CN202484173U

CN202484173U - Magnetorheological elastomer swing rotary type damper

Info

Publication number: CN202484173U
Application number: CN2012200976655U
Authority: CN
Inventors: 谭和平; 谢宁; 刘强; 谭晓婧
Original assignee: 谢宁
Priority date: 2012-03-15
Filing date: 2012-03-15
Publication date: 2012-10-10
Anticipated expiration: 2022-03-15

Abstract

The utility model discloses a magnetorheological elastomer swing rotary type damper which comprises a rocking bar, a rotating shaft, a working cavity and a dumper block. The cross-section of the working cavity is of semi-circle shape, holes are disposed at centers of the circle positions of an upper base and a lower base of the semi-circle shape working cavity. Diameters of the holes are larger than external diameter of the rotating shaft, and activity spaces are reserved. A layer of magnetorheological elastomer is fixed on the inner surface of an arc edge of the semi-circle shape working cavity. The dumper block is of V shape. A magnet exciting coil is winded on the V-shaped bumper block. Semi-circle grooves are respectively arranged in the middle of two branch end faces of the V-shaped bumper block, and dumper idler wheels are respectively arranged inside the two semi-circle grooves. The rotating shaft is fixed in the middle of the rocking bar, one end of the rocking bar is fixed with the bottom of the V-shaped bumper block, and the V-shaped bumper block is disposed inside the semi-circle shape working cavity. The rotating shaft in the middle of the rocking bar extends from two ends of the working cavity through the round holes arranged on the upper base and the lower base of the working cavity.

Description

Magnetic rheology elastic body swing rotary damper

Technical field

The utility model belongs to a kind of damper, is specifically related to a kind of magnetic rheology elastic body swing rotary damper.

Background technique

Common rotary damper is to utilize viscous grease that the motion of moving element is produced damping force to realize; The big I of its damping force is adjusted through the grease of changing different viscosity; But the moment of torsion of this type rotary damper in use can not be adjusted in good time, and for this reason, people utilize magnetic flow liquid under the different magnetic field condition, to have different viscosity again rotary damper is improved; Like: one Chinese patent application number be: " a kind of Wobble wheel rotary magneto-rheological damper " of 200910251078.X; Although the rotary damper after improving---" a kind of Wobble wheel rotary magneto-rheological damper " has viscosity adjustable superperformance in good time, this Wobble wheel rotary magneto-rheological damper need carry out motive sealing to turning axle, leaks to prevent magnetic flow liquid wherein; Because magnetic flow liquid is the amalgam that in mineral oil, is added with the attritive powder of multiple composition; Therefore, it is carried out very difficulty of motive sealing, in case the leakage of magnetic flow liquid takes place; Light then make its decreased performance, heavy then make its total failure.

Summary of the invention

In the deficiency that exists aspect the turning axle motive sealing, the utility model provides novel MR damper to existing Wobble wheel rotary magneto-rheological damper, that is: a kind of magnetic rheology elastic body swing rotary damper.

The technological scheme of the utility model is following: a kind of magnetic rheology elastic body swing rotary damper, and it comprises: rocking bar, turning axle, active chamber and damping block; The cross section of active chamber is semicircle; Upper base at semicircle active chamber is porose with the circle centre position of going to the bottom; The diameter in hole is greater than the external diameter of turning axle and leave the free gap, has fixed one deck magnetic rheology elastic body at the internal surface on the circular arc limit of semicircle active chamber, and damping block is a V-arrangement; On the V-arrangement damping block, be wound with field coil; All there is a semicircular groove at middle part at two branch end faces of V-arrangement damping block, in two semi-circular recesses, the damping roller is installed all, the justify align of two damping rollers and shaft axis keeping parallelism; Turning axle is fixed on the middle part of rocking bar; One end of rocking bar and the bottom of V-arrangement damping block are fixed; The V-arrangement damping block places in the semicircle active chamber; The turning axle at rocking bar middle part stretches out from the two ends in the active chamber through active chamber upper base and circular hole on going to the bottom; Two branch end faces of V-arrangement damping block and the spacing between the internal surface of active chamber circular arc limit are greater than the thickness of active chamber circular arc limit internal surface magnetic rheology elastic body; Two branch end face semi-circular recesses internal damping rollers of V-arrangement damping block and the spacing between the internal surface of active chamber circular arc limit are less than the thickness of active chamber circular arc limit internal surface magnetic rheology elastic body, and the damping roller on active chamber circular arc limit, V-arrangement damping block and the V-arrangement damping block is made up of permeability magnetic material, the upper base of active chamber with go to the bottom and rocking bar is made up of non-magnet_conductible material.

