CN105485009B - A kind of brake system of car electric vacuum pump - Google Patents

A kind of brake system of car electric vacuum pump Download PDF

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Publication number
CN105485009B
CN105485009B CN201511011574.XA CN201511011574A CN105485009B CN 105485009 B CN105485009 B CN 105485009B CN 201511011574 A CN201511011574 A CN 201511011574A CN 105485009 B CN105485009 B CN 105485009B
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China
Prior art keywords
check valve
blade
cover plate
upper cover
rotor
Prior art date
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CN201511011574.XA
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CN105485009A (en
Inventor
李文惠
柳恩芬
刘文彬
宋巍
孙红旭
王纯龙
汪炳辰
杜鹏
王明
董景光
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Jilin Dongguang Aowei Automobile Brake System Co Ltd
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Jilin Dongguang Aowei Automobile Brake System Co Ltd
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Priority to CN201511011574.XA priority Critical patent/CN105485009B/en
Publication of CN105485009A publication Critical patent/CN105485009A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/02—Arrangements of pumps or compressors, or control devices therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C25/00—Adaptations of pumps for special use of pumps for elastic fluids
    • F04C25/02—Adaptations of pumps for special use of pumps for elastic fluids for producing high vacuum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/20—Rotors

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Rotary Pumps (AREA)

Abstract

The present invention relates to a kind of brake system of car electric vacuum pump, belong to field of automobile brake.Including motor, there are pump assembly, check valve assembly in lower house and upper shell, cam, link assembly is rotated at a high speed using single blade in annular housing, with cam, airtight plate, check valve routing motion formation vacuum chamber.Blade and catch rotor, blade and upper cover plate, the annular cavity wall gap of lower cover formation coordinates, friction will not be produced, heat will not be produced, can be with long time running, reliability is improved, lower noise, pumping and exhaust are carried out simultaneously, and the speed vacuumized is fast, the leakage of gas is reduced, the final vacuum that vavuum pump reaches is improved.

