner chamber of housing 111, and damping oil 13 flows between epicoele and cavity of resorption through the damping hole of piston 112, produces predetermined damping force, and then the buffering external impacts; Simultaneously, damping spring 16 is compressed, and also can cushion the external impacts of a part.After the external impacts, piston rod 12 is returned to original state together with piston 112 under the elastic force effect of damping spring 16.

Piston rod 12 stretches out in the exposed parts of housing 111, and except the damping spring 16 that has outer circumferential side to be provided with was protected, this exposed parts was exposed fully outside, not any other protection setting.Vehicle is in the process of going, and the dust that flies up can be easy on the periphery wall attached to piston rod 12; In piston rod 12 pumps process; Part dust very easily is brought in the housing 111 of damper 11, not only pollute damping oil, and contaminated damping oil also can stop up the damping hole of piston 112; The damping effect of this damping device is reduced, even can't play damping effect; More dust but is blocked in the place that is connected of piston rod 12 and housing 111; Frictional force between piston rod 12 and the housing 111 is increased; Not only influence damping effect; Both rates of wear are increased, influence the quality of fit of piston rod 12 and housing 111, possibly cause damping oil 13 to leak when serious; Piston rod 12 also can produce noise when wearing and tearing each other with housing 111, influences driver's normal driving.

In addition, in the process of moving, since the diversity on road surface, hard thing such as some little stones that splashed sometimes; The speed that this type of hard thing splashes is very big; If strike on the piston rod 12, can cause damage to piston rod 12 exposed parts surfaces, not only can destroy the matching relationship between piston rod 12 and the housing; Also can reduce the intensity of piston rod, the Security that influence is driven.

In a word, extraneous foreign matter such as dust, hard thing travelling comfort that the influence of damping device has been reduced current vehicle driving and taken.How to reduce the adverse effect of extraneous foreign matter, and then the driving and the riding comfort of raising Motor Vehicle are the problems that those skilled in the art need solve to damping device.

Summary of the invention

Core of the present invention provides a kind of damping device, and this damping device can reduce the adverse effect of extraneous foreign matter to damping device, and then improves the driving of Motor Vehicle and the travelling comfort of taking.

For realizing above-mentioned purpose; The invention discloses a kind of damping device; This damping device comprises damper, and said damper comprises housing with inner chamber and the piston that cooperates with the housing inner chamber, and an end of said housing is stretched out in the outer end of the piston rod of said piston; And the outer end of said piston rod and the other end of said housing are respectively arranged with first spring seat and second spring seat; Be provided with damping spring between said first spring seat and second spring seat, be provided with the spacer of tubular between interior all sides of said damping spring and the said piston rod outer circumferential side, said spacer first end and said first spring seat are fixed.

Preferably, said spacer is processed by resin material.

Preferably, also comprise the sealed member of tubular, said sealed member first end links to each other with second end of said spacer, and said sealed member second end and said housing outer circumferential face fit.

Preferably, said sealed member internal surface has the inner card cage of ring-type, and the said spacer second end outer surface has the outer snap ring that matches with this inner card cage.

Preferably, said sealed member internal surface has the interior snap ring of ring-type, and the said spacer second end outer surface has and is somebody's turn to do the exterior bayonet slot that interior snap ring matches.

Preferably, the longitudinal cross-section of the said sealed member second distolateral wall forms intilted wedge-shaped structure, and the top of said wedge-shaped structure and housing outer circumferential face fit.

Preferably, said piston is divided into epicoele and cavity of resorption with said housing inner chamber, and said piston is provided with first damping hole that is communicated with said epicoele and cavity of resorption; Said housing also forms the air shock absorption chamber that is positioned at said epicoele top, is communicated with through second damping hole between said air shock absorption chamber and the said epicoele, and at least a portion space, said air shock absorption chamber has gas, has damping oil in said epicoele and the cavity of resorption.