After the technological scheme that has adopted the utility model; Just thoroughly solved the technical barrier of Wobble wheel rotary magneto-rheological damper aspect the turning axle motive sealing; The functional reliability of this type damper is improved greatly; The function of the utility model be achieved in that since two branch end faces of V-arrangement damping block and the spacing between the internal surface of active chamber circular arc limit greater than the thickness of active chamber circular arc limit internal surface magnetic rheology elastic body; Two branch end face semi-circular recesses internal damping rollers of V-arrangement damping block and the spacing between the internal surface of active chamber circular arc limit are less than the thickness of active chamber circular arc limit internal surface magnetic rheology elastic body; So; When the other end (or turning axle) the drive V-arrangement damping block of rocking bar slided in active chamber, the magnetic rheology elastic body of active chamber circular arc limit internal surface will be flattened by the damping roller on two branch end faces of V-arrangement damping block, will receive certain damping of oscillations power and gyrodamping power thereby rocking bar (or turning axle) drive V-arrangement damping block is slided in active chamber; When field coil does not have electric current to pass through on the V-arrangement damping block; There is not the magnetic line of force to pass through the magnetic rheology elastic body of active chamber circular arc limit internal surface; Therefore; The elasticity of active chamber circular arc limit internal surface magnetic rheology elastic body is less; The magnetic rheology elastic body of damping roller roll extrusion active chamber circular arc limit internal surface will receive less pressure on the V-arrangement damping block, and damping of oscillations power and gyrodamping power suffered when rocking bar (or turning axle) drive V-arrangement damping block is slided in active chamber are less, and the magnetic rheology elastic body of active chamber circular arc limit internal surface is returning to normal after being flattened by the damping roller immediately; After field coil on the V-arrangement damping block feeds electric current; The V-arrangement damping block will generate an electromagnetic field; Because of the damping roller on active chamber circular arc limit, V-arrangement damping block and the V-arrangement damping block constitutes by permeability magnetic material; So the magnetic line of force that V-arrangement damping block electromagnetic field produces can pass through two ends end face, the damping roller on the end face of V-arrangement damping block two ends of V-arrangement damping block, V-arrangement damping block, the magnetic rheology elastic body and the active chamber circular arc limit formation closed magnetic circuit of active chamber circular arc limit internal surface; When the other end (or turning axle) the drive V-arrangement damping block of rocking bar slides in active chamber; The electromagnetic field that the V-arrangement damping block produces will along with the V-arrangement damping block on active chamber circular arc limit slip and move on active chamber circular arc limit; Make the ferromagnetic particle in the magnetic rheology elastic body of the damping roller that is on V-arrangement damping block two ends end face and the V-arrangement damping block two ends end face and active chamber circular arc limit internal surface form chain or column aggregated structure and make its elasticity higher at magnetic direction; Therefore; When the higher magnetic rheology elastic body of the elasticity on the internal surface of roll extrusion active chamber circular arc limit of the damping roller on the end face of V-arrangement damping block two ends, will receive bigger pressure; Damping of oscillations power and gyrodamping power suffered when rocking bar (or turning axle) drive V-arrangement damping block is slided in active chamber are bigger, and the magnetic rheology elastic body of active chamber circular arc limit internal surface only just can return to normal behind the zone of leaving the magnetic fidle of end effect of V-arrangement damping block two ends after being flattened by the damping roller; If rocking bar drives the V-arrangement damping block and on active chamber circular arc limit, reciprocatingly slides; Magnetization once more that the magnetic rheology elastic body that has then returned to normal on the internal surface of active chamber circular arc limit will (be slipped over the electromagnetic field of the V-arrangement damping block that comes) again and elasticity uprises and by damping roller roll extrusion on the end face of V-arrangement damping block two ends, so reciprocating.

