CN104613103B - Leading trailing shoe drum brake applying force through trailing shoe giant magnetostictive and method thereof - Google Patents
Leading trailing shoe drum brake applying force through trailing shoe giant magnetostictive and method thereof Download PDFInfo
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- CN104613103B CN104613103B CN201410785790.9A CN201410785790A CN104613103B CN 104613103 B CN104613103 B CN 104613103B CN 201410785790 A CN201410785790 A CN 201410785790A CN 104613103 B CN104613103 B CN 104613103B
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- 229920001971 elastomer Polymers 0.000 claims abstract 3
- 125000006850 spacer group Chemical group 0.000 claims abstract 3
- 210000000003 hoof Anatomy 0.000 claims description 113
- 230000005284 excitation Effects 0.000 claims description 48
- 230000000694 effects Effects 0.000 claims description 17
- 238000012856 packing Methods 0.000 claims description 14
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 claims description 13
- 229920001195 polyisoprene Polymers 0.000 claims description 13
- 230000005389 magnetism Effects 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 3
- HDRXZJPWHTXQRI-BHDTVMLSSA-N diltiazem hydrochloride Chemical compound [Cl-].C1=CC(OC)=CC=C1[C@H]1[C@@H](OC(C)=O)C(=O)N(CC[NH+](C)C)C2=CC=CC=C2S1 HDRXZJPWHTXQRI-BHDTVMLSSA-N 0.000 claims 2
- 230000005611 electricity Effects 0.000 claims 2
- 230000007246 mechanism Effects 0.000 abstract description 3
- 230000003014 reinforcing effect Effects 0.000 description 9
- 239000000463 material Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 230000004044 response Effects 0.000 description 1
- 230000035922 thirst Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The invention discloses a leading trailing shoe drum brake applying force through trailing shoe giant magnetostictive and a method of the leading trailing shoe drum brake. The leading trailing shoe drum brake comprises a left brake shoe, a left brake piece, a brake wheel cylinder, a brake drum, a right brake piece, a right brake shoe, a reset spring, a right connection piece, a right limiting cover, a right coil fixing cover, an assistor shell, an assistor base, a left coil fixing cover, a left limiting cover, a left connection piece, a left elastic rubber gasket, a left adjusting spacer, a left wire outlet hole, a giant magnetostictive column, an exciting coil, a coil framework, a right wire outlet hole, a right adjusting spacer and a right elastic rubber gasket. According to the leading trailing shoe drum brake applying force through trailing shoe giant magnetostictive and the method of the leading trailing shoe drum brake, to solve the problem that a trailing shoe in a leading trailing shoe brake is low in braking efficiency, the giant magnetostictive column is utilized to conduct braking and force applying on the trailing shoe, so that the overall braking efficiency of the leading trailing shoe drum brake is improved, the braking distance is reduced, and vehicle running safety is improved; besides, the leading trailing shoe drum brake further has the advantages that the drum brake is good in reliability, convenient to use and free of affecting working of an original braking system after reformation is conducted, and a parking braking mechanism is arranged conveniently.
Description
Technical field
The present invention relates to drum brake, more particularly, to a kind of neck afterburning from hoof ultra-magnetic telescopic is from shoe drum brake
And its method.
Background technology
Drum brake is one of modal brake species, on automobile, especially has in Medium or severe type commercial car
Application widely.With respect to disk brake, drum brake has low production cost, shoe brake life-span length, dust-proof anti-
Dirty performance is good, good reliability etc. a little.Meanwhile, have benefited from its own design feature, most of drum brake all carries utilization
The rotation of brake drum voluntarily boosting function, can effectively lift braking effect；In the arrangement of parking braking, also relative to disc type system
The simpler reliability of dynamic device.