Preferably, said housing is a tubular structure, has the buffering valve plate between said air shock absorption chamber and the said epicoele, and said second damping hole is set on the said buffering valve plate.

Preferably, also comprise guide element, said guide element periphery wall is fixedly installed in the inner chamber of said housing, and said guide element center is provided with the through hole that the piston rod with said piston is slidingly matched.

Preferably, said damper lower end is connected with lower connecting base, and said lower connecting base is connected with car body through roller bearing.

With respect to background technique, in the damping device provided by the invention, between interior all sides of damping spring and piston rod outer circumferential side, be provided with the spacer of tubular, this spacer first end and first spring seat are fixed.Like this, spacer just can cover the part that piston rod exposes to housing; In the vehicle driving process, extraneous foreign matter such as the dust that spacer can stop portions have splashed or stone; Reduce the dust that gets in the housing, keep the damping oil turbidity test, reduce and pollute the situation that damping oil stops up the damping hole of piston, improve the damping effect and the damping reliability of damping device; Minimizing keeps the quality of fit between piston rod and the housing attached to the amount of dust of piston rod and shell joint, guarantees the safe handling property of damping device, prolongs the working life of damping device; So just can reduce the adverse effect of extraneous foreign matter, and then improve the driving of Motor Vehicle and the travelling comfort of taking damping device.

Description of drawings

Fig. 1 is the structural representation of a kind of damping device commonly used in the existing technology;

The structural representation of the damping device that Fig. 2 provides for the embodiment of the invention one;

Fig. 3 is the partial enlarged drawing of I-I part among Fig. 2;

The structural representation of the damping device that Fig. 4 provides for the embodiment of the invention two;

The structural representation of the damping device that Fig. 5 provides for the embodiment of the invention three.

Embodiment

The invention discloses a kind of damping device, in this damping device, between interior all sides of damping spring and piston rod outer circumferential side, be provided with the spacer of tubular, this spacer first end and first spring seat are fixed; So just can reduce the adverse effect of extraneous foreign matter, improve the safe application performance of damping device damping device.

For the technician who makes the present technique field understands technological scheme of the present invention better, will combine accompanying drawing and specific embodiment that technological scheme provided by the invention is done further to specify below.Technological scheme provided by the invention is the basis with the existing technology, therefore, continues to use the reference character in the background technique with the bottom.

Please refer to Fig. 2, the structural representation of the damping device that Fig. 2 provides for the embodiment of the invention one.

Damping device provided by the invention comprises damper 11, and damper 11 comprises housing 111 with inner chamber and the piston 112 that cooperates with housing 111 inner chambers; Piston 112 is divided into epicoele 114 and cavity of resorption 113 with the inner chamber of housing 111, and piston 112 is provided with first damping hole 1121 that is communicated with epicoele 114 and cavity of resorption 113.

An end of housing 111 is stretched out in the outer end of the piston rod 12 of piston 112; The other end of the outer end of piston rod 12 and housing 111 is respectively arranged with between first spring seat 15 and second spring seat, 14, the first spring seats 15 and second spring seat 14 and is provided with damping spring 16; Be provided with the spacer 17 of tubular between interior all sides of damping spring 16 and piston rod 12 outer circumferential sides, spacer 17 first ends and first spring seat 15 are fixing, and second end upwards stretches out, to cover the exposed parts of piston rod 12; Because the length of the exposed parts of piston rod 12 constantly changes, spacer 17 has predetermined length, and its length should satisfy the situation of the exposed parts that covers piston rod 12 when the longest.

In the damping device provided by the invention, between interior all sides of damping spring 16 and piston rod 12 outer circumferential sides, be provided with the spacer 17 of tubular, spacer 17 first ends and first spring seat 15 are fixing.Like this, spacer 17 just can cover the part that piston rod 12 exposes to housing 111; In the vehicle driving process, extraneous foreign matter isolating such as the dust that spacer 17 can stop portions have splashed or stone; Reduce the dust that gets in the housing 111, keep damping oil 13 turbidity test, reduce and pollute the situation that damping oil stops up first damping hole 1121 of piston 12, improve the damping effect and the damping reliability of damping device; The amount of dust that minimizing is connected and locates attached to piston rod 12 and housing 111, and then keep the quality of fit between piston rod 12 and the housing 111, guarantee the safe handling property of damping device, prolong the working life of damping device; So just can reduce the adverse effect of extraneous foreign matter, and then improve the driving of Motor Vehicle and the travelling comfort of taking damping device.

