CN102556030A

CN102556030A - Multifunctional brake aid

Info

Publication number: CN102556030A
Application number: CN2012100413147A
Authority: CN
Inventors: 许翊像
Original assignee: China MCC17 Group Co Ltd
Current assignee: China Metallurgical Industry Co Ltd
Priority date: 2012-02-23
Filing date: 2012-02-23
Publication date: 2012-07-11
Anticipated expiration: 2032-02-23
Also published as: CN102556030B

Abstract

The invention provides a multifunctional brake aid, which belongs to the technical field of hydraulic brake. The brake aid is formed by overlaying four main parts, a body is provided with a first-layer cross passage, three pistons and a pressure retaining device are mounted in the passage, the main piston is mounted in the upper middle of the passage, a pressure retaining valve assembly is mounted on the lower portion of the passage, and the left piston and the right piston are mounted on the left and the right of the passage. A second-layer double-attraction coil assembly is mounted above the body, a third-layer vacuum device assembly is mounted above a second-layer casing, a vacuum adjustor assembly is mounted on the left of a shell of a vacuum device, and a fourth-layer contactor assembly is mounted above the vacuum device. A long thrust rod is fixed to the upper middle of the main piston, and the upper end of the thrust rod is inserted into the contactor to drive an upper contact. The multifunctional brake aid has the advantages of reasonable structure, safety and reliability in use, convenience in mounting, low in processing cost and long in service life.

Description

Multi-functional braking assistive device

Technical field

The invention belongs to the hydraulic braking technical field, be specifically related to a kind of multi-functional braking assistive device.

Background technology

Existing construction machinery and equipment, vehicular transport brake system often adopt hydraulic braking; Winch drg, slewing gear brake like lifting machine; Automobile in industrial and mineral equipment loader, fork truck, roller, the communications and transportation and aircraft arrestment energy absorber often all adopt the braking of hydraulic pressure form, and there are a lot of shortcomings in hydraulic braking, and braking procedure speed is slow; Brake off drags easily; Can cause brake strip and brake wheel waste to increase, particularly adopt the automobile of hydraulic pressure form braking to have more shortcoming: 1, often only design back two-wheeled hand pulling type braking of Parking Brake, pull-type mechanism design is inner at wheel hub; The driving process receives the road surface to influence that not only backguy damages but also spring leaf and push rod drop in wheel hub, and the lighter causes physical damage and traffic jam weight person to cause personal injury.2, often many actions of starting and docking process at first need be removed the loaded down with trivial details process of parking brake, and this process not only forgets easily, and lose time not only but also disperse energy, and also can cause increasing mechanical wear and oil plant wastes.3, when often Uneven road taking place vehicle move ahead automatically and after the phenomenon of sauntering, the collision traffic accident appears easily.4, brake system maintenance difficult, manufacturing cost is high.5, maintenance process causes environmental pollution easily, and emptying gas process is long but also many people of needs good teamwork of time not only, and oil gas liquid is discharged and not only is not easy to receive but also the people is had injury again, not only loses time but also increase cost.6, if indivedual easy sideslip of brake wheel leakage of oil car brakeing process and be prone to have an accident, a wheel brake leakage of oil meeting influences full wheel braking effect on express highway in driving, and the lighter weight person that can't walk causes traffic accident.7, existing vehicular spare parts is not general, will arrive sale monopoly subsides buying once accessory damages, and not only time length but also cost are with height.8, struggle against winding road on the slope on particularly on the highway of wind power plant excavation the steering vehicle difficulty too big, be prone to accidents.9, the expeditious measures that do not stop, once occur hand braking malfunctioning, master cylinder is bad, engine breakdown or the like and be prone to have an accident.10, do not have the overload brake anti-lock device, braking procedure can cause the tire wear amount to increase.11, no anti-theft feature is stolen easily.Science, unsatisfactory, operation loaded down with trivial detailsly, as easy as rolling off a log do not break down, maintenance difficult, cost are many in the design of existing drg, contaminated environment, manufacturing cost height.

Summary of the invention

The present invention is directed to the above-mentioned technical matters that prior art exists, a kind of multi-functional braking assistive device is provided.

