CN202040257U

CN202040257U - Damping-variable vibration damper

Info

Publication number: CN202040257U
Application number: CN2010206164055U
Authority: CN
Inventors: 徐中明; 李仕生; 贺岩松; 张志飞
Original assignee: Chongqing University
Current assignee: Chongqing University
Priority date: 2010-11-19
Filing date: 2010-11-19
Publication date: 2011-11-16
Anticipated expiration: 2020-11-19

Abstract

The utility model discloses a damping-variable vibration damper, wherein the tube wall of a work cylinder of an ordinary double-drum hydraulic vibration damper of a conventional passive suspension is drilled with a required number of holes at required positions with required sizes and the holes are separated from the environment outside the work cylinder. The damping force of the recovery stroke and the compression stroke can be changed by changing the passage area of the vibration damper that oil flows through under different working conditions. The results of the bench scale test and the road test show that the vibration damper is good in performance and stable in damping characteristics. Based on the condition of the processed holes, the vibration damper can generate 2-5 stage damping force. Meanwhile, once the vibration damper has been designed, a proper damping force is automatically provided according to the vibration amplitude of a vehicle body without an extra damping adjustment mechanism and a control mechanism. cThe vibration damper is simple in structure, easy in manufacturing, low in cost and high in practical value, which can be applied to the vibration isolation and damping for the semi-active suspension system, the driver seat and the cab of various vehicles.

Description

Variable-damping shock

Technical field

The utility model belongs to a kind of vehicle vibration damper, particularly a kind of vibration damper of adaptive damping.

Background technique

Vibration damper is an important spare part on the automobile, and the quality of its performance directly has influence on travelling comfort, control stability and the Security of automobile.Present homemade various cars, the car that comprises the various models that imported technology or Sino-foreign joint venture are produced, as Santana, Audi, Citroen zx, Buick etc. all is the vibration damper that adopts traditional immutable damping basically, thereby is difficult to adapt to different roads and behaviour in service.The domestic patent application that has about variable (or adjustable) damping shock absorber that can adapt to different roads and behaviour in service, as application number is 91201256.0 to have announced a kind of adaptive transmission control, but this patent is loaded on stepper motor in the dust-proof cover, make this place need installing space bigger, stepper motor places vibration environment for a long time, its life-span is short, and adopts the hollow type piston rod, and its manufacturing is relatively more difficult, mechanical strength is low.And for example application number is 99217931.9 to have announced three grades of adaptive transmission controls of a kind of internal solenoid valve formula, this patent is horizontally placed on the piston middle part with solenoid valve, make that this place's installing space is bigger, adopt the hollow type piston rod, its manufacturing is relatively more difficult, mechanical strength is low, its piston structure more complicated of while, manufacture cost is than higher.Be 200510060298.6 magnetorheological intelligent vibration damper for minisize automobile of announcing also just like application number, it need control the viscosity of vibration damping fluid by the size of current that changes hot-wire coil, thereby make resistance of shock absorber variable, but magnetic rheological liquid easily precipitates, and original the action of a magnetic field can not eliminated immediately behind outage or the change electric current, and problems such as the response time of this vibration damper is long in addition, cost costliness are not also solved well.In a word, from the structure and the working principle of above-mentioned three kinds of variable (or adjustable) damping shock absorbers, they all need be equipped with damper regulation mechanism and control mechanism, and simultaneously its complex structure, cost height, manufacture difficulty are big.So domestic variable (or adjustable) damping shock absorber that also is not successfully applied on the real vehicle, therefore, develop that cost performance is higher relatively, the variable-damping shock of the semi-active suspension that is applicable to general-utility car, have crucial meaning advancing China's semi-active suspension development of technology and real vehicle application facet.

The model utility content

The purpose of this utility model provides a kind of the need and is equipped with damper regulation mechanism and control mechanism in addition, and manufacturing simple in structure, with low cost, easy also can change the variable-damping shock of damping force automatically according to each road conditions.

The variable-damping shock that the utility model is related, it comprises bottom valve assembly 1, oil storage cylinder assembly 2, piston assembly 3, clutch release slave cylinder assembly 4, piston rod 5, guide holder assembly 6, oil sealing 7.It is characterized in that: clutch release slave cylinder assembly 4 is arranged in the oil storage cylinder assembly 2, clutch release slave cylinder assembly 4 is by seal ring 8, outer tube 9 and clutch release slave cylinder 10 are formed, the tube wall of clutch release slave cylinder 10 is drilled with size along generatrix direction and is Φ 1.0～3.0mm, pitch-row is 1～4 pair of circular hole of 25～60mm, each is uniform along the clutch release slave cylinder diametric(al) to circular hole, and its equilibrium position is the residing equilibrium position of piston of vibration damper under the load rating of vehicle.Bottom valve assembly 1 is equipped with in the bottom of clutch release slave cylinder assembly 4, guide holder assembly 6 is equipped with in the upper end of clutch release slave cylinder assembly 4, and the upper end of guide holder assembly 6 is useful on the oil sealing 7 of sealing, and the lower end of piston rod 5 places in the clutch release slave cylinder assembly 4, its upper end places outside the vibration damper, links to each other with vehicle frame.Piston assembly 3 is loaded on the lower end of piston rod 5.

Technique effect of the present utility model is:

1) this architecture is simple, cost is low, only needs the clutch release slave cylinder tube wall boring at existing common vibration damper, and the hole separated with the environment outside the clutch release slave cylinder gets final product.

