CN206158972U - Diaphragm formula electric vacuum pump's for automobile mechanism of advancing to exhaust - Google Patents

Abstract

The utility model belongs to the automobile brake booster system field especially relates to a diaphragm formula electric vacuum pump's for automobile mechanism of advancing to exhaust. The utility model discloses a diaphragm formula electric vacuum pump's for automobile mechanism of advancing to exhaust, including the motor and the pump body, seted up air inlet and exhaust duct on the pump body, end cover subassembly about both ends department is provided with about the pump body when rotating stop department, when the inside shape chamber of diaphragm is the biggest, is in the state of bleeding, and the inside shape chamber of diaphragm is the negative pressure, produces suction, and that opposition piston assembly is in shape chamber volume is minimum, is exhaust state, be provided with on the pump body with dabber complex balancing piece. The beneficial effects of the utility model are that: the performance of bleeding is better, and factor of safety is higher, and life is longer, and accumulative total operating time can reach more than 1200 hours.

Description

The intake and exhaust mechanism of diaphragm type electric vacuum pump for automobile

Technical field

The utility model belongs to automobile brake force aid system field, more particularly to a kind of diaphragm type electric vacuum pump for automobile Intake and exhaust mechanism.

Background technology

With the reduction of non-renewable resources, Abgasgesetz is increasingly strict, energy-saving and emission-reduction, and environmental protection is today's society Active demand.The development of new-energy automobile will be solve discharge Main way, the gas handling system that conventional truck passes through engine To reach the vacuum level requirements of vacuum booster, and new-energy automobile without engine, braking automobile vacuum booster lacks vacuum Power source, brakes cisco unity malfunction.It is therefore desirable to one kind is independent of engine power, and can in good time provide the dress of vacuum source Put.There is problems with existing electric vacuum pump：1. safety coefficient is low, once a damage parts, whole force aid system for braking Failure；2. temperature rise, because inner body is dry friction, in the case of running up, temperature is raised comparatively fast, and impact uses the longevity Life；3. poor sealing performance, it is contemplated that the graphite powder after dry friction discharges the pump housing, gas outlet must towards little, without waterproof measure, To being provided with strict demand.

The content of the invention

The purpose of this utility model is to solve the problems, such as techniques discussed above, there is provided a kind of pumping performance is more preferably, safe Coefficient is higher, and service life is longer, and cumulative operation time can reach the diaphragm type electric vacuum pump for automobile of more than 1200 hours Intake and exhaust mechanism, its technical scheme is as follows：

The intake and exhaust mechanism of diaphragm type electric vacuum pump for automobile, including motor and the pump housing, it is characterised in that described pump Entering and exhaust channel is offered on body, left and right end-cap assembly is provided with the left and right two ends of the pump housing, left and right end-cap assembly is internally provided with Suction muffler and discharge chamber, entering and exhaust channel is respectively communicated with the suction muffler of left and right end-cap assembly, and discharge chamber, left and right end-cap assembly includes side Plate, check valve, side plate is provided with two groups of holes, two groups of holes respectively with suction muffler, discharge chamber communicates, and check valve control suction and discharge are unidirectional Gas flow；To being equipped with piston component at the left and right two ends of the entering and exhaust channel of the pump housing, piston component by diaphragm, metal insert and Piston rod is constituted, and the outer ring of diaphragm is pressed on the pump housing by side plate, and bearing is pressed with one end of piston rod, and bearing is connected with band-offset The output shaft of the mandrel in heart hole, mandrel and motor is in interference fit, mandrel eccentric rotary under the driving of motor, band piston group Part is moved back and forth；Elastic deformation movement is carried out under the pulling of piston rod inside diaphragm, when turning at stop, inside diaphragm When shape chamber is maximum, in pumping state, the shape chamber inside diaphragm is negative pressure, produces suction, and opposed pistons component is in shape chamber Volume is minimum, is exhaust condition；The balance weight coordinated with mandrel is provided with the pump housing.

Preferred embodiment is that described diaphragm is integrated using vulcanization with metal insert synthesis.So that piston component knot Structure is simple, and assembling is reliable, and operating efficiency is high, and processing is easily implemented, and machining accuracy is high, and production efficiency is fast, and quality level is high, energy Realize that equipment automatization assembly technology is produced, assemble the fast function of beat.

Preferred embodiment is, at the upper end of described mandrel lower seam is offered, and seam, balance weight are offered on balance weight When being fitted on mandrel, upper seam and the matching of lower seam are combined.So that the assembly precision between mandrel and balance weight is high, uniformity It is good, quick assembling and error-disable function can be realized.