Multi-functional braking assistive device provided by the present invention is by four master unit range upon range of compositions, and resemblance resembles tower, and concrete structure is following:

A: main body 15 is first level, offers the criss-cross circular channel in the layer, and the top, middle part is equipped with main piston 38 in the said passage; Said main piston 38 central upper offer spherical counterbore downwards half; Above counterbore, have annular groove, bulb one end of bulb propelling rod 13 is fixed with snap ring 32 after inserting counterbore, and said main piston 38 external diameters have two rectangular channels up and down; Round section joint ring 36 is installed in the top, and tongue fur shape seal ring 37 is installed in the below; Said in-channel water square respectively is equipped with the identical piston 20 of direction phase back structure to the left and right; Piston radial is processed with a stage; The rectangle annular groove that is processed with two sealing usefulness on the external diameter is used for installing round section joint ring 21 and tongue fur seal ring 22 respectively; Centre has obstructed counterbore, is processed with sealing on the piston path end face with smooth big chamfering, and the left side of left piston is set with the left piston pull back spring pull back spring 18 that is higher than right piston return spring 26 a little less than the tensile strength; Top left piston pull back spring 18 and right piston return spring 26 are revolved with two same cup-shaped lid 16 in main body about 15 two chambeies, and piston is inboard with snap ring 24 location; Said two cup-shaped lid 16 radially be processed with an outer step; The radial surface that formation varies in size; Big inside offers the counterbore of screw thread in the band; The through hole of screw thread in little footpath is inwardly offered and had is processed with in through hole and the piston glazing sealing chamfering that the angle is complementary that slips, and is pressed with seal ring 17 in cup-shaped lid 16 inward turnings; Said master not 15 below counterbore internal rolling is equipped with pressure retaining valve assembly 23; Left piston and right piston lower horizontal direction have been opened

compensation orifice

39 and 48; Vertical direction is drilled with the electromagnetism needle that is communicated with the compensation orifice small-bore that is complementary at the middle part of

compensation orifice

39 and 48, on main body below the small-bore, is installed with the left ELEC Electronic Valve 19 of same model; Outwards protrude the top of said main body 15; On cocked bead, be drilled with the bolt hole of distribution five equilibrium; Have the through hole that can insert propelling rod 13 in main body vertical center line direction upper end, on the cylindrical of main body horizontal direction left and right sides cylinder body, be processed with the male thread that is complementary with cup-shaped lid 16; The stay bearing plate 45 that the main fuel feeding of said pressure retaining valve assembly 23 is used is fixed in the below step of main body 15 by counterbore plug screw 51 spinning; Open-minded in the middle of the said stay bearing plate 45; In through hole, be processed with the rectangular channel that sealing usefulness is installed; On stay bearing plate 45, be drilled with four main oil supplying holes 43, be drilled with two resistance mud holes: resistance mud hole, a left side 41 and right resistance mud hole 47 at stay bearing plate about 45; Quincunx spring leaf 50 is housed below stay bearing plate 45, the spring bearer plate 40 of band counterbore is housed above stay bearing plate 45, the below of said spring bearer plate 40 is processed with the circular groove that rectangular seal 42 is set; Instead in the top counterbore of said spring bearer plate 40 adorn a flexure strip 46, insert and fix with setting nut 44 adjustment with stud bolt 49, the pressure retaining valve assembly plays overload protective function;

B: second level is installed above said main body 15; " H " shape double suction line of force circle assembly 12 of circular hole in being provided with in the layer; Above the circular hole of said double suction line of force circle assembly 12, be processed with the annular groove that snap ring 32 usefulness are installed; Be processed with the bolt hole that the installation vacuum pump of distribution five equilibrium is used in the second level upper limb vertical direction; One of processing is complementary with said main body 15 upper end external diameters and locatees the interior counterbore of usefulness below the second level housing; The inboard of bolt hole is drilled with one and connects the aperture that line is used above the second level housing, below the second level inner chamber, puts the insulation separator 14 of a band centre hole, and the top of said separator 14 is set with the double suction line of force circle assembly 12 of band inner sliding sleeve; It is fixing that double suction line of force circle assembly 12 usefulness are positioned at the snap ring 32 of its top, in the coil endoporus of said double suction line of force circle assembly 12, is set with hollow suction iron; The step of said propelling rod 13 is fixed with inhaling iron snap ring 10 after inserting downwards and inhaling iron 11; Flange place below the second level housing be processed with said main body 15 above the tie bolt hole that is complementary, the second level housing is seated in the top of main body 15 and uses bolt;