In braking procedure, if the frictional force between brake-shoe and brake drum can make brake-shoe press tighter, that is, rub
Wipe moment and there is " growth trend " effect, then this brake-shoe is neck hoof；If moment of friction makes brake-shoe have the trend leaving brake drum,
I.e. moment of friction plays " subtracting gesture " effect, then this brake-shoe is from hoof.Leading trailing shoe brake is modal drum brake knot
Structure, no matter automobile brake in forward travel or state of rolling backward, two brake-shoes of this brake always have one be neck hoof, one
It is from hoof, therefore insensitivity is good, and is easily installed parking and braking mechanism, but due to no matter braking in which kind of state, always
It is to have a brake-shoe to be from hoof, therefore the relatively double neck hoof of braking ability, two-way double neck hoof and boosting-type brake are poor.But
It is that, because two leading shoe brake, boosting-type brake stability are poor, duo two leading shoe brake cannot arrange parking system
Dynamic, therefore leading trailing shoe brake still has a wide range of applications.Increasing with the lifting of current car speed, loading mass
Greatly, people thirst for a kind of neck afterburning from hoof ultra-magnetic telescopic to solve existing neck from hoof system from shoe drum brake and its method
Dynamic device is from the low problem of hoof retardation efficiency.
Content of the invention
A kind of neck afterburning from hoof ultra-magnetic telescopic includes left brake-shoe, left brake(-holder) block, braked wheel from shoe drum brake
Cylinder, brake drum, right brake(-holder) block, right braking hoof, back-moving spring, from hoof ultra-magnetic telescopic assistor, afterburning from hoof ultra-magnetic telescopic
Device includes right connector, right limit lid, lid fixed by right coil, assistor housing, assistor base, left coil fix lid, left limit
Position lid, left connector, left elastic caoutchouc packing ring, left adjusting gasket, left wire hole, ultra-magnetic telescopic post, excitation coil, coil bone
Frame, right wire hole, right adjusting gasket, right elastic caoutchouc packing ring, are fixed by assistor base from hoof ultra-magnetic telescopic assistor
Below inside brake drum, wheel cylinder is fixed on above inside brake drum, and left brake(-holder) block is fixed on left brake-shoe, right braking
Piece is fixed on right braking hoof, and left brake-shoe upper end is connected with wheel cylinder left hand piston, left brake-shoe lower end and left connector
Left end is connected, and right braking hoof upper end is connected with wheel cylinder right hand piston, and right braking hoof lower end is connected with right connector right-hand member, multiple
Position spring one end is connected to top in left brake-shoe, and the back-moving spring other end is connected to top, assistor housing in right braking hoof
It is fixed on assistor base, assistor housing is respectively equipped with left wire hole and right wire hole near the position of left and right end face, surpass
Magnetostriction post is located at assistor housing central authorities, and excitation coil is wrapped on coil rack, and coil rack is located at assistor housing
And ultra-magnetic telescopic post between, the fixing lid of left limit lid, left coil is sequentially connected and via being bolted on assistor housing,
The fixing lid of right limit lid, right coil is sequentially connected and via being bolted on assistor housing, left coil fixes lid, right coil
Two ends about fixing lid difference coil pressing skeleton, left limit lid passes through left elastic caoutchouc packing ring and compresses left connector, right limit
Lid compresses right connector by right elastic caoutchouc packing ring, and left connector right-hand member is via left adjusting gasket and ultra-magnetic telescopic post left end
It is connected, right connector left end is connected with ultra-magnetic telescopic post right-hand member via right adjusting gasket.
Comprise the following steps from hoof reinforcing method from shoe drum brake from the afterburning neck of hoof ultra-magnetic telescopic：
When wheel drives brake drum rotate counterclockwise：
1）Driver's brake pedal, about wheel cylinder, piston promotes left brake-shoe and right braking hoof respectively, drives
Left brake(-holder) block and right brake(-holder) block extruding brake drum；
2）When braking pressure mediumpRise to setting valuePWhen, connect the power supply of excitation coil, and be passed through to excitation coil
Size isIElectric current, and to conventional numbermJudged, whenm=When 1, the sense of current is forward direction, whenm=When 0, the sense of current is anti-
To；
3）Excitation coil after energising produces magnetic field, and ultra-magnetic telescopic post extends under the influence of a magnetic field, due to this
When left brake-shoe be neck hoof, right braking hoof is from hoof, left connector be subject to left brake-shoe lower end thrust to the right be more than right connector
By right braking hoof lower end thrust to the left, therefore ultra-magnetic telescopic post promotes right connector to move right via right adjusting gasket；
4）The right braking hoof lower end that the right connector promotion moving right is connected, thus mitigate as the right braking from hoof
Hoof rotated counterclockwise by wheel affect and produce " subtracting gesture " effect, and then lifted from hoof braking effect；
5）In braking procedure, once braking pressure mediumpLess than setting valueP, cut off the power supply of excitation coil at once；Work as system
Dynamic pressure mediumpReturn to setting valuePWhen, it is again switched on the power supply of excitation coil and by size beI, in direction and step 1
Sense of current identical electric current；
6）After driver loosens the brake, rightmExecution inversion operation；
7）mThe power supply of excitation coil is connected, being passed through size to excitation coil is after negatingkI,k<1 electric current, and to mark
NumbermJudged, whenm=When 1, the sense of current is forward direction, whenm=When 0, the sense of current is reverse, and electric current is lastingtTime, to eliminate
Remanent magnetism, so that ultra-magnetic telescopic post recovers initial length, prepares to brake next time；
Step 2)-step 7) in parameterP、t、kActual conditions according to automobile determine,IFor braking medium real-time pressurepFunction, conventional numbermFor a switching value, for control electric current direction.
