CN2289907Y

CN2289907Y - Cylinder current transformation absorber

Info

Publication number: CN2289907Y
Application number: CN 97200698
Authority: CN
Inventors: 李天剑; 魏宸官
Original assignee: Beijing Institute of Technology BIT
Current assignee: Beijing Institute of Technology BIT
Priority date: 1997-01-22
Filing date: 1997-01-22
Publication date: 1998-09-02
Anticipated expiration: 2007-01-22

Abstract

The utility model relates to a cylinder current transformation absorber, which is used for suspension devices of various automobiles, armoured cars and tanks, and can also be used for supports of engines or other shock absorption systems. The absorber comprises an inner cylinder, a middle cylinder, an outer cylinder, a piston and a piston rod; the piston rod which is provided with the piston is arranged in the inner cylinder; small holes are distributed along the periphery of the upper part and lower part of the inner cylinder; the inner cylinder is sheathed in the middle cylinder; the middle cylinder is arranged in the outer cylinder. The absorber can provide moderate damping force quickly and accurately according to different running conditions of vehicles, which can improve the riding comfort and the running safety obviously and meet high requirements to suspension forks of vehicles.

Description

The cartridge type current transformation vibration damper

The utility model relates to a kind of suspension arrangement that is used for various automobiles, armored vehicle and tank, also can be used in other shock mitigation systems such as engine bearer.

At present, the bitubular dydraulic shock absorbers that adopt in the external vehicle suspension system more, this vibration damper can only be realized three-stage damping control at most.The vibration damper of China's widespread usage still belongs to passive vibration damper, can not realize the quick adjustment of damping force, and therefore the damping force of appropriateness can not in time be provided according to the difference of pavement conditions, influences ride comfort and travel safety.Present stage is in stage of structure imagination and computer simulation mostly about the research of current transformation vibration damper, also has minority can tentatively realize the concrete structure appearance that rapid damping power is regulated.Can report 910744 and SAE report 881134 referring to SAE, Chinese patent No:93240175.9.

The purpose of this utility model is the deficiency that exists in above-mentioned existing technology and a kind of current transformation vibration damper that designs.It changes the shearing stress of the current liquid in the runner by the electric field that changes between runner, thereby regulates damping force.

Above-mentioned purpose of the present utility model is realized by following technological scheme: this cartridge type current transformation vibration damper, comprise inner core, middle tube, urceolus, on, lower end cap, piston and piston rod, tube in the cover in the urceolus, cover inner core in the middle tube, inner core top and bottom are laid with at least 4 aperture E along periphery, on middle tube and the inner core top insulating lid is housed, insulating lid is with upper end cap outside the top, upper end cap outer end and urceolus are connected, and sealing cover is housed on the upper end cap, and piston is equipped with in the solid piston bar lower end in the inner core, the piston rod upper end passes insulating lid and sealing cover, and be connected with connecting ring, middle tube is equipped with the recessed following insulating lid in bottom with the inner core lower end, and following insulating lid is provided with normal open hole and recuperation valve, following insulating lid bottom has logical hydraulic fluid port, end cap is loaded in following insulating lid bottom, and lower end cap outer end and urceolus are connected, the lower end cap bottom connecting ring that is connected.

The present invention compares with existing technology has following advantage: owing to the invention belongs to active damper, can be according to the difference of vehicle driving condition, the damping force of appropriateness is provided rapidly and accurately, obviously improves ride comfort and driving safety, satisfy the high request of vehicle suspension.

Concrete structure of the present utility model is with shown in Figure 1

Fig. 1 is the overall structure schematic representation of vibration damper.

Main structure is among the figure: lower end cap 1, O RunddichtringO 2, following insulating lid 3, normal open hole 4, recuperation valve 5, nut 6, piston 7, piston rod 8, urceolus 9, middle tube 10, inner core 11, seal ring 12, connecting ring 13, nylon lining 14, screw 15, sealing cover 16, upper end cap 17, insulating lid 18, logical hydraulic fluid port 19, epicoele A, cavity of resorption B, annular space C, liquid storage cylinder D, aperture E.

Below in conjunction with accompanying drawing the utility model is described in detail.