Compare with existing Wobble wheel rotary magneto-rheological damper; Not only solved the leakage problem of magnetic flow liquid because of magnetic rheology elastic body swing rotary damper; And, gyrodamping power also damping of oscillations power can be provided when being provided; Therefore, magnetic rheology elastic body swing rotary damper can have been expanded the using scope of existing Wobble wheel rotary magneto-rheological damper greatly.

Description of drawings

Fig. 1 is a kind of structural representation of the utility model.

Fig. 2 is that the A-A of Fig. 1 is to sectional view.

Fig. 3 is the work schematic representation of the utility model, and the dotted line among the figure is the schematic representation that electromagnetic field formed closed magnetic circuit after field coil was switched on the V-arrangement damping block in the utility model.

Fig. 4 is the working state schematic representation of V-arrangement damping block when upwards sliding in the utility model.

Embodiment

Specify the structure of the utility model below in conjunction with accompanying drawing:

Referring to Fig. 1 and Fig. 2; This is a kind of concrete structure of the utility model; A kind of magnetic rheology elastic body swing rotary damper, it comprises: the rocking bar 13 that is made up of non-magnet_conductible material, the turning axle 14, the active chamber 26 that are made up of non-magnet_conductible material and the damping block 25 that is made up of permeability magnetic material; The cross section of active chamber 26 is semicircle; At the upper base 20 that constitutes by non-magnet_conductible material of semicircle

active chamber

26 and 21 the circle

centre position porose

22 and 12 of going to the bottom that constitutes by non-magnet_conductible material;

Hole

22 and 12 diameter are greater than the external diameter of turning axle 14 and leave the free gap, have fixed one deck magnetic rheology elastic body 2 at the internal surface on the circular arc limit 1 that is made up of permeability magnetic material of semicircle active chamber 26; Damping block 25 is a V-arrangement; On V-arrangement damping block 25, be wound with field coil 3 and 8; At two branch end faces 4 of V-

arrangement damping block

25 and 6 middle part a

semicircular groove

9 and 10 are arranged all; In two

semi-circular recesses

9 and 10,

damping roller

5 and 7 are installed; Damping roller 5 is installed in the semi-circular recesses 10 interior (mounting type of damping roller 7 is identical with it, and the installation diagram of damping roller 7 is omitted) of V-arrangement damping block 25 through the axle 23 and 24 on it, damping

roller

5 and 7 justify align and shaft axis keeping parallelism; Turning axle 14 is fixed on the middle part of rocking bar 13; One end of rocking bar 13 and the bottom of V-arrangement damping block 25 are fixed; V-arrangement damping block 25 places in the semicircle active chamber 26; The upper base 20 of the turning axle 14 at rocking bar 13 middle parts through active chamber 26 stretches out from active chamber 26 interior two ends with 12 with the circular hole 22 of going to the bottom on 21; Two branch end faces 4 of V-

arrangement damping block

25 and 6 and active chamber circular arc limit 1 internal surface between spacing W2 greater than the thickness W3 of active chamber circular arc limit 1 internal surface magnetic rheology elastic body 2; Two branch end faces 4 of V-

arrangement damping block

25 and 6

semi-circular recesses

9 and 10

internal damping rollers

5 and 7 and active chamber circular arc limit 1 internal surface between spacing W1 less than the thickness W3 of active chamber circular arc limit 1 internal surface magnetic rheology elastic body 2, control power supply 15 through lead-in wire 16 with 17 with V-arrangement damping block 25 on field coil 3 be connected (referring to Fig. 3) with 8.

