CN102556030B

CN102556030B - Multifunctional brake aid

Info

Publication number: CN102556030B
Application number: CN201210041314.7A
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: 2014-01-15
Anticipated expiration: 2032-02-23
Also published as: CN102556030A

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

Multifunctional brake aid

Technical field

The invention belongs to hydraulic braking technical field, be specifically related to a kind of Multifunctional brake aid.

Background technology

Existing construction machinery and equipment, Automobile Transportation brake system often adopts hydraulic braking, as the winch drg of lifting machine, slewing gear brake, mining equipment loader, fork truck, roller, automobile in communications and transportation and aircraft arrestment energy absorber often all adopt the braking of hydraulic pressure form, there are a lot of shortcomings in hydraulic braking, braking procedure speed is slow, brake off easily drags, can cause brake strip and brake wheel waste to increase, the automobile storage that particularly adopts hydraulic pressure form braking is in more shortcoming: 1, Parking Brake is the only rear two-wheeled hand pulling type braking of design often, pull-type mechanism design is inner at wheel hub, driving process is subject to road surface to affect that not only bracing wire damages but also spring leaf and push rod drop in wheel hub, the lighter causes physical damage and traffic jam severe one to cause personal injury.2, often many actions of starting and docking process, first need to remove the loaded down with trivial details process of parking brake, and this process not only easily forgets, and lose time not only but also disperse energy, also can cause increasing mechanical wear and oil plant waste.While 3, often there is Uneven road vehicle automatically move ahead and after the phenomenon of sauntering, easily there is collision traffic accident.4, brake system maintenance difficult, manufacturing cost is high.5, maintenance process easily causes environmental pollution, and air-discharging process is time length but also many people of needs good teamwork not only, and oil gas liquid is discharged and is not only not easy receive but also people is had again to injury, not only loses time but also increase cost.6, driving is if there is indivedual easy sideslips of brake wheel leakage of oil car brakeing process and easily have an accident on express highway, and a wheel brake leakage of oil meeting affects full wheel braking effect, and the lighter's severe one of cannot walking causes traffic accident.7, existing vehicular spare parts is not general, once accessory damages, will arrive sale monopoly subsides buying, and not only time length but also cost are with high.The 8, slopes steering vehicle difficulty that struggles against on winding road particularly on the highway of wind power plant's excavation is too large, is prone to accidents.9, the expeditious measures that do not stop, once occur hand braking malfunctioning, master cylinder is bad, engine breakdown etc. and easily having an accident.10,, without overload brake anti-lock device, braking procedure can cause tire wear amount to increase.11, easily stolen without anti-theft feature.The design of existing drg not science, unsatisfactory, operate loaded down with trivial details, as easy as rolling off a logly break down, maintenance difficult, cost are many, contaminated environment, manufacturing cost are high.

Summary of the invention

The present invention is directed to the above-mentioned technical matters that prior art exists, a kind of Multifunctional brake aid is provided.

Multifunctional brake aid provided by the present invention is by four master unit stacked compositions, and resemblance resembles tower, and concrete structure is as follows:

A: main body 15 is the first level, in layer, offer criss-cross circular channel, in described passage, top, middle part is provided with main piston 38, described 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 described main piston 38 external diameters have two rectangular channels up and down, round section joint ring 36 is installed in top, and tongue fur shape seal ring 37 is installed in below; Described in-channel water square is respectively provided with the piston 20 that direction phase back structure is identical to the left and right, piston radial is processed with a stage, the rectangle annular groove that is processed with two sealing use on external diameter is used for respectively installing round section joint ring 21 and tongue fur seal ring 22, piston center has obstructed counterbore, on piston path end face, be processed with smooth large chamfering for sealing, the left side of left piston is set with the weak left piston pull back spring pull back spring 18 higher than right piston return spring 26 of tensile strength; Top left piston pull back spring 18 and right piston return spring 26 are revolved by two same cup-shaped lid 16 in two chambeies, main body 15 left and right, and locate with snap ring 24 piston inner side; Described two cup-shaped lid 16 be radially processed with an outer step, the radial surface that formation varies in size, large inside offers the counterbore of screw thread in band, the through hole with interior screw thread is inwardly offered in little footpath, in through hole, be processed with the sealing chamfering matching with piston Smooth chamfering, in cup-shaped lid 16 inward turnings, be pressed with seal ring 17; Described master not 15 below counterbore internal rolling is provided with pressure retaining valve assembly 23, left piston and right piston lower horizontal direction have been opened