When wheel drives brake drum to turn clockwise：
1）Driver's brake pedal, about wheel cylinder, piston promotes left brake-shoe and right braking hoof respectively, drives
Left brake(-holder) block and right brake(-holder) block extruding brake drum；
2）When braking pressure mediumpRise to setting valuePWhen, connect the power supply of excitation coil, and be passed through to excitation coil
Size isIElectric current, and to conventional numbermJudged, whenm=When 1, the sense of current is forward direction, whenm=When 0, the sense of current is anti-
To；
3）Excitation coil after energising produces magnetic field, and ultra-magnetic telescopic post extends under the influence of a magnetic field, due to this
When right braking hoof be neck hoof, left brake-shoe is from hoof, right connector be subject to right braking hoof under extreme direction thrust to the left be more than left company
Fitting is subject to extreme direction thrust to the right under left brake-shoe, and ultra-magnetic telescopic post promotes left connector to moving to left via left adjusting gasket
Dynamic；
4）The left brake-shoe lower end that the left connector promotion being moved to the left is connected, thus mitigate as the left braking from hoof
Hoof rotated clockwise by wheel affect and produce " subtracting gesture " effect, and then lifted from hoof braking effect；
5）In braking procedure, once hydraulic couplingpLess than setting valueP, cut off the power supply of excitation coil at once；When braking medium
PressurepReturn to setting valuePWhen, it is again switched on the power supply of excitation coil and by size beI, electric current side in direction and step 1
To identical electric current；
6）After driver loosens the brake, rightmExecution inversion operation；
7）mThe power supply of excitation coil is connected, being passed through size to excitation coil is after negatingkI,k<1 electric current, and to mark
NumbermJudged, whenm=When 1, the sense of current is forward direction, whenm=When 0, the sense of current is reverse, and electric current is lastingtTime, to eliminate
Remanent magnetism, so that ultra-magnetic telescopic post recovers initial length, prepares to brake next time；
Step 2)-step 7) in parameterP、t、kActual conditions according to automobile determine,IFor braking medium real-time pressurepFunction, conventional numbermFor a switching value, for control electric current direction.
The present invention is directed in neck trailing shoe brake from the low problem of hoof retardation efficiency, using giant magnetostrictive material in magnetic
Can extend under field action and feature that compressive property is good, by ultra-magnetic telescopic post to neck from shoe drum brake from hoof
Carry out reinforcing.No matter vehicle is in forward travel or state of rolling backward, all can be braked reinforcing to from hoof, thus lifting neck
From the integral stop efficiency of shoe drum brake, reduce braking distance, the security that lifting vehicle travels.Additionally, the present invention is also
There is good reliability, easy to use, do not interfere with original brakes work after transformation, be easy to arrange the spies such as parking and braking mechanism
Point.