C: above said second level, sit and adorn a vacuum pump assembly; In the left side of vacuum pump housing 27 VM Vacuum Modulator 8 is housed; The center has small through hole above said vacuum pump housing 27, be processed with on vacuum pump housing 27 lower edge with the second level housing above the bolt hole of corresponding distribution five equilibrium; On said propelling rod 13, put and adorn a leather cup intermediate plate 30; Above leather cup intermediate plate 30, press seat 29 spinning vacuum leather cups 31 with the leather cup of screw thread in having; Take vacuum pump leather cup pull back spring 28 of piling shape of upside-down mounting in pressure, the top roof pressure of said vacuum pump pull back spring 28 is in the vacuum pump housing; Vacuum pump housing 27 is fixed on the top of the 3rd level together with the vacuum leather cup 31 usefulness bolt parts of below, forms the 3rd level; Said VM Vacuum Modulator 8 is to press with hold-down nut 56 to be fixed on the said vacuum pump housing 27; Be processed with step on the external diameter right side of the regulator body 53 of said VM Vacuum Modulator 8, the left side is processed with male thread, and inner axis direction is processed small one and large one through hole; The smooth chamfering that one sealing usefulness is arranged between macropore and the aperture; In the hole, slide and adorn a double acting vacuum piston 55, said vacuum piston 55 radially is processed with the rectangle annular groove, is used for installing seal ring; The right of vacuum piston 55 be processed with the main body endoporus in the chamfering of the sealing usefulness that is complementary of chamfering; Vacuum piston 55 offers inclined hole up and down, and the axial counterbore of screw thread in the vacuum piston 55 right side processing belt is installed a sealing valve block 59 on the step of the left side of counterbore; Said sealing valve block 59 usefulness valve block springs 60 withstand, and said valve block spring 60 the right are screwed fixing with counternut 61; The left side is processed with the hole of seat to the right of vacuum piston pull back spring 54 on vacuum piston 55; The left end of said vacuum piston pull back spring 54 is screwed to regulate with regulator shell 52 and is fixed; The screw hole of screw thread in the below midway location of said regulator shell 52 is drilled with can be selected the spring elasticity through screwing according to vehicle, and it is fixing with lock screw 57 to adjust suitable back; The left side of regulator shell 52 has inner via hole and male thread, utilizes male thread to be connected with engine air inlet tube;

D a: contactless switch is set above said vacuum pump housing 27 always is shaped as the 4th level; Contactless switch cover 1 is the bowl-type of back-off; Above the 3rd level housing middle lay one have outside the lower contact of stage and interior counterbore sit crosslegged 5, the hole is opened at lower contact 5 the center of sitting crosslegged, sit crosslegged 5 right side of lower contact has the lead-in wire aperture of horizontal direction; In lower contact is sat crosslegged 5 inner steps, tightly adorn hollow lower contact dish 6, propelling rod 13 inserts from bottom to top; The upper end of propelling rod 13 is laid the upper contact of a contact-carrying and is sat crosslegged 3; Upper contact 3 the center of sitting crosslegged upwards is the region between the heart and the diaphragm hole; The outer stage of top processing, on upper contact is sat crosslegged 3 outer stage, be equipped with time little big heap shape upper contact holddown spring 2, the top of upper contact holddown spring 2 with contactless switch cover 1 to pressing down; Contact bowl cover 1 is fixed on the 3rd layer of vacuum pump housing 27 together with the lower contact 5 usefulness screws 7 of sitting crosslegged, and the right side of said contactless switch cover 1 has fairlead.

