CN2851714Y - Damping force adjustable vibration damper - Google Patents

Abstract

The utility model discloses a vibration damper with adjustable damping force, which is characterized in that a piston rod (2) is a hollow body, an adjuster rod (1) is arranged in the hollow body of the piston rod, a valve core (8) is arranged in the hollow body of the piston rod, which passes through a valve body (10), the valve core and the adjuster rod are connected into one body, the radical direction of the valve core is provided with orifices (14, 15) corresponding to oil holes (5, 6) on the piston rod, and the walls of the orifices are provided with elongated slots (14', 15') which are communicated with the orifices. The utility model adjusts the valve core via rotating the adjuster rod, which causes the position of the orifices on the valve core and the position of the oil holes on the piston rod to change continually and causes the oil holes on the piston rod to open and shut from time to time, so that the aim of adjusting the damping force is achieved. Therefore, the riding comfort and the handling stability of automobiles can be both satisfied.

Description

The vibration damper that a kind of damping force is adjustable

[technical field]

The utility model relates to a kind of component in the suspension system in a kind of automobile, particularly be the vibration damper of damping-force adjustable in a kind of active suspension system.

[background technique]

In the suspension system of automobile,, elastic element produces vibration because being hit, for improving vehicle running smoothness, be installed in parallel vibration damper with elastic element in the suspension, be attenuation vibration, adopt vibration damper to be mostly hydraulic shock absorber in the automobile suspension system, its working principle is that the piston in the vibration damper moves up and down when being subjected to vibration relative movement to occur between vehicle frame (or vehicle body) and vehicle bridge, and the fluid in the vibration damper chamber just flows in another chamber through different holes from a chamber repeatedly.The intermolecular interior friction of friction between hole wall and fluid and fluid at this moment forms damping force to vibration, makes automobile vibrational energy be converted into fluid heat energy, is dispersed in the atmosphere by the vibration damper absorption again.In the prior art, a kind of more advanced vibration damper is arranged, it mainly also is to be made of piston rod, rotation valve rod and piston, the vibration damper of this structure is realized the conversion of damping force by rotation valve rod, can be required size thereby control absorber damping force by the circulation area of throttle orifice in the three phases conversion vibration damper.But the vibration damper of this structure and since its throttle orifice adopts whole are circular through holes, when regulating its fluid flow, can produce and hold suddenly or the phenomenon of all standing.Be applied in the suspension system of automobile, can make the smoothness of automobile and control stability become relatively poor, and make its stopping distance elongated, sideway skid resistance is poor.

[summary of the invention]

In view of the problem that known technology exists, the technical problems to be solved in the utility model provides a kind of vibration damper of damping-force adjustable, the interior fluid flow of vibration damper is changed in the mode of gradual change, and the smoothness of automobile and control stability can both be met.In order to solve the problems of the technologies described above, the utility model adopts following technological scheme to realize: the vibration damper that a kind of damping force is adjustable, include stock solution tube, the vibration damper cylinder body, damping spring, valve body, piston and piston rod, described piston is partitioned into upper oil cavitie and lower oil cavitie with the vibration damper cylinder body, described vibration damper cylinder body places in the stock solution tube, described damping spring is enclosed within on the piston rod, described piston rod passes valve body and is connected with piston, the part of passing valve body on the described piston rod is provided with the oilhole more than two, it is characterized in that described piston rod is a hollow article, in the hollow article of described piston rod, be provided with regulating rod, in passing the hollow article of valve body, piston rod is provided with spool, described spool and regulating rod are connected as a single entity, radially being provided with and the corresponding throttle orifice of piston rod upper oil hole of described spool, the hole wall of described throttle orifice is provided with the elongated slot that is communicated with throttle orifice.

In the utility model, in piston passes the hollow article of valve body, spool is set, and spool radially be provided with the corresponding throttle orifice of piston rod upper oil hole after, come regulating spool by the rotation regulating rod, the throttle orifice on the spool and the position of the oilhole on the piston rod are constantly changed, when making throttle orifice and open, the time and close, change the flow that fluid flows through throttle orifice thus, and reach the purpose of regulating damping force; And be provided with on the hole wall of throttle orifice with elongated slot that throttle orifice is communicated with after, the flow by throttle orifice of fluid in the vibration damper is changed in the mode of gradual change, overcome and open suddenly in the prior art or all standing and the shortcoming that produces; This vibration damper is applied in the suspension system of automobile, by the control of electronic controller, the longitudinal oscillation problem that body roll that automobile turning occurs, braking, acceleration etc. are caused is resolved; Adopt the vibration damper of the utility model design, when carload changes, even also can keep vehicle body steady in rough travels down; And can must be bigger with the rigidity Design of resisting side-tipping of automobile, anti-pitch, the driving safety of automobile is improved; And can make full use of the condition of adhering on automotive wheel and ground, and quicken braking process, shorten stopping distance, and improved the sideway skid resistance of automobile, when travelling on different roads, can regulate the height of vehicle body automatically, and can guarantee that the smoothness of automobile and control stability can both be met.