Brief description
Fig. 1 is from shoe drum brake structural representation from the afterburning neck of hoof ultra-magnetic telescopic；
Fig. 2 is the present invention from hoof ultra-magnetic telescopic assistor structural representation；
Fig. 3 is the present invention from hoof ultra-magnetic telescopic assistor left view；
Fig. 4 is the present invention from hoof ultra-magnetic telescopic assistor top view；
Fig. 5 is the present invention from hoof ultra-magnetic telescopic assistor top view A-A face revolved sectional view；
From the non-working condition of hoof ultra-magnetic telescopic assistor when Fig. 6 brakes in the case of wheel rotate counterclockwise for the present invention
Under force analysis figure；
Fig. 7 be the present invention under wheel rotate counterclockwise situation brake when from hoof ultra-magnetic telescopic assistor working condition
Force analysis figure；
In figure, left brake-shoe 1, left brake(-holder) block 2, wheel cylinder 3, brake drum 4, right brake(-holder) block 5, right braking hoof 6, reset bullet
Spring 7, right connector 8, right limit lid 9, right coil fix lid 10, assistor housing 11, assistor base 12, the fixing lid of left coil
13rd, left limit lid 14, left connector 15, left elastic caoutchouc packing ring 16, left adjusting gasket 17, left wire hole 18, ultra-magnetic telescopic
Post 19, excitation coil 20, coil rack 21, right wire hole 22, right adjusting gasket 23, right elastic caoutchouc packing ring 24.
Specific embodiment
As shown in Fig. 1,2,3,4,5, a kind of neck afterburning from hoof ultra-magnetic telescopic includes left braking from shoe drum brake
Hoof 1, left brake(-holder) block 2, wheel cylinder 3, brake drum 4, right brake(-holder) block 5, right braking hoof 6, back-moving spring 7, from hoof ultra-magnetic telescopic
Assistor, includes right connector 8, right limit lid 9, right coil fixation lid 10, assistor housing from hoof ultra-magnetic telescopic assistor
11st, assistor base 12, left coil fix lid 13, left limit lid 14, left connector 15, left elastic caoutchouc packing ring 16, left regulation
Pad 17, left wire hole 18, ultra-magnetic telescopic post 19, excitation coil 20, coil rack 21, right wire hole 22, right adjusting gasket
23rd, right elastic caoutchouc packing ring 24, is fixed on subordinate in brake drum 4 from hoof ultra-magnetic telescopic assistor by assistor base 12
Side, wheel cylinder 3 is fixed on brake drum 4 inner upper, and left brake(-holder) block 2 is fixed on left brake-shoe 1, and right brake(-holder) block 5 is fixed on
On right braking hoof 6, left brake-shoe 1 upper end is connected with wheel cylinder 3 left hand piston, and left brake-shoe 1 lower end is left with left connector 15
End is connected, and right braking hoof 6 upper end is connected with wheel cylinder 3 right hand piston, and right braking hoof 6 lower end is connected with right connector 8 right-hand member,
Back-moving spring 7 one end is connected to top in left brake-shoe 1, and back-moving spring 7 other end is connected to top in right braking hoof 6, afterburning
Device housing 11 is fixed on assistor base 12, and assistor housing 11 is respectively equipped with left wire hole 18 near the position of left and right end face
With right wire hole 22, ultra-magnetic telescopic post 19 is located at assistor housing 11 central authorities, and excitation coil 20 is wrapped on coil rack 21,
Coil rack 21 is located between assistor housing 11 and ultra-magnetic telescopic post 19, and the fixing lid 13 of left limit lid 14, left coil is sequentially
It is connected and via being bolted on assistor housing 11, the fixing lid 10 of right limit lid 9, right coil is sequentially connected and via bolt
It is fixed on assistor housing 11, left coil fixes lid 13, the fixing lid of right coil 10 coil pressing skeleton 21 about two ends respectively,
Left limit lid 14 compresses left connector 15 by left elastic caoutchouc packing ring 16, and right limit lid 9 is pressed by right elastic caoutchouc packing ring 24
Tightly right connector 8, left connector 15 right-hand member is connected with ultra-magnetic telescopic post 19 left end via left adjusting gasket 17, right connector 8
Left end is connected with ultra-magnetic telescopic post 19 right-hand member via right adjusting gasket 23.