Preferred embodiment is that round-corner transition groove is provided with the described pump housing, and side plate compresses the outer ring of diaphragm on the pump housing, It is in low friction trace movement that the inner ring of diaphragm has part to be arranged in round-corner transition groove with groove.Avoid diaphragm root to be cut The risk of shear force, reduces the friction of diaphragm and groove and cuts off stress, improves the service life of diaphragm.

The intake and exhaust of the diaphragm type electric vacuum pump for automobile diaphragm type electric vacuum pump for automobile that the utility model is provided Mechanism, piston component is that both sides are opposed, and the piston component of side is evacuated, and opposite side piston component is exhausted simultaneously, takes out (row) strength obtains asymmetric cylinder compensation, and low energy consumption, operation balance, vibration is low, and twin-tub work, rate of air sucked in required is big.If wherein one lives Plug assembly breaks down, and does not affect the normal work of whole system.

Motor carries out interference fit with mandrel by rotation stop wedge structure, and the mandrel other end press-fits balance weight, piston component Rotated around electrical axis balance by mandrel, solve the dynamic equilibrium problems of piston component eccentric rotary；

Motor has O-ring seal with pump housing faying face, and left and right end-cap assembly is provided with O-ring seal with pump housing mounting surface, can Effectively prevent dust, rainwater from entering interiors of products, degree of protection reaches IP67.

Motor is connected with the VEU of automobile, and when VEU monitors the insufficient pressure of vacuum tank, starting motor carries out pumping work Make, make the negative pressure in vacuum tank remain that the vacuum of middle force aid system requirement is interval interior.

The beneficial effects of the utility model are：More preferably, safety coefficient is higher, and service life is longer for pumping performance, adds up work More than 1200 hours are can reach as the time.

Description of the drawings

Fig. 1 is diaphragm type electric vacuum pump for automobile schematic diagram；

Fig. 2 is the cut-away view of diaphragm type electric vacuum pump for automobile；

Fig. 3 is left and right end-cap assembly schematic diagram；

Fig. 4 is piston component schematic diagram；

Fig. 5 is the cut-away view of piston component；

Fig. 6 is outlet port cap assemblies schematic diagram；

Fig. 7 is mandrel and balance weight assembling schematic diagram；

Fig. 8 is the enlarged diagram of round-corner transition groove；

Specific embodiment

With reference to Fig. 1 to Fig. 8 specific illustrative embodiments：

Diaphragm type electric vacuum pump for automobile, including motor 1, the pump housing 4, left and right end-cap assembly 2, piston component 3, band is eccentric The mandrel 5 in hole, the balance weight 6 coordinated with mandrel 5, the outlet port cap assemblies 7 with check valve Yu sound-absorbing sponge.Left and right end cap group The inside shape chamber of part 2 is divided into suction muffler 24 and discharge chamber 25, and the pump housing 4 is provided with entering and exhaust channel 41, is respectively communicated with left and right end-cap assembly Suction muffler 24, discharge chamber 25, side plate 23 be provided with two groups of holes 26,27 respectively with suction muffler 24, discharge chamber 25 communicates, 22 points of check valve Not in the unidirectional gas flow of control suction and discharge；2 opposite disposed piston components 3 combine metal by diaphragm 31 with vulcanization Inserts 32, in metallic piston bar 34 bearing 33 is pressed with, then is connected by mandrel 5, and mandrel 5 was in the output shaft of motor 1 It is full of cooperation, the eccentric rotary under the driving of motor 1 of mandrel 5, band piston component 3 is moved back and forth；Outlet port cap assemblies 7 and the pump housing 4 mounting surfaces are provided with sealing gasket 71 and carry out waterproof, and end cap 72 forms first-level buffer chamber 77 and level 2 buffering chamber 78 with shield 75, one End cap check valve 73 is provided with level cushion chamber, there is sound-absorbing sponge 74, the entering and exhaust channel 41 that gas passes through the pump housing 4 in level 2 buffering chamber It is discharged into outside product by steam vent 76 again.