[description of drawings]

Further describe the relevant details of the utility model embodiment below more in conjunction with the accompanying drawings.

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the enlarged view at the utility model Fig. 1 M place;

Fig. 3 is the structural representation of spool.

[embodiment]

In conjunction with the accompanying drawings, the vibration damper that this damping force is adjustable, include stock solution tube 11, vibration damper cylinder body 12, damping spring 3, valve body 10, piston 9 and piston rod 2, described piston 9 is partitioned into upper oil cavitie 3 and lower oil cavitie 13 with vibration damper cylinder body 12, described vibration damper cylinder body 12 places in the stock solution tube 11, described damping spring 3 is enclosed within on the piston rod 2, described piston rod 2 passes valve body 10 and is connected with piston 9, the part of passing valve body 10 on the described piston rod 2 is provided with three oilholes 5,6,7, described piston rod 2 is a hollow article, in the hollow article of described piston rod 2, be provided with regulating rod 1, in passing the hollow article of valve body 10, piston rod 2 is provided with spool 8, described spool 8 is connected as a single entity with regulating rod 1, radially being provided with and piston rod 2 upper oil holes 5 of described spool 8,6 corresponding three throttle orifices 14,15, at described throttle orifice 14,15 hole wall be provided with the elongated slot 14 that is communicated with throttle orifice ', 15 ', the setting of this elongated slot, when making circular throttle orifice Close All, fluid is all blocked, but also had part fluid to circulate by this elongated slot; When throttle orifice that perhaps should circle was opened, its flow was not unexpected increase, but ascending change flow, and the flow that passes through throttle orifice that makes fluid changes in the mode of gradual change, had solved the defective that the cataclysm owing to its flow brings.When the throttle orifice on the spool 8 14,15 is all opened, the damping force minimum of vibration damper, this moment, vibration damper was in " soft " damping force state; Throttle orifice 14 on spool 8 is closed, and when the flute profile direction of throttle orifice 15 was opened, damping force was moderate, and vibration damper is in " medium " damping force state; When throttle orifice all on the spool 8 14,15 is closed, its damping force maximum, at this moment, vibration damper is in " firmly " state.Regulating rod 1 in the utility model is in transmission connection with stepper motor, and stepper motor is by the electronic controller controls in the automobile suspension system.This electronic controller can monitor the parameter of different road conditions, and be electrical signal with these parameter changes, these electrical signal can be delivered to stepper motor, stepper motor just can be regulated the damping force of vibration damper, thereby realize the sensing capability of vehicle to the ground stochastic vibration, make the in good time adjustment of vehicle, thereby reach travelling comfort, smoothness and the control stability that the vehicle frame is taken advantage of all road conditions vibrations.

Claims (2)

1, the vibration damper that a kind of damping force is adjustable, include stock solution tube (11), vibration damper cylinder body (12), damping spring (3), valve body (10), piston (9) and piston rod (2), described piston (9) is partitioned into upper oil cavitie (4) and lower oil cavitie (13) with vibration damper cylinder body (12), described vibration damper cylinder body (12) places in the stock solution tube (11), described damping spring (3) is enclosed within on the piston rod (2), described piston rod (2) passes valve body (10) and is connected with piston (9), the part of passing valve body (10) on the described piston rod (2) is provided with oilhole (5,6,7), it is characterized in that described piston rod (2) is a hollow article, in the hollow article of described piston rod (2), be provided with regulating rod (1), in passing the hollow article of valve body (10), piston rod (2) is provided with spool (8), described spool (8) is connected as a single entity with regulating rod (1), radially being provided with and piston rod (2) upper oil hole (5 of described spool (8), 6,7) corresponding throttle orifice (14,15,16), at described throttle orifice (14,15, the elongated slot that hole wall 16) is provided with and throttle orifice (14,15,16) is communicated with (14 ', 15 ', 16 ').

2, the adjustable vibration damper of a kind of damping force according to claim 1 is characterized in that the oilhole on the described piston rod (2) is provided with two at least.

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