Description

A kind of brake system of car electric vacuum pump
Technical field
The invention belongs to field of automobile brake, applied to electric car or the gasoline car with turbocharged engine braking In system, vacuum source is provided for vacuum boosting braking system.
Background technology
With the progress of automotive engineering, turbocharging technology is widely used in passenger car petrol engine, hence it is evident that The fuel economy and power performance that improve automobile.But turbocharged engine can cause gasoline engines Vacuum degree deficiency, less than the vacuum needed for brakes vacuum booster, causes brake force not enough, the braking peace of influence automobile Full performance.Accordingly, it would be desirable to using electric vacuum pump as secondary vacuum source, when gasoline engines vacuum degree deficiency When, the vacuum source of auxiliary is provided for vacuum booster.In addition, pure electric vehicle instead of petrol engine due to motor, do not have The inlet manifold of petrol engine provides vacuum source, it is necessary to provide vacuum using independent electric vacuum pump for vacuum booster. Therefore, electric vacuum pump is more and more extensive in automobile industry demand.Current electric vacuum pump mainly has three kinds：Vane pump, it is living Fill in pump, diaphragm pump.Wherein, piston pump has the disadvantage that piston and casing wall friction are larger, and is evacuated and is vented as two strokes, efficiency It is poor with endurance quality；Diaphragm pump has the disadvantage that the material capability requirement to diaphragm is higher, it is necessary to using 120 DEG C of high temperature resistant, resistance to low - 40 DEG C of temperature, and can in the case where high-frequency reciprocating moves operating mode reliably working special rubber, cost is higher, and rubber diaphragm is easy Aged deterioration；Vane pump, such as patent " electric vacuum pump for automobile, the patent No.：200910100508.8 ", using high temperature resistant, The graphite rotator and blade of rub resistance, rotor banding movable vane piece rotate when, blade under the influence of centrifugal force with stator inner wall unlubricated friction Contact is wiped, the cavity that volume is continually changing is produced, generation vacuumizes effect, obtains most widely should at present in automobile manufacturing field With, but it has the disadvantage：1 noise is big, especially for electric car, because motor instead of fuel engines, motor The relative noise with fuel engines of noise is substantially reduced, and the operating noise of electric vacuum pump just turns into main vehicle noise source One of, influence driver's ride comfort.Rotor banding movable vane piece rotates at a high speed during 2 vacuum pump work, more than rotating speed 5000rpm, The friction of blade and stator can produce larger frictional force, reduce the efficiency that vavuum pump is vacuumized.3 blades and stator phase mutual friction Substantial amounts of frictional heat can be produced, vavuum pump, which works long hours, can burn motor, reduce the reliability of vacuum pump work.
The content of the invention
The present invention provides a kind of brake system of car electric vacuum pump, so that the noise for solving presently, there are is big, blade with The friction of stator reduces vavuum pump and vacuumizes the problem of efficiency, frictional heat reduce vavuum pump functional reliability.
It is of the invention to be using technical scheme：Including motor, there are pump assembly, unidirectional valve group in lower house and upper shell Part, cam, link assembly；
The pump assembly is made up of upper cover plate, lower cover, sealing ring, rotor, blade, screw, armature spindle, the upper lid Having in the middle of plate has ring-shaped step one on the inside of hole, peritreme, upper cover plate is radially provided with groove, and radial depth is no more than in the assembled condition Rotor periphery, lower cover upper surface is provided with annular groove close to outer rim, and the rectangular seal with gap is arranged in annular groove, lower cover Having in the middle of plate has ring-shaped step two on the inside of hole, lower cover, lower cover is radially provided with stopper slot, and rotor upper and lower end face outer rim has ring Shape step, is interference fitted with armature spindle, forms gap cooperation respectively with upper cover plate ring-shaped step one, lower cover ring-shaped step two, Annular chamber is constituted, rotor periphery is radially provided with T-slot, screwed hole, blade upper surface and upper cover plate are just provided with to T-slot upper surface Gap coordinates, and lower surface coordinates with lower cover sheet separation, and blade radial outer rim coordinates with upper cover plate inwall gap；The upper cover plate exists The both sides of groove circumferencial direction are provided with air inlet duct and outgassing groove, penetrate into upper cover plate cavity inside, with air inlet duct and outgassing groove phase What is connected is the rectangular cavity of width expansion；