This product operation principle：The output shaft of motor 1 drives mandrel 5 to carry out eccentric rotary, and then drives piston rod 34 around electricity The center of machine 1 carries out circumference movement, and balance weight 6 guarantees that rotation center of gravity is consistent with motor output shaft, reaches steady operating.Outside diaphragm 31 Circle is pressed on the pump housing 4 by side plate 23, and elastic deformation movement is carried out under the pulling of piston rod 34 inside diaphragm 31, when turning to It is negative pressure inside shape chamber 35 in pumping state when the shape chamber 35 inside diaphragm 31 is maximum at stop, produces suction, and it is opposed Piston component is minimum in shape chamber volume, is exhaust condition, and no pressure in shape chamber takes out (row) strength and obtains asymmetric cylinder compensation, low Energy consumption.Under pumping state, check valve 22 is opened, and suction muffler 24 is communicated by hole 26 with the shape chamber 35 inside diaphragm 31, single Close to valve 22, discharge chamber 25 is in blocking state with hole 27；Under exhaust condition, check valve 22 is opened, and discharge chamber 25 passes through Hole 27 communicates with the shape chamber 35 inside diaphragm 31, and check valve 22 is closed, and suction muffler is in blocking state with hole 26.Suction muffler 24 passes through The air flue of the pump housing 4 is communicated with force aid system for braking vacuum tank, and discharge chamber 25 enters into pump body by entering and exhaust channel 41.In air pressure Bottom end cover check valve 73 is opened, and gas is discharged in first-level buffer chamber of the end cap 72 with the composition of shield 75 by steam vent 76, then After sound-absorbing sponge 74 in level 2 buffering chamber absorbs, the external world is finally discharged into.End cap check valve 73 prevents extraneous water simultaneously Enter in pump.

Lower seam 51 is offered at the upper end of described mandrel 5, seam 61 is offered on balance weight 6, balance weight press-fits When on mandrel, upper seam and the matching of lower seam are combined.

Be provided with round-corner transition groove 42 on the described pump housing 4, side plate compresses the outer ring of diaphragm on the pump housing, diaphragm it is interior It is in low friction trace movement that circle has part to be arranged in round-corner transition groove with groove.

The each fitting surface of this product is equipped with seal, it is ensured that reliable sealing, reaches degree of protection IP67；Due to opposed Layout diaphragm, running balance, noise is low, without friction, the fast characteristic of the speed of exhaust.Reliable service life can ensure that and normally use Under, car load travels more than 220,000 kilometers fault-frees.

Claims (4)

1. the intake and exhaust mechanism of diaphragm type electric vacuum pump for automobile, including motor and the pump housing, it is characterised in that the described pump housing On offer entering and exhaust channel, left and right end-cap assembly is provided with the left and right two ends of the pump housing, left and right end-cap assembly is internally provided with suction Air cavity and discharge chamber, entering and exhaust channel is respectively communicated with the suction muffler of left and right end-cap assembly, and discharge chamber, left and right end-cap assembly includes side Plate, check valve, side plate is provided with two groups of holes, two groups of holes respectively with suction muffler, discharge chamber communicates, and check valve control suction and discharge are unidirectional Gas flow；To being equipped with piston component at the left and right two ends of the entering and exhaust channel of the pump housing, piston component is by diaphragm, metal insert and work Stopper rod is constituted, and the outer ring of diaphragm is pressed on the pump housing by side plate, and bearing is pressed with one end of piston rod, and it is eccentric that bearing is connected with band The mandrel in hole, mandrel is in interference fit with the output shaft of motor, and mandrel eccentric rotary under the driving of motor drives piston component Move back and forth；Elastic deformation movement is carried out under the pulling of piston rod inside diaphragm, when turning at stop, the shape inside diaphragm When chamber is maximum, in pumping state, the shape chamber inside diaphragm is negative pressure, produces suction, and opposed pistons component holds in shape chamber Product is minimum, is exhaust condition；The balance weight coordinated with mandrel is provided with the pump housing.

2. the intake and exhaust mechanism of diaphragm type electric vacuum pump for automobile as claimed in claim 1, it is characterised in that described film Piece is integrated using vulcanization with metal insert synthesis.

3. the intake and exhaust mechanism of diaphragm type electric vacuum pump for automobile as claimed in claim 1, it is characterised in that described core Lower seam is offered at the upper end of axle, seam is offered on balance weight, when balance weight is fitted on mandrel, upper seam and it is lower only Mouth matching is combined.

4. the intake and exhaust mechanism of diaphragm type electric vacuum pump for automobile as claimed in claim 1, it is characterised in that described pump Round-corner transition groove is provided with body, side plate compresses the outer ring of diaphragm on the pump housing, the inner ring of diaphragm has part to be arranged at fillet With groove in low friction trace movement in transition groove.