The multi-functional braking assistive device that the present invention proposes has solved the problem of maintenance difficult, through about the design in two chambeies solved before and after the loaded down with trivial details problem of wheel brake adjusting, reduce parking and braking mechanism in the wheel hub.Avoid because of the individual wheels leakage of oil has influence on safety traffic, reduce of the pollution of braking fluid environment.Avoid traffic accident because of forgetting that the handle braking causes.Alleviate chaufeur labour intensity, the raising sense of security of on various roads, going does not produce the race phenomenon of sauntering automatically, can not cause the traffic accident of full car brakeless because of main car engine fault or gross vehicle brake system break down.That multi-functional braking assistive device provided by the present invention has is rational in infrastructure, safe and reliable, easy for installation, tooling cost is low, the characteristics of long service life.

Description of drawings

Fig. 1 is a multi-functional braking assistant structure scheme drawing proposed by the invention.

Fig. 2 is the structural representation of pressure retaining valve assembly.

Fig. 3 is the structural representation of VM Vacuum Modulator.

Fig. 4 is the supporting plate structure scheme drawing.

Fig. 5 is the structural representation of quincunx flexure strip.

Fig. 6 is the structural representation of elastic plate.

Among the figure: 1: the contactless switch cover; 2: the upper contact holddown spring; 3: upper contact is sat crosslegged; 4: upper contact; 5: lower contact is sat crosslegged; 6: lower contact; 7: screw; 8: VM Vacuum Modulator; 9: double suction line of force circle housing; 10: inhale the iron snap ring; 11: inhale iron; 12: double suction line of force circle assembly; 13: propelling rod; 14: separator; 15: the criss-cross main body; 16: cup-shaped lid; 17: seal ring; 18: the left piston pull back spring; 19: left ELEC Electronic Valve; 20: left piston; 21: " O " shape seal ring; 22: tongue fur shape seal ring; 23: the pressure retaining valve assembly; 24: the spacing snap ring of piston; 25: right cup-shaped lid; 26: right piston return spring; 27: the vacuum pump housing; 28: the leather cup pull back spring; 29: leather cup is pressed and is sat; 30: the leather cup clamping plate; 31: the vacuum leather cup; 32: fixing snap ring; 33: double wired conductor; 34: erecting frame; 35: the main piston snap ring; 36: the main piston round section joint ring; 37: main piston ligulate seal ring; 38: main piston; 39: left compensation orifice; 40: spring bearer plate; 41: resistance mud hole, a left side; 42: rectangular seal; 43: main oil supplying hole; 44: setting nut; 45: stay bearing plate; 46: flexure strip; 47: right resistance mud hole; 48: right compensation orifice; 49: stud bolt; 50: quincunx flexure strip; 51: the counterbore plug screw; 52: regulator shell; 53: regulator body; 54: the vacuum piston pull back spring; 55: vacuum piston; 56: hold-down nut; 57: lock screw; 58: the decompression valve block; 59: the sealing valve block; 60: the valve block spring; 61: counternut; 62: rectangular seal; "-": negative power supply; "+": cathode power supply; K1: one-level switch; K2: secondary switch; K3: housed joint switch; R: fuse;-": expression power fluid flow direction.

The specific embodiment

A kind of multi-functional braking assistive device provided by the present invention, the main body ground floor is the criss-cross passage, and three pistons and a pressurizer are installed respectively in the passage; Wherein middle part top is equipped with main piston, and the below is equipped with the pressure retaining valve assembly, about be separately installed with left piston and right piston; Withstand with pull back spring on the left side of left piston, and the left side of spring is fixed with cup-shaped lid, and work fluid leads to preceding clutch release slave cylinder; Also withstand with spring on the right of right piston; The elastic force of this spring only than a little less than the elastic force of left side spring a bit, lead to back wheel brake pump work in advance to guarantee right chamber, the right of spring is also fixed with cup-shaped lid.Work fluid leads to the back clutch release slave cylinder.The below is equipped with two electromagnetic valves of same model in about on the main body.The total member of double suction line of force circle of second level is installed above main body.Seat is equipped with the vacuum pump assembly of the 3rd level again above the second level housing, and the total member of VM Vacuum Modulator is housed in the left side of vacuum pump housing.Above vacuum pump, refill the 4th level contactless switch assembly.Upper fixed has long propelling rod at the middle part of main piston, and the bottom of long propelling rod is processed into semicircle and is fixed on the main piston with clamp.A double suction line of force of propelling rod middle part suit circle.At the upper fixed vacuum pump leather cup of coil, the upper end of propelling rod is inserted in the contactless switch and is used for driving upper contact.