This cartridge type current transformation vibration damper, comprise inner core 11, middle tube 10, urceolus 9, upper and

lower end cap

17,1, piston 7 and piston rod 8, tube 10 in the cover in the urceolus 9, cover inner cores 11 in the middle tube 10, inner core 11 tops and bottom are laid with at least 4 aperture E along periphery, on middle tube 10 and inner core 11 tops insulating lid 18 is housed, be with upper end cap 17 outside the insulating lid top, upper end cap 17 outer ends and urceolus 9 are connected, sealing cover 16 is housed on the upper end cap 17, piston 7 is equipped with in solid piston bar 8 lower ends in the inner core 11, and piston rod 8 bottoms have nut 6 that piston 7 is tightened up.Piston is divided into epicoele A and cavity of resorption B with inner core, piston rod 8 upper ends pass insulating lid 18 and sealing cover 16, and be connected with connecting ring 13, middle tube 10 is equipped with the recessed following insulating lid 3 in bottom with inner core 11 lower ends, following insulating lid 3 is provided with normal open hole 4 and recuperation valve 5, has logical hydraulic fluid port 19 on following insulating lid 1 lower part wall, and end cap 1 is loaded in following insulating lid 3 bottoms, lower end cap 1 outer end and urceolus 9 are connected, the lower end cap 1 bottom connecting ring 13 that is connected.

Inner core top and lower periphery have aperture E, and this makes liquid to flow in A, B chamber by the annular space C between middle tube and inner core.O RunddichtringO 2 and o RunddichtringO 12 are arranged on the insulating lid 18, and the endoporus of insulating lid 18 plays the leading role to piston rod 8.Lower end cap 1 is connected with urceolus 9 by screw thread, simultaneously following insulating lid 3 is played fixation.O RunddichtringO 2 on the lower end cap 1 is sealed fluid and is not leaked outside.Be welded to connect ring 13 on the lower end cap 1, be with nylon lining 14 in the connecting ring 13.Upper end cap 17 is connected with urceolus 9 by screw thread, insulating lid 18 can be tightened up when tightening.Sealing cover 16 is fixed tightly on the upper end cap 17 by screw 15, and the effect of sealing cover 16 is to tighten up seal ring 12, makes connecting ring 13 and upper end cap 17 insulation simultaneously.

Fill fluid during use in the vibration damper, positive polarity is added on the piston rod, urceolus ground connection.Inner core becomes electrode anode by piston like this, and middle tube becomes the electrode negative pole by urceolus ground connection, forms electric field between the C of annular space.Under "on" position, when piston moves downward in inner core, normal open hole 4 under the sub-fraction current liquid passes through earlier on the insulating lid 3, logical hydraulic fluid port 19 through the bottom enters shoe cream room D again, the hole E of most of current liquid by the inner core two ends enters when the C of annular space, its shearing stress increases, and produces bigger flow resistance, has increased the pressure reduction between A, B chamber.The electric field change then shearing stress of current liquid changes, thereby the pressure reduction between A, B chamber is changed, and has regulated damping force.When piston moved upward, recuperation valve 5 was opened, and the current liquid in D chamber is by its compensation B chamber, and the current liquid in A chamber flows into the B chamber by the aperture E of annular space C on inner core simultaneously, moved upward similarly to piston, and electric field makes damping force become big.Because the continuous variation of electric field can make the shearing stress of current liquid change continuously, so the continuous variation of electric field can cause the continuous variation of absorber damping force.

Under the no electric circuit state, when piston moved up and down in inner core, C did not have electric field in the chamber, and shearing stress did not change when then current liquid was by the C chamber, the damping force minimum that provide this moment.Otherwise when if the electric field in C chamber is maximum, shearing stress maximum when current liquid is flowed through the C chamber produces the highest damping force this moment.

Claims

1. cartridge type current transformation vibration damper, it is characterized in that comprising inner core 11, middle tube 10, on the urceolus 9, lower end cap 17,1, piston 7 and piston rod 8, tube 10 in the cover in the urceolus 9, cover inner cores 11 in the middle tube 10, inner core 11 tops and bottom are laid with at least 4 aperture E along periphery, on middle tube 10 and inner core 11 tops insulating lid 18 is housed, be with upper end cap 17 outside the insulating lid top, upper end cap 17 outer ends and urceolus 9 are connected, sealing cover 16 is housed on the upper end cap 17, piston 7 is equipped with in solid piston bar 8 lower ends in the inner core 11, piston rod 8 upper ends pass insulating lid 18 and sealing cover 16, and be connected with connecting ring 13, middle tube 10 is equipped with the recessed following insulating lid 3 in bottom with inner core 11 lower ends, and following insulating lid 3 is provided with normal open hole 4 and recuperation valve 5, following insulating lid 1 bottom has logical hydraulic fluid port 19, end cap 1 is loaded in following insulating lid 3 bottoms, and lower end cap 1 outer end and urceolus 9 are connected, the lower end cap 1 bottom connecting ring 13 that is connected.