CN201531390U

CN201531390U - Vehicle-use double-piston electronic vacuum pump

Info

Publication number: CN201531390U
Application number: CN2009202690152U
Authority: CN
Inventors: 邬建树
Original assignee: NINGBO TUOPU STEERING SYSTEM CO Ltd
Current assignee: NINGBO TUOPU STEERING SYSTEM CO Ltd
Priority date: 2009-11-06
Filing date: 2009-11-06
Publication date: 2010-07-21
Anticipated expiration: 2019-11-06

Abstract

The utility model relates to a vehicle-use double-piston electronic vacuum pump comprising a number one piston cylinder (1), a number two piston cylinder (2), a motor (3), an eccentric driving shaft (4), a number one piston (5) and a number two piston (6), wherein the motor (3) is positioned at the center position in a piston cylinder body and connected with the bilateral number one piston (5) and number two piston (6) by the eccentric driving shaft (4), and the motor (3) drives the bilateral number one piston (5) and number two piston (6) by the eccentric driving shaft (4); the number one piston (5) and the number two piston (6) are respectively positioned in the inner cavities of the number one piston cylinder (1) and the number two piston cylinder (2); an air outlet (9) is positioned at the middle part of the piston cylinder body and connected with a silencer (10); the two ends of the piston cylinder body are communicated by an air pipeline; and an extract opening (8) is positioned at the middle section of the air pipeline. The double-piston type vacuum pump is firstly applied in vehicles, can be used as an inflator pump after a one-way valve is distributed reversely, and can also be applied in the inflator pump in tools for fast tire-repairing of the vehicles; the moving principle of air suction and exhausting is unique; and by adopting the eccentric driving shaft to drive a piston to move, the piston integrates the one-way valve to apply novel materials in the silencer.

Description

Vehicle double-piston electronic vacuum pump

Technical field

The utility model belongs to field of vacuum, particularly relates to a kind of vehicle double-piston electronic vacuum pump.

Background technique

Riding vehicle braking technology of the prior art all adopts the hydraulic braking mode, the driver is by applying braking force on brake petal, promote the master cylinder inner carrier by push rod and carry out hydraulic transmission, make the wheel cylinder on four wheels brake, because the braking-force ratio that people foot applies is more limited, can't satisfy the retardation pressure requirement of following four wheel cylinders of car load braking situation, so need vacuum booster that pedal is increased power-assisted, there is vacuum in vacuum booster in inside, by valve control atmosphere turnover vacuum booster, make its inner draught head that produces, finally master cylinder is caused power-assisted by push rod.The vacuum source of vacuum booster is generally from two aspects, and the conventional gasoline passenger car relies on the abnormal pipe of engine charge that vacuum source is provided, and diesel-oil vehicle provides vacuum source by near the oil-sealed rotary pump that is installed in the engine belt pulley.

Because automobile emissions standards more and more improve, petrol engine offers the degree of vacuum of vacuum booster will be more and more lower, must make a big impact to braking force, and development along with mixed power and pure electric vehicle, braking system can't obtain normal traditional vacuum source, therefore, the appearance of electronic vacuum pump is exactly a kind of quick Solution to present present situation.

A kind of performance of market demand is more perfect, and pumping speed is fast, and the vacuum pump that degree of vacuum improves remedies above-mentioned defective.

The model utility content

Technical problem to be solved in the utility model provides a kind of vehicle double-piston electronic vacuum pump, is petrol and diesel oil car, hybrid vehicle, pure electric vehicle or special vehicle, and independence or secondary vacuum source are provided, and is used to realize braking system or transmission system function.

The technological scheme that its technical problem that solves the utility model adopts is: a kind of vehicle double-piston electronic vacuum pump is provided, comprise a piston cylinder, No. two piston cylinders, motor, eccentric drive shaft, a piston and No. two pistons, described motor is positioned at the piston/cylinder central position, and connect to drive a symmetrical piston and No. two pistons by eccentric drive shaft, a described piston and No. two pistons lay respectively in piston cylinder and No. two piston cylinder inner chambers; Described relief opening is positioned at the piston/cylinder middle part and connects silencing apparatus; Described piston/cylinder two ends are communicated with by gas piping; Described bleeding point is positioned at the gas piping intermediate section.