The material of spacer 17 can adopt resin material, and resin material can have certain typing effect, to guarantee protection effect.Also can adopt rubber material, and preferred soft rubber material, to satisfy in piston rod 12 to-and-fro motion compression of self and extension.

This damping device further comprises the sealed member 18 of tubular, and first end of sealed member 18 links to each other with second end of spacer 17, and second end of sealed member 18 and the outer circumferential face of housing 111 fit.The setting of sealed member 18 can increase the inner sealing performance of spacer 17, prevents that more effectively the especially tiny dust of dust from getting into spacer 17 inside, avoids the adverse effect of dust to damping device better.

Please refer to Fig. 3, Fig. 3 is the partial enlarged drawing of I-I part among Fig. 2.Sealed member 18 internal surfaces further are provided with the inner card cage 181 of ring-type, and spacer 17 second end outer surfaces are provided with the outer snap ring 171 that matches with inner card cage 181; Certainly, sealed member 18 internal surface relevant positions can also be provided with interior snap ring, and the setting of spacer outer surface and interior snap ring are wanted the exterior bayonet slot that cooperates, and effect is identical with above-mentioned effect.Adopt this kind design that sealed member 18 is cooperated simply with spacer 17, sealing effect is good, and manufacture process is simple and easy, convenience, low cost of manufacture.Many snap ring and draw-in grooves to matching also can be set, to improve the reliability that sealed member 18 is connected with spacer 17.Said structure can be connected with assembling between the spacer 17 for sealed member 18.Also can adopt other modes that one end of sealed member 18 is linked to each other with second end of spacer, such as: through bonding, be threaded or interference fit connects, or the like

In order to guarantee the sealability of sealed member 18 and housing 111 cooperation places, sealed member 18 can be slided with respect to housing more smoothly, sealed member 18 can be set to corresponding structure.Please refer to Fig. 3.In the present embodiment, the longitudinal cross-section of the second distolateral wall of sealed member 18 further is designed to intilted wedge-shaped structure, and the outer circumferential face of the top of wedge-shaped structure and housing 111 fits.Said vertically consistent with the axial direction of housing 111.The design of wedge-shaped structure makes second end of sealed member 18 and the outer circumferential face of housing 111 fit tightr.This wedge-shaped structure is more conducive to foreign matters such as dust, rainwater on the one hand along the downward landing of sphenoid surface, is not easy to accumulate foreign matter, protects spacer 17 inside not invaded by foreign matter more effectively, and then protection piston rod 12 is not damaged.On the other hand, can also keep the applying with the housing outer circumferential face, guarantee that spacer 17 is not invaded by extraneous foreign matter in movement process.Certainly, also can sealed member 18 be set to other concrete structures with housing 111 fitting surfaces, such as, can be set to transition fit between second end of sealed member 18 and the housing, the perhaps contractile material sealed member 18 of apparatus, or the like.

In order to improve the damping effect of damping device, the embodiment of the invention two also provides another kind of damping device.

Please refer to Fig. 4, the structural representation of the damping device that Fig. 4 provides for the embodiment of the invention two.

Identical with embodiment one, piston 112 is divided into epicoele 114 and cavity of resorption 113 with the inner chamber of housing 111, and piston 112 is provided with first damping hole 1121 that is communicated with epicoele 114 and cavity of resorption 113.Embodiment two difference is; Housing 111 also is formed with the air shock absorption chamber 115 that is positioned at epicoele 114 tops; Have second damping hole 116 between air shock absorption chamber 115 and the epicoele 114,115 at least a portion spaces, air shock absorption chamber have gas, and epicoele 114 has damping oil 13 with cavity of resorption 113.

