CN2318452Y

CN2318452Y - Wedge force applied self-adaption damper

Info

Publication number: CN2318452Y
Application number: CN 96236426
Authority: CN
Inventors: 唐宏; 赵晓鹏
Original assignee: 赵晓鹏; 唐宏
Current assignee: Northwestern Polytechnical University
Priority date: 1996-11-15
Filing date: 1996-11-15
Publication date: 1999-05-12
Anticipated expiration: 2006-11-15

Abstract

The utility model relates to a wedge-shaped force applied self-adaptation damper which is composed of a damping cylinder (2), electrorheologic fluid arranged in the damping cylinder, a wedge-shaped force applied rod (1), piezoelectric ceramic boxes (5), a U-shaped wood supporting seat (6), a wooden frame (22) for fixing the damping cylinder. The utility model is mainly used for the vibration absorbing system of cars, motorcycles, etc., and adopts a new wedge-shaped force applied mechanism. The voltage outputs of the two piezoelectric ceramic boxes are connected to the electrodes of the damping cylinder by using the mode of connection in series. The whole damper has the advantages of high response sensitivity of the external vibration, more effective and reliable wedge-shaped force applied mechanism, etc. In addition, the damper whose negative feedback loop is composed of the piezoelectric ceramics and the electrorheologic liquid has automatic response to the external vibration. The whole damper has the characteristic of self adaptation.

Description

The self-adaptive damper of the wedge type application of force

The utility model relates to a kind of damping device of controlling vibration, self-adaptive damper that especially can the auto-control damping.

" self-adaptive damper that electrorheological fluid and piezoelectric constant are compound " (application number 96236145.3 by name of Zhao Xiaopeng, Tang Hong application; The applying date 960923) model utility is a class NEW ADAPTIVE current liquescent damper, since bigger in the damper with rigidity bigger spring and the extraneous vibration force that is added on the piston rod, make to use the restriction that is subjected to a certain degree.

The purpose of this utility model provides a kind of self-adaptive damper of the wedge type application of force, and it has adopted novel force application mechanism, and is not only less demanding to adding vibration force, and more sensitive to the feedback response of vibration.

The purpose of this utility model is achieved in that structure such as Fig. 1 of damper of the present utility model, and it is by damping tube (2), wedge type force application rod (1), piezoelectric constant box (5), the wooden bearing of U type (6), the fixing wooden cangue (22) of damping tube, six most of compositions such as current liquid (7).Wedge type force application rod top is connected with piston, and the wedge shape of its underpart places between two pressure handles of piezoelectric constant box, introduces respectively below:

The internal structure of damping tube such as Fig. 2, the inner stage casing of damping tube part is two donut column type electrodes, an electrode (9) is stuck (using epoxy resin) on damping tube inwall, another electrode (10) sticks in the damping tube by several (such as three) insulating strip (15), and the circle central axis of these two electrodes is all overlapped with the circle central axis of damping tube.Link to each other by insulating strip between these two electrodes, except that insulating strip is the gap (17) that can allow flow of liquid cross, and gap width is 1～3mm, sees Fig. 3 (Fig. 3 is the sectional view of tube).The electric lead of two electrodes (8) extracts by the aperture (14) on the damping tube.

The two ends up and down of damping tube are sealing plug (3) and (12) that two nylon are done, and circle centre position all has a hole that can just allow force application rod pass through beyond the Great Wall.These two sealing plugs have been sealed two ports up and down of damping tube fully.

Wedge type force application rod such as Fig. 2, the be fixed nylon wedge shape (4) of a hard of the lower end of its bar.The middle part of the bar piston (11) that is being fixed, the piston external diameter just internal diameter with interior electrode (10) is the same big.In addition, piston all has a returning spring (13) up and down.