Comprise the following steps from hoof reinforcing method from shoe drum brake from the afterburning neck of hoof ultra-magnetic telescopic：
When wheel drives brake drum 4 rotate counterclockwise：
1）Driver's brake pedal, wheel cylinder 3 about piston promotes left brake-shoe 1 and right braking hoof 6 respectively, band
Move left brake(-holder) block 2 and right brake(-holder) block 5 extruding brake drum 4；As shown in fig. 6, now not yet working from hoof ultra-magnetic telescopic assistor,
Therefore left brake-shoe 1 extrudes the horizontal right direction thrust of left connector 15F, fix lid 13 with assistor housing 11 via left coil
It is supplied to the holding power of the horizontal left direction of left connector 15Fs, ultra-magnetic telescopic post 19 is supplied to a left side via left adjusting gasket 17
The holding power of the horizontal left direction of connector 15Fg, right braking hoof 6 extrudes the horizontal left direction thrust of right connector 8F’, super magnetic
Telescopic mast 19 is caused to be supplied to the holding power of the horizontal right direction of right connector 8 via right adjusting gasket 23Fg’, have with ShiShimonoseki
System：
F
1
=Fs
1
+Fg
1
Fg
1
=Fg
2
F 2 =Fg 2 ；
The elastic force being produced due to left elastic washer 16 and flexible packing ring 24 extrusion is relatively small, and here is not
It is considered.When left brake(-holder) block 2 is identical with right brake(-holder) block 5 cornerite,FGenerally higher than2F’；
2）When braking pressure mediumpRise to setting valuePWhen, connect the power supply of excitation coil 20, and to excitation coil 20
Being passed through size isIElectric current, and to conventional numbermJudged, whenm=When 1, the sense of current is forward direction, whenm=When 0, the sense of current is
Reversely；
3）Excitation coil 20 after energising produces magnetic field, and ultra-magnetic telescopic post 19 extends under the influence of a magnetic field, by
It is neck hoof in now left brake-shoe 1, right braking hoof 6 is from hoof, and by left brake-shoe 1 lower end, thrust to the right is more than left connector 15
Right connector 8 is subject to right braking hoof 6 lower end thrust to the left, and therefore ultra-magnetic telescopic post 19 promotes right company via right adjusting gasket 23
Fitting 8 moves right；As shown in fig. 7, in this case, because all compacted ultra-magnetic telescopic post 19 in two ends extends, therefore
The pressure that ultra-magnetic telescopic post 19 two ends are subject to increases, the counter-force of this pressure at two endsFg 1 WithFg 2 Similarly increase, ifFg 1 WithFg 2
Because ultra-magnetic telescopic post increases, the power increment of generation isΔFg, that is,：
Fg
1
’=Fg
1
+ΔFg
Fg 2 ’=Fg 2 +ΔFg；
Then have：
F
2
’=Fg
2
’=Fg
2
+ΔFg=F
2
+ΔFg；
Due toF 1 Size existsF 2 More than 2 times, and assistor has been afterburning effect, the therefore increment of generationΔFgRelativelyF 1 、F 2 All less, can meetΔ Fg ＜ Fs 1 , then after ultra-magnetic telescopic post 19 elongation, the holding power of left connector is increased, but
It is left connector will not to be lifted off left coil to fix lid 13, thereforeFs’Still exist, and have：
F
1
’=F
1
Fs’=Fs-ΔFg；
Ensure that the braking effect of neck hoof is constant；
4）The power increment that the right connector 8 moving right producesΔFgPromote right braking hoof 6 lower end being connected, thus subtracting
Light being rotated counterclockwise by wheel as the right braking hoof 6 from hoof affects and produces " subtracting gesture " effect, and then lifting is braked from hoof
Effect；
5）In braking procedure, once braking pressure mediumpLess than setting valueP, cut off the power supply of excitation coil 20 at once；When
Braking pressure mediumpReturn to setting valuePWhen, it is again switched on the power supply of excitation coil 20 and by size beI, direction and step
Sense of current identical electric current in 1；I.e. when, in braking procedure, driver actively weakens brake force to setting value, or ABS system moves
When making, it is automatically stopped to the reinforcing from hoof from hoof ultra-magnetic telescopic assistor；When driver increases brake force again to setting value,
Or after ABS system stops release, assistor carries out reinforcing to from hoof again；
6）After driver loosens the brake, rightmExecution inversion operation；
7）mThe power supply of excitation coil 20 is connected, being passed through size to excitation coil 20 is after negatingkI（k<1）Electric current, and
To conventional numbermJudged, whenm=When 1, the sense of current is forward direction, whenm=When 0, the sense of current is reverse, and electric current is lastingtTime,
To eliminate remanent magnetism so that ultra-magnetic telescopic post recovers initial length, prepare to brake next time；
Step 2)-step 7) in parameterP、t、kActual conditions according to automobile determine,IFor braking medium real-time pressurepFunction, conventional numbermFor a switching value, for control electric current direction, brake medium and be generally brake fluid or compressed air, use
In transmission brake force.