compensation orifice

39 and 48, the middle part of

compensation orifice

39 and 48 vertical direction be drilled with the electromagnetism needle being communicated with compensation orifice match ， small-bore, small-bore below be installed with the left Electronic Valve 19 of same model in main body; The top of described main body 15 is outwardly, on cocked bead, be drilled with the bolt hole of distribution decile, in main body vertical center line direction upper end, have the through hole that can insert propelling rod 13, on the cylindrical of main body horizontal direction left and right cylinder body, be processed with the male thread matching with cup-shaped lid 16; The stay bearing plate 45 that the main fuel feeding of described 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 described stay bearing plate 45, in through hole, be processed with the rectangular channel that sealing use is installed, on stay bearing plate 45, be drilled with four main oil supplying holes 43, in stay bearing plate 45 left and right, be drilled with Liang Gezuni hole: 41 Ji Youzuni holes 47, Zuo Zuni hole; Quincunx spring leaf 50 is housed below stay bearing plate 45, the spring bearer plate 40 with counterbore is housed above stay bearing plate 45, the below of described spring bearer plate 40 is processed with the circular groove that rectangular seal 42 is set; Instead in the top counterbore of described spring bearer plate 40 fill a flexure strip 46, with stud bolt 49, insert and use setting nut 44 adjustment to fix, pressure retaining valve assembly plays overload protective function;

B: the second level is installed above described main body 15, in layer, be provided with the two suction coil assemblies 12 of " H " shape of interior circular hole, above the circular hole of described pair of suction coil assembly 12, be processed with the annular groove that snap ring 32 use are installed, in the second level upper limb vertical direction, be processed with the bolt hole that the installation vacuum pump of distribution decile is used, below the second level housing, processing one matches and locates the interior counterbore of use with described main body 15 upper end external diameters, above the second level housing, the inner side of bolt hole is drilled with one and connects the aperture that line is used, below the second level inner chamber, put one with the insulation separator 14 of centre hole, the top of described separator 14 is set with the two suction coil assemblies 12 with inner sliding sleeve, the snap ring 32 of two suction coil assemblies 12 use sides of being located thereon is fixing, in the coil endoporus of described pair of suction coil assembly 12, be set with hollow suction iron, it is rear fixing with inhaling iron snap ring 10 that the step of described propelling rod 13 inserts suction iron 11 downwards, below the second level housing flange place be processed with described main body 15 above the tie bolt hole that matches, the second level housing is seated in the top of main body 15 and fixes with bolt,