The stay bearing plate 45 that the main fuel feeding of the total member 23 of the pressure retaining valve in the accompanying drawing 2 is used is fixed on the below stage of main body 15 by counterbore plug screw 51 spinning; Open-minded in the middle of the stay bearing plate 45, in through hole, be processed with the rectangular channel that sealing usefulness is installed, on stay bearing plate, be drilled with four oil supplying holes 43; About be drilled with two compensation orifices; Quincunx spring leaf 50 is housed below stay bearing plate, the spring bearer plate 40 of top band counterbore, the below of spring bearer plate 40 is processed with the circular groove of seal ring 42; Instead in the top counterbore of spring bearer plate 40 adorn a flexure strip 46, insert and fix with setting nut 44 adjustment with stud bolt 49.This total member plays overload protective function.

VM Vacuum Modulator assembly 8 in the accompanying drawing 3 is to press with hold-down nut 56 to be fixed on the vacuum gas device housing 27; Be processed with step on the external diameter right side of VM Vacuum Modulator main body 53, the left side is processed with male thread, and inner axis direction is processed small one and large one through hole; The smooth chamfering that one sealing usefulness is arranged between macropore and the aperture; In the hole, slide and adorn a two-way ram 55, piston radial is processed with the rectangle annular groove, is used for installing seal ring; The right of piston be processed with the main body endoporus in the chamfering of the sealing usefulness that is complementary of chamfering, piston offers inclined hole up and down.The axial counterbore of screw thread in the processing belt of piston right side, left side sealing valve block 59 on the step of the left side of counterbore, valve block the right is stayed with spring 60 tops, and spring the right is screwed fixing with plug screw 61.The also hole of seat to the right of processed springs 54, the left side on piston; Spring 54 left ends are screwed to regulate with regulator shell 52 and are fixed; The screw hole of screw thread in the below midway location of regulator shell 52 is drilled with can be selected the spring elasticity through screwing according to vehicle, and suitable back is fixing with screw 57.The left side of regulator shell 52 has inner via hole and male thread, utilizes male thread to be connected with engine air inlet tube.There is negative pressure in air inlet pipe when engine operation, and inhalation-activated piston 55 left lateral, and piston the right sealing surface is opened; Air inlet pipe and vacuum air chamber communicate; Effect propelling rod at vacuum power is up together with main piston, suction iron, and the propelling rod upper end promotes the contactless switch upper contact and takes row, contact open.When propelling rod behind the engine off 13 the effect lower disc 59 of spring 28 open automatically remove vacuum power in, together with main piston, to inhale iron descending, the point that gets an electric shock engages; The power-assisted coil electricity strengthens inhaling the descending strength of iron; Promote main piston, the oil pressure rising at first promotes the external start of right hand piston in the main body, if the right and left brake system generation oil leakage fault; Piston back seal chamfering engages oil circuit and is cut off, and other work system still can be worked.

The antitheft effect is played in K3 switch housed joint in the accompanying drawing 1, and K2 connects key commonly used, and K1 makes emergency switch.The braking assistive device that the present invention proposes has solved the problem of maintenance difficult, through about the design in two chambeies solved before and after the loaded down with trivial details process of wheel brake adjusting, reduce parking and braking mechanism in the wheel hub.Avoid because of the individual wheels leakage of oil has influence on safety traffic, reduce of the pollution of braking fluid environment.Avoid traffic accident because of forgetting that the handle drg causes.Alleviate chaufeur labour intensity, the raising sense of security of on various roads, going does not produce the race phenomenon of sauntering automatically, can not cause the traffic accident of full car brakeless because of main car engine fault or gross vehicle brake system break down.