Now combination figure Fig. 1, Fig. 2, Fig. 3 and Fig. 4 further describe a kind of magnetic rheology elastic body swing rotary damper of the utility model: controlling power supply 15 not on V-arrangement damping block 25 when field coil 3 and 8 output currents; There is not the magnetic line of force to pass through the magnetic rheology elastic body 2 of active chamber circular arc limit 1 internal surface; Therefore; The elasticity of active chamber circular arc limit 1 internal surface magnetic rheology elastic body 2 is less; The magnetic rheology elastic body 2 of

damping roller

5 and 7 roll extrusion active chamber circular arc limits, 1 internal surface will receive less pressure on the V-arrangement damping block 25, and damping of oscillations power and gyrodamping power suffered when rocking bar 13 (or turning axle 14) drive V-arrangement damping block 25 is upwards slided in active chamber 26 are less;

When controlling power supply 15 behind field coil 3 on the V-arrangement damping block 26 and 8 output currents; V-arrangement damping block 25 will generate an electromagnetic field; Because of the damping roller 5 on active chamber circular arc limit 1, V-arrangement damping block 25 and the V-

arrangement damping block

25 and 7 constitutes by permeability magnetic material; So the magnetic line of force that V-arrangement damping block 25 electromagnetic fields produce can (see for details: Fig. 3) through the two ends end face 4 and 6 of V-arrangement damping block 25, V-arrangement damping block 25, the

damping roller

5 and 7 on the V-arrangement damping block 25 two ends end faces, the magnetic rheology elastic body 2 and the active chamber circular arc limit 1 formation closed magnetic circuit of active chamber circular arc limit 1 internal surface; When the other end (or turning axle 14) the drive V-arrangement damping block 25 of rocking bar 13 upwards slides in active chamber 26; The electromagnetic field that V-arrangement damping block 25 produces will (see for details: Fig. 4) along with the slip and on active chamber circular arc limit 1 move of V-arrangement damping block 25 on active chamber circular arc limit 1; Make be in V-arrangement damping block 25 two ends end faces 4 and 6 and V-arrangement damping block 25 two ends end faces on

damping roller

5 and 7 and active chamber circular arc limit 1 internal surface between magnetic rheology elastic body 2 in ferromagnetic particle form chain or column aggregated structure and make its elasticity higher at magnetic direction; Therefore; When the higher magnetic rheology elastic body 2 of the damping roller 5 on the V-arrangement damping block 25 two ends end faces and 7 elasticity on 1 internal surface of roll extrusion active chamber circular arc limit, will receive bigger pressure, damping of oscillations power and gyrodamping power suffered when making rocking bar 13 (or turning axle 14) drive V-arrangement damping block 25 in active chamber 26, upwards to slide are bigger.

To drive V-arrangement damping block 25 situation during to lower slider in active chamber 26 similar with it when the other end (or turning axle 14) of rocking bar 13, repeats no more here.

Claims

1. a magnetic rheology elastic body is swung rotary damper; It comprises: rocking bar, turning axle, active chamber and damping block; It is characterized in that: the cross section of said active chamber is for semicircle; Porose with the circle centre position of going to the bottom at the upper base of semicircle active chamber, the diameter in hole is greater than the external diameter of turning axle and leave the free gap, has fixed one deck magnetic rheology elastic body at the internal surface on the circular arc limit of semicircle active chamber; Said damping block is a V-arrangement; On the V-arrangement damping block, be wound with field coil; All there is a semicircular groove at middle part at two branch end faces of V-arrangement damping block, in two semi-circular recesses, the damping roller is installed all, the justify align of two damping rollers and shaft axis keeping parallelism; Said turning axle is fixed on the middle part of rocking bar; One end of said rocking bar and the bottom of V-arrangement damping block are fixed; The V-arrangement damping block places in the semicircle active chamber; The turning axle at rocking bar middle part stretches out from the two ends in the active chamber through active chamber upper base and circular hole on going to the bottom; At two branch end faces of V-arrangement damping block and the spacing between the internal surface of the active chamber circular arc limit thickness greater than active chamber circular arc limit internal surface magnetic rheology elastic body, two branch end face semi-circular recesses internal damping rollers of V-arrangement damping block and the spacing between the internal surface of active chamber circular arc limit are less than the thickness of active chamber circular arc limit internal surface magnetic rheology elastic body.

2. a kind of magnetic rheology elastic body swing rotary damper as claimed in claim 1, it is characterized in that: the damping roller on said active chamber circular arc limit, V-arrangement damping block and the V-arrangement damping block is made up of permeability magnetic material; The upper base of said active chamber with go to the bottom and rocking bar is made up of non-magnet_conductible material.