C: sit and fill a vacuum pump assembly above described the second level, in the left side of vacuum pump housing 27, VM Vacuum Modulator 8 is housed, above described vacuum pump housing 27, center has small through hole, in vacuum pump housing 27 lower edge, be processed with the second level housing above the bolt hole of corresponding distribution decile, on described propelling rod 13, put and fill a leather cup intermediate plate 30, above leather cup intermediate plate 30, use with the leather cup of interior screw thread and press and sit 29 spinning vacuum leather cups 31, in pressure, take the vacuum pump leather cup pull back spring 28 of a heap shape of upside-down mounting, the top, top of described vacuum pump pull back spring 28 is pressed in vacuum pump housing, vacuum pump housing 27 is fixed on the top of the 3rd level together with the vacuum leather cup 31 use bolt parts of below, form the 3rd level, described VM Vacuum Modulator 8 is to press and be fixed on described vacuum pump housing 27 with hold-down nut 56, on the external diameter right side of the regulator body 53 of described VM Vacuum Modulator 8, be processed with step, left side is processed with male thread, inner axis direction is processed small one and large one through hole, the smooth chamfering that has a sealing use between macropore and aperture, in hole, slide and fill a double acting vacuum piston 55, described vacuum piston 55 is radially processed with rectangle annular groove, be used for installing seal ring, the right of vacuum piston 55 be processed with main body endoporus in the chamfering of the sealing use that matches of chamfering, vacuum piston 55 offers inclined hole up and down, the axial counterbore of screw thread in vacuum piston 55 right side processing belt, a sealing valve block 59 is installed on the step of the left side of counterbore, described sealing valve block 59 use valve block springs 60 withstand, described valve block spring 60 the right screw fixing with counternut 61, on the vacuum piston 55Shang left side, be processed with the hole of seat to the right of vacuum piston pull back spring 54, the left end of described vacuum piston pull back spring 54 screws to regulate with regulator shell 52 and fixes, the below midway location of described regulator shell 52 is drilled with the screw hole of interior screw thread, according to vehicle, can select spring degree by screwing, adjust suitable rear fixing by lock screw 57, the regulator shell 52 left side 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 described vacuum pump housing 27 and is always shaped as the 4th level, contactless switch cover 1 is the bowl-type of back-off, above the 3rd level housing, middle is laid a lower contact with outer stage and interior counterbore and is sat crosslegged 5, 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 fill hollow lower contact dish 6, propelling rod 13 inserts from bottom to top; Propelling rod 13 lays upper end the upper contact of a contact-carrying and sits crosslegged 3, the Shi Huang hole that makes progress, upper contact 3 the center of sitting crosslegged, the outer stage of top processing, on upper contact is sat crosslegged 3 outer stage, be provided with lower little large 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 use screws 7 of sitting crosslegged, the leaded hole of right side opening of described contactless switch cover 1.

The Multifunctional brake aid that the present invention proposes has solved the problem of maintenance difficult, and before and after the design by two chambeies, left and right has solved, wheel braking is adjusted loaded down with trivial details problem, reduces parking and braking mechanism in wheel hub.Avoid, because indivedual wheel leakage of oils have influence on safety traffic, reducing the pollution of braking fluid to environment.Avoid the traffic accident because forgetting that handle braking causes.Alleviate chaufeur labour intensity, the raising sense of security of travelling on various roads, does not produce the race phenomenon of automatically sauntering, and can not cause the traffic accident of full car brakeless because main car engine fault or gross vehicle brake system break down.That Multifunctional brake aid provided by the present invention has is rational in infrastructure, safe and reliable, easy for installation, tooling cost is low, the feature of long service life.

Accompanying drawing explanation

Fig. 1 is Multifunctional brake aid structural representation 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 supporting plate structure schematic diagram.

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

Fig. 6 is the structural representation of elastic plate.

In figure: 1: contactless switch cover; 2: 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: two suction coil housings; 10: inhale iron snap ring; 11: inhale iron; 12: two suction coil assemblies; 13: propelling rod; 14: separator; 15: criss-cross main body; 16: cup-shaped lid; 17: seal ring; 18: left piston pull back spring; 19: left Electronic Valve; 20: left piston; 21: " O " shape seal ring; 22: tongue fur shape seal ring; 23: pressure retaining valve assembly; 24: piston limit snap ring; 25: right cup-shaped lid; 26: right piston return spring; 27: vacuum pump housing; 28: leather cup pull back spring; 29: leather cup is pressed and sat; 30: leather cup clamping plate; 31: vacuum leather cup; 32: fixing snap ring; 33: double wired conductor; 34: erecting frame; 35: main piston snap ring; 36: main piston round section joint ring; 37: main piston ligulate seal ring; 38: main piston; 39: left compensation orifice; 40: spring bearer plate; 41: Zuo Zuni hole; 42: rectangular seal; 43: main oil supplying hole; 44: setting nut; 45: stay bearing plate; 46: flexure strip; 47: You Zuni hole; 48: right compensation orifice; 49: stud bolt; 50: quincunx flexure strip; 51: counterbore plug screw; 52: regulator shell; 53: regulator body; 54: vacuum piston pull back spring; 55: vacuum piston; 56: hold-down nut; 57: lock screw; 58: decompression valve block; 59: sealing valve block; 60: 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;-": represent working oil flow direction.