Piezoelectric constant box (5) is the piezoelectric device that is used to light a fire that the wireless electroceramics spare of the Shandong Zibo factory of employing produces.Piezoelectric ceramic body (19) is placed on the grip box middle part, (18) be a pressure handle, when the pressure handle pommel was stressed, the compressing head (20) that the pressure handle band the other end rotated, compressing head compressing piezoelectric constant produces voltage, and the high voltage that piezoelectric constant produces is by lead (23) output of box bottom.Two piezoelectric constant boxes are towards being fixed by bolts to respectively on the U type bearing, as Fig. 1.The nail little plank (21) at a last center porose (24) of the upper end of U type bearing, the Kong Nengrang wedge type force application rod on it passes through, and to limit moving horizontally of this force application rod, sees Fig. 4.

Fixedly the wooden cangue (22) of damping tube is two of symmetry, and all there is the same big half-arc groove with damping tube external diameter of a diameter at two middle part, and when these two wooden cangues close when disturbing, middle damping tube just has been fastened on the neutral position vertically.

The working procedure of whole damper when realizing vibration damping is as follows: extraneous vibration acts on the upper end of wedge type force application rod, make this force application rod up-down vibration, when it moves downward, because the effect of wedge shape (4) wedge surface, promote the outwards turn of two pressure handles (18) of piezoelectric constant box, make the piezoelectric constant in the grip box be squeezed output voltage.The voltage of output is received by lead (23) on the electric lead (8) of two electrodes of damping tube.The lead connection of two piezoelectric constant box generation voltages can be used serial fashion, and the voltage output more to be increased fully encourages the current liquid in the damping tube.When moving downward along with the wedge type force application rod, the current liquid that piston on the bar promotes downwards to be filled in the damping tube moves downward, because the restriction of damping tube and sealing plug, electrorheological fluid can only upwards flow back in the chamber above the piston by two gaps between electrodes.At this moment owing to had electric field between two electrodes, when flowing through, electrorheological fluid is cured, constricted flow, and conversely, this resistance acts on the piston again, thereby has suppressed the motion of piston.

Different along with the amplitude of extraneous vibration and frequency, the magnitude of voltage of piezoelectric constant output is also different, and (amplitude-frequency is high more, output voltage is high more), solidification to current liquid is also different, just be reflected at last and can " access " suitable magnitude of voltage automatically different vibration strong or weak (amplitude is different with frequency), these magnitude of voltage corresponding again the suitable viscosity of current liquid change, thereby realized " automatically " adjusting of damping size, adaptive process that Here it is.

The outstanding feature of damper after the improvement is to have improved boosting mechanism.Before having avoided will be with rigidity very strong spring.More more reliable than original damper, the feedback sensitivity of voltage also improves a lot.Exactly two piezoelectric constant box output voltages are together in series in addition, have improved the actual magnitude of voltage that is added on the electrode.

This damper can extensively apply in the shock absorption system of suspensions such as automobile, motorcycle.

Claims

1. the self-adaptive damper of the wedge type application of force, by damping tube (2), wedge type force application rod (1), piezoelectric constant box (5), the wooden bearing of U type (6), the fixing wooden cangue (22) of damping tube, six most of compositions such as current liquid (7), it is characterized in that: wedge type force application rod top is connected with piston, and the wedge shape of its underpart places between two pressure handles of piezoelectric constant box.

2. the self-adaptive damper of the wedge type application of force as claimed in claim 1 is characterized in that the interior electrode of damping tube adopts the method for fixed electrode, and external electrode is fixed on the inwall of damping tube, and interior electrode and external electrode gap are 1～3mm.

3. the self-adaptive damper of the wedge type application of force as claimed in claim 1 is characterized in that being fixed with piston on the wedge type force application rod, and the external diameter of piston is identical with the internal diameter of interior electrode.

4. the self-adaptive damper of the wedge type application of force as claimed in claim 1, it is characterized in that piezoelectric constant is installed in the piezoelectric constant box that has pressure handle, the wedge shape of wedge type force application rod promotes pressure handle, make the piezoelectric constant pressurized, the voltage of output is received on the interior electrode of damping tube by (two piezoelectric constant boxes are arranged) after being connected.