When wheel drives brake drum 4 to turn clockwise：
1）Driver's brake pedal, wheel cylinder 3 about piston promotes left brake-shoe 1 and right braking hoof 6 respectively, band
Move left brake(-holder) block 2 and right brake(-holder) block 5 extruding brake drum 4；
2）When braking pressure mediumpRise to setting valuePWhen, connect the power supply of excitation coil 20, and to excitation coil 20
Being passed through size isIElectric current, and to conventional numbermJudged, whenm=When 1, the sense of current is forward direction, whenm=When 0, the sense of current is
Reversely；
3）Excitation coil 20 after energising produces magnetic field, and ultra-magnetic telescopic post 19 extends under the influence of a magnetic field, by
It is neck hoof in now right braking hoof 6, left brake-shoe 1 is from hoof, and by right braking hoof 1 lower end, thrust to the left is more than right connector 8
Left connector 15 is subject to left brake-shoe 1 lower end thrust to the right, and ultra-magnetic telescopic post 19 promotes left connection via left adjusting gasket 17
Part 15 is moved to the left；
4）Left brake-shoe 1 lower end that left connector 15 promotion being moved to the left is connected, thus mitigate as the left side from hoof
Brake-shoe 1 rotated clockwise by wheel affect and produce " subtracting gesture " effect, and then lifted from hoof braking effect；
5）In braking procedure, once braking pressure mediumpLess than setting valueP, cut off the power supply of excitation coil 20 at once；When
Braking pressure mediumpReturn to setting valuePWhen, it is again switched on the power supply of excitation coil 20 and by size beI, direction and step
Sense of current identical electric current in 1；；
6）After driver loosens the brake, rightmExecution inversion operation；
7）mThe power supply of excitation coil 20 is connected, being passed through size to excitation coil 20 is after negatingkI,k<1 electric current, and right
Conventional numbermJudged, whenm=When 1, the sense of current is forward direction, whenm=When 0, the sense of current is reverse, and electric current is lastingtTime, with
Eliminate remanent magnetism so that ultra-magnetic telescopic post recovers initial length, prepare to brake next time；
Step 2)-step 7) in parameterP、t、kActual conditions according to automobile determine,IFor braking medium real-time pressurepFunction, conventional numbermFor a switching value, for control electric current direction, brake medium and be generally brake fluid or compressed air, use
In transmission brake force.
The present invention can carry out reinforcing to from hoof in braking procedure, according to giant magnetostrictive material self character, super magnetic
Cause telescopic mast 19 only under certain precompression, can the higher output carrying out expanding-contracting action and power of efficiency, the present invention
In braking, left connector 15 and right connector 8 compress ultra-magnetic telescopic post from two ends respectively, just provide ultra-magnetic telescopic
The material necessary precompression of work.As long as system just can carry out reinforcing in the case that brake pressure reaches setting value, therefore when
Wheel lock up, during ABS action, due to braking the reduction of pressure medium, assistor also can stop to the reinforcing from hoof, and due to super
The response time of magnetostriction materials is exceedingly fast, typically in Millisecond, thus ensure that the normal work of ABS system.Super mangneto is stretched
The elongation of contracting post 19 is only relevant with axial magnetic field strength, unrelated with magnetic direction, therefore passes through switching valuemControl excitation coil
20 sense of current, and then control magnetic direction so that during each foot brake, the magnetic direction in assistor all with last time phase
Instead, the overshoot causing due to being passed through reversing the current when can be prevented effectively from and eliminate remanent magnetism in step 7 using this control mode
Impact, that is, when ensureing the triggering assistor work of every foot brake, ultra-magnetic telescopic post 19 must be direct elongation, without occur by
First shorten the problem that extends again of Hui Yuanchang in what overshoot remanent magnetism caused it is ensured that from the afterburning reliability of hoof.