The specific embodiment

A kind of Multifunctional brake aid provided by the present invention, main body ground floor is criss-cross passage, three pistons and a pressurizer are installed respectively in passage, wherein top, middle part is provided with main piston, below is provided with pressure retaining valve assembly, left and right is separately installed with left piston and right piston, withstand with pull back spring on the left side of left piston, the left side of spring is fixed by cup-shaped lid, work fluid leads to front clutch release slave cylinder, also withstand with spring on the right of right piston, a little less than the elastic force of the elastic force Zhi Bi left side spring of this spring a bit, to guarantee right chamber, lead to the work of rear wheel brake pump in advance, the right of spring is also fixed by cup-shaped lid.Work fluid leads to rear clutch release slave cylinder.The upper left right below of main body is provided with two electromagnetic valves of same model.The total member of two suction coils of the second level is installed above main body.Above the second level housing, seat is equipped with the vacuum pump assembly of the 3rd level again, 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.Above the middle part of main piston, be fixed with long propelling rod, the bottom of long propelling rod is processed into semicircle and is fixed on main piston with clamp.Two suction coil of propelling rod middle part suit.Fixing vacuum pump leather cup above coil, the upper end of propelling rod is inserted in 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 pressure retaining valve in accompanying drawing 2 is used is fixed in the below stage of main body 15 by counterbore plug screw 51 spinning, open-minded in the middle of stay bearing plate 45, in through hole, be processed with the rectangular channel that sealing use is installed, on stay bearing plate, be drilled with four oil supplying holes 43, left and right is drilled with two compensation orifices, quincunx spring leaf 50 is housed below stay bearing plate, top is with the spring bearer plate 40 of 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 fill a flexure strip 46, with stud bolt 49, insert and use setting nut 44 to adjust and fix.This total member plays overload protective function.

VM Vacuum Modulator assembly 8 in accompanying drawing 3 is to press and be fixed on true air device housing 27 with hold-down nut 56, on the external diameter right side of VM Vacuum Modulator main body 53, be processed with step, left side is processed with male thread, inner axis direction is processed small one and large one through hole, the smooth chamfering that has a sealing use between macropore and aperture, in hole, slide and fill a two-way ram 55, piston radial is processed with rectangle annular groove, be used for installing seal ring, the right of piston be processed with main body endoporus in the chamfering of the sealing use that matches of chamfering, piston offers inclined hole up and down.The axial counterbore of screw thread in the processing belt of piston right side, at the upper left sealing valve block 59 of the left side of counterbore step, valve block the right is stayed with spring 60 tops, and spring the right screws 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 screw to regulate with regulator shell 52 and fix, the below midway location of regulator shell 52 is drilled with the screw hole of interior screw thread, according to vehicle, can select spring degree by screwing, suitable rear fixing with screw 57.The regulator shell 52 left side 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 propelling rod upper end promotes contactless switch upper contact and takes the disconnection of Hang， contact.When engine off back pressure bar 13 is when the effect lower disc 59 of spring 28 is opened releasing vacuum power automatically, together with main piston, to inhale iron descending, the point that gets an electric shock engages, power-assisted coil electricity strengthens inhaling the descending strength of iron, promote main piston, in main body, first oil pressure rising promotes the external start of right hand piston, if the right and left brake system generation oil leakage fault, on piston, seal chamfering joint oil circuit and be cut off, other work system still can be worked.