The check valve assembly includes air inlet check valve assembly and gas outlet check valve assembly：
The air inlet check valve assembly is fixed on the air inlet duct end of upper cover plate by screw, between check valve body and upper cover plate by Gasket seal is sealed, and intake valve port check valve sheet is installed towards upper cover plate side；
The gas outlet check valve assembly is fixed on the outgassing groove end of upper cover plate, sealing-plug and check valve body outside by screw Plug connects, and gas outlet check valve assembly is distinguished as outlet valve port check valve sheet with air inlet check valve assembly pacifies towards sealing-plug side Dress；
The cam is connected with armature spindle interference fit, and one end is positioned with armature spindle shoulder, cam projection maximum displacement point With blade installation site in a sagittal plane；
The link assembly includes, and connecting rod three is right angle bar, and one end is connected with airtight plate, and corner is hinged with fixed plate, Connecting rod one is right angle bar, and one end is provided with small bearing, and corner is hinged with fixed plate, return spring is connected with the one end of connecting rod two, The other end is fixed on lower cover by fixed plate, and connecting rod abuts the limit of the stopper slot of lower cover in the presence of spring-return power Plane, it is ensured that leave gap with rotor in airtight plate side；
Upper shell is fixedly connected sequentially with upper cover plate, lower cover, lower house, upper shell and lower house formation annular seal space；Electricity Machine is fixedly connected with upper shell, and rotor is fixedly connected with motor, rotor and upper cover plate, lower cover fit clearance.
The airtight plate lower right corner of the present invention is obtuse angle edge.
Annular chamber cross section of the present invention is rectangle, and the axial length of side is 2~3 times of the radial direction length of side.
Blade of the present invention exposes rotor portion 2~3mm of thickness, and side is plane, and opposite side is that multiple wide 2~3mm are straight Groove, straight trough depth is 2nd/1st to three/2nd of vane thickness, groove sidewall thickness is the wide a quarter of straight trough to five/ One, blade outer rim cusp is arc surface with bottom land transition portion.
Gradient is 70 degree to 80 after 20 degree to 30 degree of gradient before projection maximum displacement point of the present invention, maximum displacement point Degree.
Blade afterbody of the present invention is T-shaped body, and blade is fixed by screws in T-slot, and the external edge of T-shaped is matched somebody with somebody with rotor It is the face of cylinder to close part.
Stopper slot of the present invention radially has two width, wide by 0.5 with airtight plate gap mating part in the assembled condition ~1mm, with the wide 2~4mm of gap mating part of connecting rod three.
Intake valve port check valve sheet of the present invention is made up of low temperature resistant ageing-resistant fluosilicic rubber, thickness 0.5~1mm, one Hold as nose cone, be connected with check valve body centre bore.
Air inlet duct and outgassing groove of the present invention respectively apart from 2~3mm of groove, air inlet duct and outlet groove width be 2~ 3mm, highly highly identical with annular chamber, deep 0.5~1mm.
Rectangular cavity width of the present invention is 4~5 times of air inlet well width.
The advantage of the invention is that：
1st, rotated at a high speed in annular housing using single blade, with cam, airtight plate, check valve routing motion formation vacuum Chamber.Blade and catch rotor, blade and upper cover plate, the annular cavity wall gap of lower cover formation coordinate, and will not produce friction, no Heat can be produced, can be improved with long time running, reliability, lower noise.And common vane pump will be produced in high speed rotates Raw substantial amounts of heat, and have frictional vibration noise.
2nd, only one of which blade, the time that the process vacuumized that often rotates a circle is accounted for is more, and is evacuated and is vented simultaneously Carry out, the speed vacuumized is fast.It is less efficient and piston pump, diaphragm pump air inlet and exhaust are two strokes.
3rd, the special shape of blade, reduces the leakage of gas, and the final vacuum that vavuum pump can reach is improved.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is Fig. 1 explosive view；
Fig. 3 is the three-dimensional view of upper cover plate of the present invention；