When damping device received less external impacts, because epicoele 114 is opposite with cavity of resorption 113 variation in pressure, damping oil 13 was main mobile through first damping hole 1121, and damping oil exchanges between epicoele 114 and cavity of resorption 113; When damping oil 13 passed through first damping hole 1121, first damping hole 1121 can produce the impact of enough damping force buffering external force.

When damping device receives bigger external impacts; First damping hole 1121 of piston 112 is because the passage section that is subject to; Damping oil 13 flow restricted; Limited through the flow of first damping hole 1121 at short notice, piston 112 amount of movements also are restricted, and therefore enough damping forces can't be provided; At this moment, because the pressure of damping oil 13 is bigger in the epicoele 114, has part damping oil 13 and get into air shock absorption chamber 115 through second damping hole 116; In air shock absorption chamber 115, damping oil 13 can push gas, makes air shock absorption chamber 115 contraction of gas.Damping oil 13 all can produce cushion effect with the buffering external impacts through the process of second damping hole 115 and extruding gas; After the external impacts, be extruded to the damping oil 13 in air shock absorption chamber 115 through second damping hole 116, because the gas pressure effect, damping oil 13 can flow back into original state again, so that the secondary pulse of buffering external force.

In said process; Damping device provided by the invention is owing to be provided with second damping hole 116; The damping oil 13 of epicoele 114 can be made progress and two-way flow downwards, all can produce required damping force during through first damping hole 1121 and second damping hole 116 with the buffering external impacts.Therefore, no matter receive less still bigger external impacts, the effect that this damping device can both satisfy bumper and absorbing shock makes vehicle body more steady in the process of moving.In addition, because gas has certain compressibility in the air shock absorption chamber 115, in the process of being compressed, gas also can provide the partial buffer active force.

Please refer to Fig. 5, the structural representation of the damping device that Fig. 5 provides for the embodiment of the invention three.

In this damping device, be provided with buffering valve plate 117 between air shock absorption chamber 115 and the epicoele 114, air shock absorption chamber 115 is the part of housing 111 inner chambers, and second damping hole 116 is arranged on the buffering valve plate 14; Buffering valve plate 117 is fixedly connected on the inwall of housing 111, and the fixed connection mode is preferably riveted, and can also adopt welding certainly, and Placement such as be threaded is fixed.The periphery and the tight contact matching of housing 111 inwalls of buffering valve plate 117 prevent that damping oil 13 from being passed through by the sidewall space, and the phenomenon that weakens damping force takes place.

For buffering valve plate 117 peripheries are closely contacted with housing 111 inwalls, can also add sealed members such as seal washer by between, to guarantee sealing.In addition, buffering valve plate 117 can be arranged on the end of piston 112 ranges, and the range that can also be slightly higher than piston 112 certainly is terminal.This position neither influences the motion of below piston 112, also can satisfy the needs in air shock absorption chamber 114, top and 13 pairs of spaces of damping oil.Adopt buffering valve plate 14 structures, can reduce structural change as far as possible, make production process simple, convenient damper 11; Simultaneously, the fitting operation of buffering valve plate 14 is simple, like this, has reduced whole cost of production.

Because there are special circumstances such as some deceleration strips in the road surface situation of vehicle driving or road surface; The directivity of external impacts is uncertain, and in the bumper and absorbing shock process, piston rod 12 promotes piston 112 and in the inner chamber of housing 111, moves reciprocatingly; Piston rod 12 suffered external force directions can not guarantee it is along its axial direction; So piston rod 12 can produce pressure to the sidewall of the cooperation place of housing 111 in movement process; Increase friction between the two, piston rod 12 is caused certain damage.