Anti-theft function is played in K3 switch housed joint in accompanying drawing 1, and K2 connects conventional key, and K1 makes emergency switch.The brake aid that the present invention proposes has solved the problem of maintenance difficult, and before and after the design by two chambeies, left and right has solved, wheel braking is adjusted loaded down with trivial details process, reduces parking and braking mechanism in wheel hub.Avoid, because indivedual wheel leakage of oils have influence on safety traffic, reducing the pollution of braking fluid to environment.Avoid the traffic accident because forgetting that handle drg causes.Alleviate chaufeur labour intensity, the raising sense of security of travelling on various roads, does not produce the race phenomenon of automatically sauntering, and can not cause the traffic accident of full car brakeless because main car engine fault or gross vehicle brake system break down.

Claims

1. multifunctional brake aid, is characterized in that this assistive device is by four master unit stacked compositions, and concrete structure is as follows:

a: main body (15) is the first level, in layer, offer criss-cross circular channel, in described passage, top, middle part is provided with main piston (38), described 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 described main piston (38) external diameter has two rectangular channels up and down, round section joint ring (36) is installed in top, and tongue fur shape seal ring (37) is installed in below; Described in-channel water square is respectively provided with the piston (20) that direction phase back structure is identical to the left and right, piston radial is processed with a stage, the rectangle annular groove that is processed with two sealing use on external diameter is used for respectively installing round section joint ring (21) and tongue fur seal ring (22), piston center has obstructed counterbore, on piston path end face, be processed with smooth large chamfering for sealing, the left side of left piston is set with tensile strength a little more than the left piston pull back spring (18) of right piston return spring (26); Top left piston pull back spring (18) and right piston return spring (26) are revolved by two same cup-shaped lid (16) in two chambeies, main body (15) left and right, and locate with snap ring (24) piston inner side; Described two cup-shaped lid (16) be radially processed with an outer step, the radial surface that formation varies in size, large inside offers the counterbore of screw thread in band, the through hole with interior screw thread is inwardly offered in little footpath, in through hole, be processed with the sealing chamfering matching with piston Smooth chamfering, in cup-shaped lid (16) inward turning, be pressed with seal ring (17); The below counterbore internal rolling of described main body (15) is provided with pressure retaining valve assembly (23), left piston and right piston lower horizontal direction have been opened compensation orifice (39,48), in the middle part vertical direction of compensation orifice (39,48), being drilled with the electromagnetism needle being communicated with compensation orifice matches and is installed with the left Electronic Valve (19) of same model in the below main body of ， small-bore, small-bore; The top of described main body (15) is outwardly, on cocked bead, be drilled with the bolt hole of distribution decile, in main body vertical center line direction upper end, have the through hole that can insert propelling rod (13), on the cylindrical of main body horizontal direction left and right cylinder body, be processed with the male thread matching with cup-shaped lid (16); The stay bearing plate (45) that the main fuel feeding of described pressure retaining valve assembly (23) is used is fixed in the below step of main body (15) by counterbore plug screw (51) spinning, in the middle of described stay bearing plate (45), open through hole, in the through hole of described stay bearing plate (45), be processed with the rectangular channel that sealing use is installed, on stay bearing plate (45), be drilled with four main oil supplying holes (43), in stay bearing plate (45) left and right, be drilled with Liang Gezuni hole: Ji Youzuni hole, Zuo Zuni hole (41) (47); In the below of stay bearing plate (45), quincunx spring leaf (50) is housed, the spring bearer plate (40) with counterbore is housed in the top of stay bearing plate (45), the below of described spring bearer plate (40) is processed with the circular groove that rectangular seal (42) are set; The anti-flexure strip (46) that fills in the top counterbore of described spring bearer plate (40), inserts and uses setting nut (44) adjustment to fix with stud bolt (49), and pressure retaining valve assembly plays overload protective function;