Fig. 4 is the three-dimensional view of blade of the present invention；
Fig. 5 is the cross section view of blade of the present invention；
Fig. 6 is the partial view of cam of the present invention；
In figure：Motor 1, check valve body 2, upper shell 3, lower house 4, armature spindle 5, spring 6, lower cover 7, sealing ring 8, leaf Piece 9, rotor 10, screw 11, upper cover plate 12, gasket seal 13, intake valve port check valve sheet 14, air inlet 15, screw 16, sealing Plug 17, outlet valve port check valve sheet 18, gas outlet 19, projection 20, cam 21, airtight plate 22, fixed plate 23, nose cone 24, Gu Fixed board 25, bearing 26, rectangular cavity 27, outgassing groove 28, groove 29, straight trough 30, air inlet duct 31, the face of cylinder 32, arc surface 33, connecting rod One 34, connecting rod 2 35, connecting rod 3 36, ring-shaped step 1, obtuse angle edge 38, stopper slot 39, ring-shaped step 2 40, gap 41, ring Shape chamber 42.
Embodiment
Including motor 1, there are pump assembly, check valve assembly, cam 21, link assembly in lower house 4 and upper shell 3；
The pump assembly is by upper cover plate 12, lower cover 7, sealing ring 8, rotor 10, blade 9, screw 11,5 groups of armature spindle Into having in the middle of the upper cover plate 12 has ring-shaped step 1 on the inside of hole, peritreme, the radial direction of upper cover plate 12 is provided with groove 29, radially deep Degree is no more than the outer rim of rotor 10 in the assembled condition, and the upper surface of lower cover 7 is provided with annular groove close to outer rim, and the rectangle with gap is close Seal 8 is arranged in annular groove, and having in the middle of lower cover 7 on the inside of hole, lower cover has ring-shaped step 2 40, and the radial direction of lower cover 7 is provided with Stopper slot 39, the radial direction of stopper slot 39 has two width, in the assembled condition with the wide 0.5~1mm of gap mating part of airtight plate 22, With the wide 2~4mm of gap mating part of connecting rod 3 36, the upper and lower end face outer rim of rotor 10 has ring-shaped step, matched somebody with somebody with the interference of armature spindle 5 Close, forming gap respectively with the ring-shaped step 1 of upper cover plate 12, the ring-shaped step 2 40 of lower cover 7 coordinates, and constitutes annular chamber 42, should The cross section of annular chamber 42 is rectangle, and the axial length of side is 2~3 times of the radial direction length of side, and this square-section can reduce airtight plate 22 Swing angle, makes the time of switching shorter.Ring-shaped step gap, which coordinates, can increase the resistance that gas enters annular chamber 42, improve Efficiency is vacuumized, the outer rim of rotor 10 is radially provided with T-slot, screwed hole is just provided with to T-slot upper surface, the afterbody of blade 9 is T-shaped Body, blade 9 is fixed in T-slot by screw 11, and fills fluid sealant, and the external edge of T-shaped is cylinder with the mating part of rotor 10 Face 32, the upper surface of blade 9 and the gap of upper cover plate 12 coordinate, and lower surface coordinates with the gap of lower cover 7, the radially outer edge of blade 9 with it is upper The inwall gap of cover plate 12 coordinates, and blade 9 exposes the part 2~3mm of thickness of rotor 10, and side is plane, opposite side for it is multiple it is wide by 2~ 3mm straight troughs 30, straight trough depth be the thickness of blade 9 2/1sts to three/2nd, groove sidewall thickness be straight trough 30 it is wide four/ 1/1st to five, the outer rim cusp of blade 9 is arc surface 33 with bottom land transition portion；
The upper cover plate 12 is provided with air inlet duct 31 and outgassing groove 28 in the both sides of the circumferencial direction of groove 29, air inlet duct 31 and goes out Air drain 28 penetrates into the cavity inside of upper cover plate 12 respectively apart from 29 2~3mm of groove, air inlet duct 31 and outgassing groove 28 it is wide be 2 ~3mm, highly highly identical with annular chamber 42, deep 0.5~1mm, what is be connected with air inlet duct 31 and outgassing groove 28 is width expansion Rectangular cavity 27, the width of rectangular cavity 27 is 4~5 times of the width of air inlet duct 31, air inlet duct 31 and the narrower width of outgassing groove 28, so The blade 9 each circulated can be increased and vacuumize effective travel, air inlet duct 31 and the depth of outgassing groove 28 are shallower, the square being attached thereto The width of shape chamber 27 increase, it is possible to reduce the resistance of air inlet and exhaust；
The check valve assembly is divided into air inlet check valve assembly and gas outlet check valve assembly,