Damping device provided by the invention further adds guide element 19.Guide element 19 is positioned at piston 112 belows, and the periphery wall of guide element 19 is fixedly installed on the inwall of housing 111, and the fixed installation mode is preferably riveted, and can also or be threaded or the like for welding; Guide element 19 centers are provided with through hole, and are socketed on the piston rod 12, and through hole slidably cooperates with piston rod 12.

It is the external force beyond piston rod 12 axial directions that guide element 19 bears direction, can make piston rod 12 will reduce the friction between piston rod 12 and the housing 111 along moving on its axial direction better.

Damping device provided by the invention further is provided with roller bearing 22 in lower connecting base 21, is connected with car body through roller bearing 22.Guarantee in the vehicle driving reversing flexibly of lower connecting base 21 in the damping device to-and-fro motion; The axial direction along piston rod 12 that lower connecting base 21 is tried one's best to the direction of the power of piston rod 12 transmission further prevents owing to phenomenons such as wearing and tearing appear in the stressed piston rod that causes 12 of the sidewall of housing 111.

In addition, adopt the rubber dust-proof sealing structure, prevent that foreign matters such as extraneous dust, stone get in the twist motion, the working life of having improved roller bearing 22 at roller bearing 22 two ends.

Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed all is and other embodiments' difference that identical similar part is mutually referring to getting final product between each embodiment.

To the above-mentioned explanation of the disclosed embodiments, make related domain professional and technical personnel can realize or use the present invention.Multiple modification to these embodiments will be conspicuous concerning those skilled in the art.Therefore, the present invention will can not be restricted to these embodiments shown in this paper, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.

Claims

1. damping device; Comprise damper; Said damper comprises housing with inner chamber and the piston that cooperates with the housing inner chamber, and an end of said housing is stretched out in the outer end of the piston rod of said piston, and the other end of the outer end of said piston rod and said housing is respectively arranged with first spring seat and second spring seat; Be provided with damping spring between said first spring seat and second spring seat; It is characterized in that be provided with the spacer of tubular between interior all sides of said damping spring and the said piston rod outer circumferential side, said spacer first end and said first spring seat are fixed;

Said piston is divided into epicoele and cavity of resorption with said housing inner chamber, and said piston is provided with first damping hole that is communicated with said epicoele and cavity of resorption; Said housing also forms the air shock absorption chamber that is positioned at said epicoele top, is communicated with through second damping hole between said air shock absorption chamber and the said epicoele, and at least a portion space, said air shock absorption chamber has gas, has damping oil in said epicoele and the cavity of resorption.

2. damping device according to claim 1 is characterized in that said spacer is processed by resin material.

3. damping device according to claim 1 is characterized in that, also comprises the sealed member of tubular, and said sealed member first end links to each other with second end of said spacer, and said sealed member second end and said housing outer circumferential face fit.

4. damping device according to claim 3 is characterized in that said sealed member internal surface has the inner card cage of ring-type, and the said spacer second end outer surface has the outer snap ring that matches with this inner card cage.

5. damping device according to claim 4 is characterized in that, said sealed member internal surface has the interior snap ring of ring-type, and the said spacer second end outer surface has and is somebody's turn to do the exterior bayonet slot that interior snap ring matches.

6. damping device according to claim 5 is characterized in that, the longitudinal cross-section of the said sealed member second distolateral wall forms intilted wedge-shaped structure, and the top of said wedge-shaped structure and housing outer circumferential face fit.

7. damping device according to claim 1 is characterized in that, said housing is a tubular structure, has the buffering valve plate between said air shock absorption chamber and the said epicoele, and said second damping hole is set on the said buffering valve plate.

8. according to each described damping device of claim 1-6; It is characterized in that; Also comprise guide element, said guide element periphery wall is fixedly installed in the inner chamber of said housing, and said guide element center is provided with the through hole that the piston rod with said piston is slidingly matched.

9. according to each described damping device of claim 1-6, it is characterized in that said damper lower end is connected with lower connecting base, said lower connecting base is connected with car body through roller bearing.