2) do not need to increase damper regulation mechanism and control mechanism in addition, in case after designing the equilibrium position in hole, this vibration damper can provide required damping force voluntarily according to the Oscillation Amplitude of vehicle body;

3) for the short vibration damper of stroke, on clutch release slave cylinder, can bore pair of holes, make vibration damper that " soft ", " firmly " two kinds of different damping values can be provided, when the stroke of vibration damper is long, can bore on its clutch release slave cylinder more than two pairs or two pairs and the different hole of distance, equilibrium position, thus make vibration damper can provide " soft ", " in ", " firmly " damping force more than three kinds or three kinds.

Description of drawings

Fig. 1 is the schematic representation according to an embodiment of the present utility model;

Fig. 2 is the clutch release slave cylinder assembly schematic representation after the boring;

Fig. 3 is the local enlarged diagram of E part among Fig. 2;

Fig. 4 is the clutch release slave cylinder schematic representation of 1 pair of circular hole;

Fig. 5 is the clutch release slave cylinder schematic representation of 2 pairs of circular holes;

Fig. 6 is the clutch release slave cylinder schematic representation of 3 pairs of circular holes;

Fig. 7 is the clutch release slave cylinder schematic representation of 4 pairs of circular holes.

1-bottom valve assembly 2-oil storage cylinder assembly 3-piston assembly 4-clutch release slave cylinder assembly 5-piston rod 6-guide holder assembly 7-oil sealing 8-seal ring 9-outer tube 10-clutch release slave cylinder.

Embodiment

Below in conjunction with accompanying drawing and instantiation the utility model is further specified.

The related variable-damping shock of the utility model is by changing the useful area of the restriction that vibration damper fluid flows through, thereby reaches the purpose of the damping force that changes vibration damper.This kind variable-damping shock is as shown in Figure 1 on the basis of existing bitubular dydraulic shock absorber, bore 1～4 pair of circular hole that centre distance does not wait at the clutch release slave cylinder tube wall along its generatrix direction, the equilibrium position in hole is the residing equilibrium position of piston of vibration damper under the load rating of vehicle.As shown in Figures 2 and 3, the hole size that is bored on the clutch release slave cylinder is Φ 1.0～3.0mm, hole centre distance is 25～60mm, and the environment outside hole and the clutch release slave cylinder is separated, and the concrete size in the hole on its clutch release slave cylinder, hole centre distance and quantity should be decided according to the vehicle of used vibration damper.As shown in Figure 4, be designed to 1 pair or when being a kind of length more than 1 pair and pitch-row, if piston amplitude is smaller, when only moving, piston upper and lower cavity fluid can also flow when the quantity in hole between two holes except flowing by piston valve system between two holes on the clutch release slave cylinder; If piston amplitude is bigger, when it vibrates outside two holes, piston upper and lower cavity fluid can only flow by piston valve system, because effective throttle orifice that fluid flows reduces, under identical velocity of piston, damping force when the damping force when piston moves between two holes is moved outside two holes than piston is little, so this variable-damping shock can provide " soft ", " firmly " two kinds of damping forces.In like manner, as shown in Figure 5, when the quantity in hole is 2 pairs or when being 2 kinds of length more than 2 pairs and pitch-row, this variable-damping shock can provide " soft ", " in ", " firmly " three kinds of damping forces; As shown in Figure 6, when the quantity in hole be 3 pairs or when being 3 kinds of length more than 3 pairs and pitch-row, this variable-damping shock can provide 4 kinds of damping forces; As shown in Figure 7, when the quantity in hole is 4 pairs and pitch-row when being 4 kinds of length, this variable vibration damper can 5 kinds of damping forces.

Its working procedure is as follows:

When car when good road traveling or travelling speed are slow, it is less that the vibration of vehicle body is passed on the road surface, obtain good comfort, suspension should be softer, the damping force of the needed vibration damper of vehicle suspension this moment should be little, so just in time in porose section one section many work of work or hole of clutch release slave cylinder, vibration damper provides little damping force to piston at this moment, can obtain travelling comfort preferably like this.When automobile on abominable road surface or high-speed straight-line when travelling, the vibration that vehicle body is passed on the road surface is bigger, the automobile amplitude ratio is bigger, obtain good control stability, suspension should be more firmly, and piston makes vibration damper that bigger Resistance Value can be provided just in one section few work of imperforate section work or hole at this moment, so just can decay the rapidly vibration of automobile improves the stability of automobile turning stability, arrow path mobility or slope reversing.

As shown in Figure 1, the bottom valve assembly 1 among the utility model embodiment, oil storage cylinder assembly 2, piston assembly 3, piston rod 5, guide holder assembly 6 and oil sealing 7 etc. can be used existing traditional vibration damper part.

Claims

1. variable-damping shock, comprise bottom valve assembly (1), oil storage cylinder assembly (2), piston assembly (3), clutch release slave cylinder assembly (4), piston rod (5), guide holder assembly (6), oil sealing (7), it is characterized in that: clutch release slave cylinder assembly (4) is arranged in the oil storage cylinder assembly (2), clutch release slave cylinder assembly (4) is by seal ring (8), outer tube (9) and clutch release slave cylinder (10) are formed, the tube wall of clutch release slave cylinder (10) is drilled with size along generatrix direction and is Φ 1.0～3.0mm, pitch-row is 1～4 pair of circular hole of 25～60mm, each is uniform along the clutch release slave cylinder diametric(al) to circular hole, and the environment that hole and clutch release slave cylinder is outer separates, and its equilibrium position is the residing equilibrium position of piston of vibration damper under the load rating of vehicle.