Air inlet check valve assembly is fixed on the end of air inlet duct 31 of upper cover plate 12, check valve body 2 and upper cover plate by screw 16 Sealed between 12 by gasket seal 13, intake valve port check valve sheet 14 is made up of low temperature resistant ageing-resistant fluosilicic rubber, thickness 0.5~ 1mm, one end is nose cone 24, is connected with the centre bore of check valve body 2, and intake valve port check valve sheet is pacified towards the side of upper cover plate 12 Dress；
Gas outlet check valve assembly is fixed on by screw 16 outside the end of outgassing groove 28 of upper cover plate 12, sealing-plug and check valve body Side plug connects, and gas outlet check valve assembly is distinguished as outlet valve port check valve sheet 18 towards sealing-plug 17 with air inlet check valve assembly Install side；
The cam 21 is connected with the interference fit of armature spindle 5, and one end is positioned with the shoulder of armature spindle 5, and the projection 20 of cam 21 is most Big displacement point is with the installation site of blade 9 in a sagittal plane；The part that cam 21 is contacted first when rotating with bearing 26 is oblique 20 degree to 30 degree of degree, impacts smaller, and it is 70 degree to 80 degree to have crossed gradient after maximum displacement point, and such airtight plate 22 can be in spring Rapid return in the presence of 6；
The link assembly includes, and connecting rod 3 36 is right angle bar, and one end is connected with airtight plate 22, corner and fixed plate 25 It is hinged, connecting rod 1 is right angle bar, one end is provided with small bearing 26, and corner is hinged with fixed plate 25, return spring 6 and connecting rod The connection of 2 35 one end, the other end are fixed on lower cover 7 by fixed plate 23, and connecting rod is abutted in the presence of the restoring force of spring 6 The confined planes of the stopper slot 39 of lower cover 7, it is ensured that gap 41 is left in the side of airtight plate 22 with rotor 10, the lower right corner of airtight plate 22 is Obtuse angle edge 38, this shape of airtight plate 22 can reduce the angle of the swing of blade 9 in the case where not influenceing sealing, improve Pumping efficiency；
Upper shell 3 and upper cover plate 12, lower cover 7, lower house 4 are fixedly connected sequentially, and upper shell 3 forms close with lower house 4 Seal chamber；
Motor 1 is fixedly connected with upper shell 3, and adjusting position ensures rotor 10 and upper cover plate 12, the fit clearance of lower cover 7, Rotor 10 is set freely to be rotated under the drive of motor 1.
The course of work of the present invention comprises the following steps：
Step 1：Motor rotor driven is rotated, air inlet duct rectangular opening that blade outer rim is inswept, and now airtight plate is in return spring Upper cover plate and the annular chamber square-section of lower cover formation are blocked under effect at groove, blade continues to rotate sweeping annular chamber, The annular chamber volume that sweeping is crossed is increasing, and outside air is by coordinating gap to have little time inside supplement, the annular chamber that sweeping is crossed Vacuum is formed, intake valve port check valve sheet is opened, and air enters from inlet port.Annular chamber volume in front of blade direction of rotation Reduce, air is compressed, outlet valve port check valve sheet is opened, air is discharged from gas outlet.
Step 2：When blade outer rim sweeping crosses outgassing groove rectangular opening, vacuum makes gas outlet in the annular chamber that sweeping is crossed Check valve sheet is closed, and vacuum continues to increase in the annular chamber that sweeping is crossed.When blade is close to airtight plate, cam projection part band Dynamic link assembly, airtight plate is swung rapidly, is that blade opens annular chamber square-section, blade runs through annular chamber rectangle and cut Face.
Step 3：When airtight plate is opened, the air in housing has enters annular chamber from straight trough on a small quantity, now air inlet Valve port check valve sheet is closed, and inlet vacuum degree keeps constant.Blade continues to rotate sweeping, repeat step 1.
It is empty according to fluid mechanics principle because blade outer rim and bottom land transition portion are circular arc during blade sweeping Gas largely flows to blade bottom along circular arc, reduces the leakage of edge air.Further, since blade side is multiple straight Groove, when blade is contacted with gas, the gas of high speed is distributed in each straight trough, is formed small vortex, is consumed the energy of gas, Reduce the gas noise in blade rotary course.
Because the rotating speed of motor is very fast, generally 2000rpm to 5000rpm, the amount of leakage phase in gap in a circulation It is pair minimum with the air capacity proportion that enters from air inlet.Rotating speed is faster, and the vacuum that air inlet can be finally reached is higher, The efficiency of pumping is also faster.