Claims

1. multi-functional braking assistive device is characterized in that this assistive device by four master unit range upon range of compositions, and concrete structure is following:

A: main body (15) is first level, offers the criss-cross circular channel in the layer, and the top, middle part is equipped with main piston (38) in the said passage; Said main piston (38) central upper offers spherical counterbore downwards half; Above counterbore, have annular groove, bulb one end of bulb propelling rod (13) is fixed with snap ring (32) after inserting counterbore, and said main piston (38) external diameter has two rectangular channels up and down; Round section joint ring (36) is installed in the top, and tongue fur shape seal ring (37) is installed in the below; Said in-channel water square respectively is equipped with the identical piston (20) of direction phase back structure to the left and right; Piston radial is processed with a stage; The rectangle annular groove that is processed with two sealing usefulness on the external diameter is used for installing round section joint ring (21) and tongue fur seal ring (22) respectively; Centre has obstructed counterbore; Be processed with sealing on the piston path end face with smooth big chamfering, the left side of left piston is set with the left piston pull back spring pull back spring (18) that is higher than right piston return spring (26) a little less than the tensile strength; Top left piston pull back spring (18) and right piston return spring (26) are revolved with two same cup-shaped lid (16) in two chambeies about main body (15), and piston is inboard locatees with snap ring (24); Said two cup-shaped lid (16) radially be processed with an outer step; The radial surface that formation varies in size; Big inside offers the counterbore of screw thread in the band; The through hole of screw thread in little footpath is inwardly offered and had is processed with in through hole and the piston glazing sealing chamfering that the angle is complementary that slips, and is pressed with seal ring (17) in cup-shaped lid (16) inward turning; The below counterbore internal rolling that said master stops (15) is equipped with pressure retaining valve assembly (23); Left piston and right piston lower horizontal direction have been opened compensation orifice (39) and (48); Middle part vertical direction in compensation orifice (39) and (48) is drilled with the electromagnetism needle that is communicated with the compensation orifice small-bore that is complementary, and on main body below the small-bore, is installed with the left ELEC Electronic Valve (19) of same model; Outwards protrude the top of said main body 15; On cocked bead, be drilled with the bolt hole of distribution five equilibrium; Have the through hole that can insert propelling rod (13) in main body vertical center line direction upper end, on the cylindrical of main body horizontal direction left and right sides cylinder body, be processed with the male thread that is complementary with cup-shaped lid (16); The stay bearing plate (45) that the main fuel feeding of said pressure retaining valve assembly (23) is used is fixed in the below step of main body (15) by counterbore plug screw (51) spinning; Open-minded in the middle of the said stay bearing plate (45); In through hole, be processed with the rectangular channel that sealing usefulness is installed; On stay bearing plate (45), be drilled with four main oil supplying holes (43), about stay bearing plate (45), be drilled with two resistance mud holes: resistance mud hole (41), a left side and right resistance mud hole (47); In the below of stay bearing plate (45) quincunx spring leaf (50) is housed, the spring bearer plate (40) of band counterbore is housed in the top of stay bearing plate (45), the below of said spring bearer plate (40) is processed with the circular groove that rectangular seal (42) are set; The anti-flexure strip (46) of adorning in the top counterbore of said spring bearer plate (40), with stud bolt (49) insertion and fixing with setting nut (44) adjustment, the pressure retaining valve assembly plays overload protective function;

B: the top in said main body (15) is equipped with second level; " H " shape double suction line of force circle assembly (12) of circular hole in being provided with in the layer; Circular hole top at said double suction line of force circle assembly (12) is processed with the annular groove that snap ring (32) usefulness is installed; Be processed with the bolt hole that the installation vacuum pump of distribution five equilibrium is used in the second level upper limb vertical direction; One of processing is complementary with said main body (15) upper end external diameter and locatees the interior counterbore of usefulness below the second level housing; The inboard of bolt hole is drilled with one and connects the aperture that line is used above the second level housing, below the second level inner chamber, puts the insulation separator (14) of a band centre hole, and the top of said separator (14) is set with the double suction line of force circle assembly (12) of band inner sliding sleeve; Double suction line of force circle assembly (12) is fixing with the snap ring (32) that is positioned at its top, in the coil endoporus of said double suction line of force circle assembly (12), is set with hollow suction iron; The step of said propelling rod (13) is fixed with inhaling iron snap ring (10) after inserting downwards and inhaling iron (11); The flange place is processed with the tie bolt hole that is complementary with said main body (15) top below the second level housing, and the second level housing is seated in the top of main body (15) and uses bolt;