A described piston and piston end opposing side respectively have an one-way valve, and described No. two pistons and piston end opposing side respectively have an one-way valve.

On a described piston cylinder and No. two piston cylinders air flow passage is arranged respectively.

Beneficial effect

The utility model double piston type vacuum pump first Application is in vehicle, and the uniqueness of the moving principle of pump drainage fate adopts the motion of eccentric drive shaft driven plunger, the integrated one-way valve of piston, and with application of novel material in silencing apparatus.

Description of drawings

Fig. 1 is the utility model structural drawing

Fig. 2 is the utility model motion principle figure

Embodiment

Below in conjunction with specific embodiment, further set forth the utility model.Should be understood that these embodiments only to be used to the utility model is described and be not used in the restriction scope of the present utility model.Should be understood that in addition those skilled in the art can make various changes or modifications the utility model after the content of having read the utility model instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.

Embodiment 1

A kind of vehicle double-piston electronic vacuum pump, comprise piston cylinder 1, No. two piston cylinders 2, motor 3, eccentric drive shaft 4, a piston 5 and No. two pistons 6, motor 3 is positioned at the piston/cylinder central position, and connect by eccentric drive shaft 4 and to drive

symmetrical pistons

5 and 6, numbers pistons 5 of No. two pistons and No. two pistons 6 and lay respectively in piston cylinder 1 and No. two piston cylinder 2 inner chambers; Relief opening 9 is positioned at the piston/cylinder middle part and connects silencing apparatus 10; The piston/cylinder two ends are communicated with by gas piping; Bleeding point 8 is positioned at the gas piping intermediate section.

Piston 5 and piston end opposing side respectively have 7, No. two pistons 6 of an one-way valve and piston end opposing side that an one-way valve 7 is respectively arranged.

On a piston cylinder 1 and No. two piston cylinders 2 air flow passage is arranged respectively.

When motor 3 runnings, eccentric drive shaft 4 driven plunger are moved, and two pistons are carrying out back and forth movement in the piston cylinder separately, owing to have one-way valve 7 and air conduit in the piston, when there is pressure difference in the piston cylinder internal air pressure owing to piston motion, toward a side piston of live axle direction motion, because the cylinder internal volume becomes big, air pressure descends, one-way valve 7 opposite sides produce draught head, gas is because pressure reduction, one-way valve 7 backed down enter in the piston cylinder, finishes once vacuumizing operating mode; Meanwhile, away from driving axial piston owing to squeeze air, the cylinder internal volume diminishes in an other side, and the one-way valve of finishing behind the gas pressurized head 7 backs down, and gas is introduced pipeline in the piston, is discharged to the driving axocoel subsequently, finishes the exhaust operating mode one time;

When drive shaft turns 180 degree, two pistons are realized exchange function, therefore spend in the journey in drive shaft turns 360, and two pistons are finished pump drainage gas operating mode twice, realize vacuumizing function;

For solving noise problem, increase silencing apparatus 10 at relief opening 9.

Claims

1. vehicle double-piston electronic vacuum pump, comprise a piston cylinder (1), No. two piston cylinders (2), motor (3), eccentric drive shaft (4), a piston (5) and No. two pistons (6), it is characterized in that: described motor (3) is positioned at the piston/cylinder central position, and connect a drive symmetrical piston (5) and No. two pistons (6) by eccentric drive shaft (4), a described piston (5) and No. two pistons (6) lay respectively in a piston cylinder (1) and No. two piston cylinders (2) inner chamber; Described relief opening (9) is positioned at the piston/cylinder middle part and connects silencing apparatus (10); Described piston/cylinder two ends are communicated with by gas piping; Described bleeding point (8) is positioned at the gas piping intermediate section.

2. a kind of vehicle double-piston electronic vacuum pump according to claim 1 is characterized in that: a described piston (5) and piston end opposing side respectively have an one-way valve (7), and described No. two pistons (6) and piston end opposing side respectively have an one-way valve (7).

3. a kind of vehicle double-piston electronic vacuum pump according to claim 1 is characterized in that: on a described piston cylinder (1) and No. two piston cylinders (2) air flow passage is arranged respectively.