CN204472781U - A kind of electric vacuum pump - Google Patents
A kind of electric vacuum pump Download PDFInfo
- Publication number
- CN204472781U CN204472781U CN201520068090.8U CN201520068090U CN204472781U CN 204472781 U CN204472781 U CN 204472781U CN 201520068090 U CN201520068090 U CN 201520068090U CN 204472781 U CN204472781 U CN 204472781U
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- pump housing
- drive motor
- assembly
- electric vacuum
- vacuum pump
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- Valves And Accessory Devices For Braking Systems (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The utility model provides a kind of electric vacuum pump, comprise drive motor assembly, pump housing assembly and noise-reducing structure assembly, the motor shaft of pump housing assembly and drive motor assembly forms radial disbalance mounting means, described drive motor assembly comprises drive motor and pump housing support, described pump housing assembly comprises upper cover plate, lower cover, rotor chamber, rotor and blade, and described noise-reducing structure assembly comprises shell, rubber ring; Extraction pipe, freeing pipe that described pump housing support is provided with air by-pass passage and communicates respectively with air by-pass passage, upper cover plate, the lower cover of described pump housing assembly have exhausr port or bleeding point.The enclosure of described noise-reducing structure assembly is provided with the cylindrical projection chamber with air channel.The utility model volume is little, pumping efficiency is high, noise is little, lightweight, effectively can solve the problem of braking automobile booster vacuum degree deficiency; Owing to have employed two-stage noise reduction cushion chamber, gas slowly is discharged into the external world, substantially reduces noise during work.
Description
Technical field
The utility model relates to a kind of electric vacuum pump, belongs to field of automobile brake.
Background technology
No matter be engine petrol or diesel motor, be not unique automobile power source, the direction of development of automobile is towards the future development such as multi fuel, hybrid electric vehicle.But fuel machine, battery-driven car etc. all lack driving engine, thus lack vacuum source.Braking automobile vacuum booster works by negative pressure of vacuum.If do not have vacuum source, braking automobile servo-unit is with regard to cisco unity malfunction.Therefore, independently vacuum source must be adopted in order to solve vacuum-assisted problem, thus to ensure its deceleration and stopping performance.
At present, the brake system vacuum source major part of automobile be provided by engine intake manifold or be directed to vehicle vacuum pump.But often braking automobile vacuum booster can exist the phenomenon of vacuum degree deficiency, and during the Motorized vacuum pump work of existing structure, pumping efficiency is low, and noise is obvious, and vacuum pump vanes is short for service life.Therefore, a kind of compensating device is needed to produce enough vacuum sources to the vacuum degree deficiency or direct device thus that make up driving engine generation.
Summary of the invention
Main purpose of the present utility model is to provide a kind of electric vacuum pump, and its volume is little, pumping efficiency is high, noise is little, lightweight, effectively can solve the problem of braking automobile booster vacuum degree deficiency.
In order to achieve the above object, the utility model adopts following technical scheme: a kind of electric vacuum pump, comprise drive motor assembly, pump housing assembly and noise-reducing structure assembly, the motor shaft of pump housing assembly and drive motor assembly forms radial disbalance mounting means, described drive motor assembly comprises direct-drive motor and pump housing support, described pump housing assembly comprises upper cover plate, lower cover, rotor chamber, rotor and blade, and described noise-reducing structure assembly comprises shell, rubber ring; Extraction pipe, freeing pipe that described pump housing support is provided with air by-pass passage and communicates respectively with air by-pass passage, upper cover plate, the lower cover of described pump housing assembly have exhausr port or bleeding point, and the enclosure of described noise-reducing structure assembly is provided with air channel and rubber ring.
As further preferred, the enclosure of described noise-reducing structure assembly is provided with the cylindrical projection chamber with described air channel, and described rubber ring is arranged on cylindrical projection cavity outer wall, is interference fit with cylindrical projection cavity outer wall mounting means.
As further preferably, form one-level noise reduction cushion chamber by described rubber ring and upper cover plate, shell and cylindrical projection chamber, form secondary noise reduction cushion chamber by described shell and pump housing support.Air channel in shell in cylindrical projection is the air by-pass passage of one-level silencing cavity and secondary silencing cavity, and rubber ring plays sealing, cushion gas effect.
As further preferred, described air by-pass passage is two, and one communicates with extraction pipe, and one communicates with freeing pipe.
As further preferred, the pump housing support of described drive motor assembly is provided with O type ring recess and bumper.
As further preferably, described O type ring recess is positioned at the outer edge of the air by-pass passage be connected with extraction pipe and the outer edge of pump housing assembly, and described bumper has two, outside the excircle being arranged on pump housing assembly.
As further preferred, the rotor in described pump housing assembly has the blade groove be circularly and evenly distributed, and the shape of described blade groove is semicircle.