C: above said second level, sit and adorn a vacuum pump assembly; In the left side of vacuum pump housing (27) VM Vacuum Modulator (8) is housed; Center, top at said vacuum pump housing (27) has small through hole, on vacuum pump housing (27) lower edge, is processed with the bolt hole with the corresponding distribution five equilibrium in second level housing top; On said propelling rod (13), put and adorn a leather cup intermediate plate (30); Seat (29) spinning vacuum leather cup (31) is pressed with the leather cup of screw thread in having in top at leather cup intermediate plate (30); Take vacuum pump leather cup pull back spring (28) of piling shape of upside-down mounting in pressure, the top roof pressure of said vacuum pump pull back spring (28) is in the vacuum pump housing; Vacuum pump housing (27) is fixed on the top of the 3rd level together with the vacuum leather cup (31) of below with bolt part, forms the 3rd level; Said VM Vacuum Modulator (8) is to press with hold-down nut (56) to be fixed on the said vacuum pump housing (27); Be processed with step on the external diameter right side of the regulator body (53) of said VM Vacuum Modulator (8), the left side is processed with male thread, and inner axis direction is processed small one and large one through hole; The smooth chamfering that one sealing usefulness is arranged between macropore and the aperture; In the hole, slide and adorn a double acting vacuum piston (55), said vacuum piston (55) radially is processed with the rectangle annular groove, is used for installing seal ring; The right of vacuum piston (55) be processed with the main body endoporus in the chamfering of the sealing usefulness that is complementary of chamfering; Vacuum piston (55) offers inclined hole up and down, and the axial counterbore of screw thread in the processing belt of vacuum piston (55) right side is installed a sealing valve block (59) on the step of the left side of counterbore; Said sealing valve block (59) withstands with valve block spring (60), and said valve block spring (60) the right is screwed fixing with counternut (61); Be processed with the hole of seat to the right of vacuum piston pull back spring (54) on the last left side of vacuum piston (55); The left end of said vacuum piston pull back spring (54) is screwed to regulate with regulator shell (52) and is fixed; The screw hole of screw thread in the below midway location of said regulator shell (52) is drilled with; Can select the spring elasticity through screwing according to vehicle; It is fixing with lock screw (57) to adjust suitable back, and the left side of regulator shell (52) has inner via hole and male thread, utilizes male thread to be connected with engine air inlet tube;

D: in the top of said vacuum pump housing (27) contactless switch is set and always is shaped as the 4th level; Contactless switch cover (1) is the bowl-type of back-off; Above the 3rd level housing middle lay one have outside the lower contact of stage and interior counterbore sit crosslegged (5); The hole is opened at the lower contact center of (5) of sitting crosslegged; The sit crosslegged right side of (5) of lower contact has the lead-in wire aperture of horizontal direction, tightly adorns hollow lower contact dish (6) in (5) inner step of sitting crosslegged at lower contact, and propelling rod (13) inserts from bottom to top; The upper contact that a contact-carrying is laid in the upper end of propelling rod (13) sit crosslegged (3); The upper contact center of (3) of sitting crosslegged upwards is the region between the heart and the diaphragm hole; The outer stage of top processing; The little down big heap shape upper contact holddown spring (2) of is installed on the outer stage of (3) of sitting crosslegged at upper contact; The top of upper contact holddown spring (2) with contactless switch cover (1) to pressing down, contact bowl cover (1) together with lower contact sit crosslegged (5) be fixed on the 3rd layer of vacuum pump housing (27) with screw (7), the right side of said contactless switch cover (1) has fairlead.