b: the top in described main body (15) is provided with the second level, in layer, be provided with the two suction coil assemblies (12) of " H " shape of interior circular hole, circular hole top at described pair of suction coil assembly (12) is processed with the annular groove that snap ring (32) use is installed, in the second level upper limb vertical direction, be processed with the bolt hole that the installation vacuum pump of distribution decile is used, below the second level housing, processing one matches and locates the interior counterbore of use with described main body (15) upper end external diameter, above the second level housing, the inner side of bolt hole is drilled with one and connects the aperture that line is used, below the second level inner chamber, put one with the insulation separator (14) of centre hole, the top of described separator (14) is set with the two suction coil assemblies (12) with inner sliding sleeve, two suction coil assemblies (12) are fixing with the snap ring (32) of the side of being located thereon, in the coil endoporus of described pair of suction coil assembly (12), be set with hollow suction iron, the step of described propelling rod (13) is fixed with inhaling iron snap ring (10) after inserting downwards and inhaling iron (11), below the second level housing, flange place is processed with the tie bolt hole matching with described main body (15) top, and the second level housing is seated in the top of main body (15) and fixes with bolt,

c: sit and fill a vacuum pump assembly above described the second level, in the left side of vacuum pump housing (27), VM Vacuum Modulator (8) is housed, center, top at described vacuum pump housing (27) has small through hole, is processed with the bolt hole with the second corresponding distribution decile in level housing top in vacuum pump housing (27) lower edge, on described propelling rod (13), put and fill a leather cup intermediate plate (30), in the top of leather cup intermediate plate (30), use with the leather cup of interior screw thread and press and sit (29) spinning vacuum leather cup (31), in pressure, take the vacuum pump leather cup pull back spring (28) of a heap shape of upside-down mounting, the top, top of described vacuum pump pull back spring (28) is pressed in 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, form the 3rd level, described VM Vacuum Modulator (8) is to press and be fixed on described vacuum pump housing (27) with hold-down nut (56), on the external diameter right side of the regulator body (53) of described VM Vacuum Modulator (8), be processed with step, left side is processed with male thread, inner axis direction is processed small one and large one through hole, the smooth chamfering that has a sealing use between macropore and aperture, the sliding double acting vacuum piston (55) that fills in hole, described vacuum piston (55) is radially processed with rectangle annular groove, be used for installing seal ring, the right of vacuum piston (55) be processed with main body endoporus in the chamfering of the sealing use that matches of chamfering, vacuum piston (55) offers inclined hole up and down, the axial counterbore of screw thread in the processing belt of vacuum piston (55) right side, a sealing valve block (59) is installed on the step of the left side of counterbore, described sealing valve block (59) withstands with valve block spring (60), described valve block spring (60) the right screws fixing with counternut (61), on the upper left side of vacuum piston (55), be processed with the hole of seat to the right of vacuum piston pull back spring (54), the regulator shell for left end (52) of described vacuum piston pull back spring (54) screws to regulate and fixes, the below midway location of described regulator shell (52) is drilled with the screw hole of interior screw thread, according to vehicle, can select spring degree by screwing, adjust suitable rear fixing by lock 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,

d: in the top of described vacuum pump housing (27), a contactless switch is set and is always shaped as the 4th level, contactless switch cover (1) is the bowl-type of back-off, above the 3rd level housing, a lower contact with outer stage and interior counterbore sit crosslegged (5) is laid in middle, 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, at lower contact, sit crosslegged in (5) inner step and tightly fill hollow lower contact dish (6), 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 sit crosslegged center, lower surface of (3) of upper contact is provided with the region between the heart and the diaphragm hole, the outer stage of top processing, in the outer stage of (3) of sitting crosslegged at upper contact, lower little large heap shape upper contact holddown spring (2) is installed, the contactless switch cover for top (1) of upper contact holddown spring (2) is to pressing down, contact bowl cover (1) together with lower contact sit crosslegged (5) with screw (7), be fixed at the 3rd layer of vacuum pump housing (27) upper, the leaded hole of right side opening of described contactless switch cover (1).