Claims (2)
1. a kind of neck afterburning from hoof ultra-magnetic telescopic from shoe drum brake it is characterised in that including left brake-shoe（1）, left system
Moving plate（2）, wheel cylinder（3）, brake drum（4）, right brake(-holder) block（5）, right braking hoof（6）, back-moving spring（7）, from the super mangneto of hoof
Flexible assistor, includes right connector from hoof ultra-magnetic telescopic assistor（8）, right limit lid（9）, the fixing lid of right coil（10）、
Assistor housing（11）, assistor base（12）, the fixing lid of left coil（13）, left limit lid（14）, left connector（15）, left bullet
Property rubber washer（16）, left adjusting gasket（17）, left wire hole（18）, ultra-magnetic telescopic post（19）, excitation coil（20）, coil
Skeleton（21）, right wire hole（22）, right adjusting gasket（23）, right elastic caoutchouc packing ring（24）；From hoof ultra-magnetic telescopic assistor
By assistor base（12）It is fixed on brake drum（4）Lower inside, wheel cylinder（3）It is fixed on brake drum（4）Inner upper,
Left brake(-holder) block（2）It is fixed on left brake-shoe（1）On, right brake(-holder) block（5）It is fixed on right braking hoof（6）On, left brake-shoe（1）Upper end
With wheel cylinder（3）Left hand piston is connected, left brake-shoe（1）Lower end and left connector（15）Left end is connected, right braking hoof（6）On
End and wheel cylinder（3）Right hand piston is connected, right braking hoof（6）Lower end and right connector（8）Right-hand member is connected, back-moving spring（7）
One end is connected to left brake-shoe（1）Middle top, back-moving spring（7）The other end is connected to right braking hoof（6）Middle top, assistor shell
Body（11）It is fixed on assistor base（12）On, assistor housing（11）Position near left and right end face is respectively equipped with left wire hole
（18）With right wire hole（22）, ultra-magnetic telescopic post（19）Positioned at assistor housing（11）Central authorities, excitation coil（20）It is wrapped in
Coil rack（21）On, coil rack（21）Positioned at assistor housing（11）With ultra-magnetic telescopic post（19）Between, left limit lid
（14）, the fixing lid of left coil（13）It is sequentially connected and via being bolted to assistor housing（11）Left end, right limit lid（9）、
The fixing lid of right coil（10）It is sequentially connected and via being bolted to assistor housing（11）Right-hand member, the fixing lid of left coil（13）、
The fixing lid of right coil（10）Coil pressing skeleton respectively（21）Left and right two ends, left limit lid（14）By left elastic caoutchouc packing ring
（16）Compress left connector（15）, right limit lid（9）By right elastic caoutchouc packing ring（24）Compress right connector（8）, left connection
Part（15）Right-hand member is via left adjusting gasket（17）With ultra-magnetic telescopic post（19）Left end is connected, right connector（8）Left end is via the right side
Adjusting gasket（23）With ultra-magnetic telescopic post（19）Right-hand member is connected.
2. a kind of use is afterburning from hoof from shoe drum brake from the afterburning neck of hoof ultra-magnetic telescopic as claimed in claim 1
Method is it is characterised in that comprise the following steps：
When wheel drives brake drum（4）During rotate counterclockwise：
1）Driver's brake pedal, wheel cylinder（3）Left and right piston promotes left brake-shoe respectively（1）And right braking hoof（6）,
Drive left brake(-holder) block（2）With right brake(-holder) block（5）Extruding brake drum（4）；
2）When braking pressure mediumpRise to setting valuePWhen, connect excitation coil（20）Power supply, to excitation coil（20）Logical
Entering size isIElectric current, and to conventional numbermJudged, whenm=When 1, the sense of current is forward direction, whenm=When 0, the sense of current is anti-
To；
3）Excitation coil after energising（20）Produce magnetic field, ultra-magnetic telescopic post（19）Extend under the influence of a magnetic field, by
In now left brake-shoe（1）For leading hoof, right braking hoof（6）It is from hoof, left connector（15）By left brake-shoe（1）Lower end is to the right
Thrust is more than right connector（8）By right braking hoof（6）Lower end thrust to the left, therefore ultra-magnetic telescopic post（19）Via right regulation
Pad（23）Promote right connector（8）Move right；
4）The right connector moving right（8）Promote the right braking hoof being connected（6）Lower end, thus mitigate as the right system from hoof
Dynamic hoof（6）Rotated counterclockwise by wheel affect and produce " subtracting gesture " effect, and then lifted from hoof braking effect；
5）In braking procedure, when braking pressure mediumpLess than setting valuePWhen, cut off excitation coil（20）Power supply；When braking is situated between