Claims (10)

1. a kind of brake system of car electric vacuum pump, it is characterised in that：Including motor, there is pump in lower house and upper shell Body component, check valve assembly, cam, link assembly；
The pump assembly is made up of upper cover plate, lower cover, sealing ring, rotor, blade, screw, armature spindle, in the upper cover plate Between have a hole, have ring-shaped step one on the inside of peritreme, upper cover plate is radially provided with groove, and radial depth is no more than rotor in the assembled condition Outer rim, lower cover upper surface is provided with annular groove close to outer rim, and the rectangular seal with gap is arranged in annular groove, in lower cover Between have a hole, have ring-shaped step two on the inside of lower cover, lower cover is radially provided with stopper slot, and rotor upper surface and lower surface outer rim have Ring-shaped step, is interference fitted with armature spindle, forms gap respectively with upper cover plate ring-shaped step one, lower cover ring-shaped step two and match somebody with somebody Close, constitute annular chamber, rotor periphery is radially provided with T-slot, is just provided with screwed hole to T-slot upper surface, blade upper surface with it is upper Cover plate gap coordinates, and lower surface coordinates with lower cover sheet separation, and blade radial outer rim coordinates with upper cover plate inwall gap；The upper lid Plate is provided with air inlet duct and outgassing groove in the both sides of groove circumferencial direction, penetrates into upper cover plate cavity inside, with air inlet duct and outlet What groove was connected is the rectangular cavity of width expansion；
The check valve assembly includes air inlet check valve assembly and gas outlet check valve assembly：
The air inlet check valve assembly is fixed on the air inlet duct end of upper cover plate by screw, by sealing between check valve body and upper cover plate Gasket seal, intake valve port check valve sheet is installed towards upper cover plate side；
The gas outlet check valve assembly is fixed on the outgassing groove end of upper cover plate by screw, and sealing-plug on the outside of check valve body with filling in Connect, gas outlet check valve assembly is distinguished as outlet valve port check valve sheet with air inlet check valve assembly pacifies towards sealing-plug side Dress；
The cam is connected with armature spindle interference fit, and one end is positioned with armature spindle shoulder, cam projection maximum displacement point and leaf Piece installation site is in a sagittal plane；
The link assembly includes, and connecting rod three is right angle bar, and one end is connected with airtight plate, and corner is hinged with fixed plate, connecting rod One is right angle bar, and one end is provided with small bearing, and corner is hinged with fixed plate, and return spring is connected with the one end of connecting rod two, another End is fixed on lower cover by fixed plate, and connecting rod two abuts the spacing of the stopper slot of lower cover in the presence of spring-return power Face, it is ensured that leave gap with rotor in airtight plate side；
Upper shell is fixedly connected sequentially with upper cover plate, lower cover, lower house, upper shell and lower house formation annular seal space；Motor with Upper shell is fixedly connected, and rotor is fixedly connected with motor, rotor and upper cover plate, lower cover fit clearance.
2. brake system of car electric vacuum pump according to claim 1, it is characterised in that：The airtight plate lower right corner For obtuse angle edge.
3. brake system of car electric vacuum pump according to claim 1, it is characterised in that：The annular chamber cross section For rectangle, the axial length of side is 2~3 times of the radial direction length of side.
4. brake system of car electric vacuum pump according to claim 1, it is characterised in that：The blade exposes rotor Part 2~3mm of thickness, side is plane, and opposite side is multiple wide 2~3mm straight troughs, straight trough depth be vane thickness 1/2nd to 2/3rds, groove sidewall thickness is the wide a quarter of straight trough to 1/5th, and blade outer rim cusp is with bottom land transition portion Arc surface.
5. brake system of car electric vacuum pump according to claim 1, it is characterised in that：The projection maximum displacement Gradient is 70 degree to 80 degree after 20 degree to 30 degree of gradient before point, maximum displacement point.
6. brake system of car electric vacuum pump according to claim 1, it is characterised in that：The blade afterbody is T Body, blade is fixed by screws in T-slot, and the external edge of T-shaped is the face of cylinder with rotor engagement part.
7. brake system of car electric vacuum pump according to claim 1, it is characterised in that：The stopper slot radially has Two width, in the assembled condition with the airtight plate gap wide 0.5~1mm of mating part, with the gap mating part of connecting rod three it is wide by 2~ 4mm。
8. brake system of car electric vacuum pump according to claim 1, it is characterised in that：The intake valve port is unidirectional Valve block is made up of low temperature resistant ageing-resistant fluosilicic rubber, and 0.5~1mm of thickness, one end is nose cone, intake valve port check valve sheet and list Connected to valve body centre bore.
9. brake system of car electric vacuum pump according to claim 1, it is characterised in that：The air inlet duct and outlet Groove is respectively apart from 2~3mm of groove, and air inlet duct and outlet groove width are 2~3mm, highly highly identical with annular chamber, deep 0.5~ 1mm。
10. brake system of car electric vacuum pump according to claim 1, it is characterised in that：The rectangular cavity width For 4~5 times of air inlet well width.
CN201511011574.XA 2015-12-30 2015-12-30 A kind of brake system of car electric vacuum pump Active CN105485009B (en)

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CN107154702B (en) * 2017-07-12 2023-04-07 湖北二电电气有限公司 High-efficient windage-free motor
CN109406225B (en) * 2018-12-12 2024-04-26 青岛海颐天仪器有限公司 Vacuum sampling pump for collecting smoke and particulate matters in atmosphere

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