Matter pressurepReach setting valuePWhen, it is again switched on excitation coil（20）Power supply and by size beI, direction and step 2）Middle electricity
Stream direction identical electric current；
6）After driver loosens the brake, rightmExecution inversion operation；
7）mExcitation coil is connected after negating（20）Power supply, to excitation coil（20）Being passed through size iskI,k<1 electric current, and right
Conventional numbermJudged, whenm=When 1, the sense of current is forward direction, whenm=When 0, the sense of current is reverse, and electric current is lastingtTime, with
Eliminate remanent magnetism so that ultra-magnetic telescopic post recovers initial length, prepare to brake next time；
Step 2)-step 7) in parameterP、t、kActual conditions according to automobile determine,IFor braking medium real-time pressurepLetter
Number, conventional numbermFor a switching value, for control electric current direction；
When wheel drives brake drum（4）When turning clockwise：
1）Driver's brake pedal, wheel cylinder（3）Left and right piston promotes left brake-shoe respectively（1）And right braking hoof（6）,
Drive left brake(-holder) block（2）With right brake(-holder) block（5）Extruding brake drum（4）；
2）When braking pressure mediumpRise to setting valuePWhen, connect excitation coil（20）Power supply, and to excitation coil（20）
Being passed through size isIElectric current, and to conventional numbermJudged, whenm=When 1, the sense of current is forward direction, whenm=When 0, the sense of current is
Reversely；
3）Excitation coil after energising（20）Produce magnetic field, ultra-magnetic telescopic post（19）Extend under the influence of a magnetic field, by
In now right braking hoof（6）For leading hoof, left brake-shoe（1）It is from hoof, right connector（8）By right braking hoof（6）Lower end is to the left
Thrust is more than left connector（15）By left brake-shoe（1）Lower end thrust to the right, ultra-magnetic telescopic post（19）Via left spacer
Piece（17）Promote left connector（15）It is moved to the left；
4）The left connector being moved to the left（15）Promote the left brake-shoe being connected（1）Lower end, thus mitigate as the left side from hoof
Brake-shoe（1）Rotated clockwise by wheel affect and produce " subtracting gesture " effect, and then lifted from hoof braking effect；
5）In braking procedure, when braking pressure mediumpLess than setting valuePWhen, cut off excitation coil（20）Power supply；When braking is situated between
Matter pressurepReach setting valuePWhen, it is again switched on excitation coil（20）Power supply and by size beI, direction and step 2）Middle electricity
Stream direction identical electric current；
6）After driver loosens the brake, rightmExecution inversion operation；
7）mExcitation coil is connected after negating（20）Power supply, to excitation coil（20）Being passed through size iskI,k<1 electric current, and right
Conventional numbermJudged, whenm=When 1, the sense of current is forward direction, whenm=When 0, the sense of current is reverse, and electric current is lastingtTime, with
Eliminate remanent magnetism so that ultra-magnetic telescopic post recovers initial length, prepare to brake next time；
Step 2)-step 7) in parameterP、t、kActual conditions according to automobile determine,IFor braking medium real-time pressurep's
Function, conventional numbermFor a switching value, for control electric current direction.
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| CN201410785790.9A CN104613103B (en) | 2014-12-18 | 2014-12-18 | Leading trailing shoe drum brake applying force through trailing shoe giant magnetostictive and method thereof |
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| CN201410785790.9A CN104613103B (en) | 2014-12-18 | 2014-12-18 | Leading trailing shoe drum brake applying force through trailing shoe giant magnetostictive and method thereof |
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| CN104613103B true CN104613103B (en) | 2017-02-22 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102017207249A1 (en) * | 2017-04-28 | 2018-10-31 | Aktiebolaget Skf | telescopic column |
| CN107444378B (en) * | 2017-08-16 | 2019-12-31 | 安徽工程大学 | Hybrid brake system |
| CN109372914B (en) * | 2018-12-14 | 2020-06-02 | 福建海工车桥制造有限公司 | Intelligent drum brake device for automobile |
| CN111059178B (en) * | 2019-11-27 | 2021-06-15 | 南京航空航天大学 | Brake device based on magnetostrictive material and control method thereof |
| CN111188853A (en) * | 2020-03-05 | 2020-05-22 | 涡阳县安元汽车配件有限公司 | Automobile brake device |
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