As further preferred, the quantity of described blade groove is more than 4 or 4.
As further preferred, the blade plan form of described pump housing assembly is cylindrical.
As further preferred, described rotor chamber inner chamber is circular or oval chamber.
As further preferably, described drive motor axle is provided with only cover, described only cover and drive motor axle are interference fit, and described rotor has only grooving, and rotor does synchronous rotary move by stopping cover effect guarantee and drive motor axle.
The beneficial effects of the utility model are: during use, the utility model electric vacuum pump drive motor is connected with automobile storage battery, when automobile vacuum booster pressure sensor detects negative pressure deficiency in vacuum reservoir, send impulse singla just to electric vacuum pump control unit, electric vacuum pump receives entry into service after this signal, is extracted out by gas in vacuum reservoir thus makes to produce negative pressure of vacuum in vacuum reservoir.Therefore brake booster could be able to normally work, and this electric vacuum pump has the features such as volume is little, pumping efficiency is high, noise is little, lightweight.
The utility model can not only solve the problem of braking automobile booster vacuum degree deficiency by actv., and owing to have employed two-stage noise reduction cushion chamber, gas slowly is discharged into the external world, substantially reduces noise during work.Special the utility model have employed column type vane structure, and blade and rotor chamber contact internal walls are linear contact lay and friction mode is friction of rolling, greatly reduces the abrasion loss of blade.Compare other dry construction vacuum pump, the utility model life-span is greatly improved.
Accompanying drawing explanation
Fig. 1 is the explosive view of the utility model embodiment electric vacuum pump.
Fig. 2 is the cutaway view of the utility model embodiment electric vacuum pump pump housing assembly.
Fig. 3 is the cutaway view of the utility model embodiment electric vacuum pump drive motor assembly.
Fig. 4 is the explosive view of the utility model embodiment noise-reducing structure assembly.
Description of symbols in accompanying drawing is as follows: 1-drive motor, 2-pump housing support, 3-only cover, 4-bleeding point, 5-rotor chamber, 6-blade, 7-rotor, 8-upper cover plate, 9-shell, 10-rubber ring, 11-exhausr port, 12-stop grooving, 13-rotor chamber, 14-lower cover, 15-freeing pipe, 16-airtight chamber, 17-blade groove, 18-extraction pipe, 19-air by-pass passage, 20-motor shaft, 21-air by-pass passage, 22-O type ring recess, 23-bumper, 24-air channel, 25-cylindrical projection chamber.
Detailed description of the invention
The realization of the utility model object, functional characteristics and beneficial effect, be described further below in conjunction with specific embodiment and accompanying drawing.
Below in conjunction with the drawings and specific embodiments, technical scheme described in the utility model is described in further detail, to make those skilled in the art better can understand the utility model being implemented, but illustrated embodiment is not as to restriction of the present utility model.
As Figure 1-4, the utility model embodiment automobile brake boosting system electric vacuum pump, comprises drive motor 1, pump housing support 2, only cover 3, lower cover 14, rotor chamber 5, blade 6, rotor 7, upper cover plate 8, shell 9, rubber ring 10.Pump housing support 2 has air by-pass passage 19 with 21 and is connected with extraction pipe 18 with freeing pipe 15 respectively, and pump housing support 2 offers O type ring recess 22 and be provided with bumper 23.Lower cover 14 has bleeding point 4, and rotor 7 has the semicircle blade groove 17 that is circularly and evenly distributed and only grooving 12, and upper cover plate 8 has exhausr port 11, and shell 9 inside has air channel 24.Only cover 3 and motor shaft 20 interference fit, rotor 7 does synchronous rotary by only cover 3 and motor shaft 20 and moves.
The principle of work of the utility model embodiment is as follows: drive motor axle 20 rotarily drives rotor 7 and rotates, due to the effect of centnifugal force, the blade 6 be arranged in the semicircle blade groove 17 of rotor 7 is thrown out of and contacts with each other with rotor chamber 5 inwall, forms airtight chamber 16 (multiple).Airtight chamber 16 volume is alternately change constantly, thus formation is bled and exhaust process.So the bleeding point 4 that gas is entered on lower cover 14 through air by-pass passage 21 by the extraction pipe 18 on pump housing support 2 enters into airtight chamber 16.Then gas is entered into by the exhausr port 11 on upper cover plate 8 in the first-level buffer chamber that is made up of rubber ring 10 and the cylindrical projection chamber 25 in upper cover plate 8 and shell 9 again.Now obtained first time slow pressure by pressure gas.Then slow body of calming the anger is entered into by the air channel 24 on shell 9 in the secondary noise reduction cushion chamber that is made up of shell 9 and pump housing support 2 again.Gas after slow pressure impacts and is weakened by secondary noise reduction cushion chamber, is discharged into the external world finally by the air by-pass passage 19 on pump housing support 2 through freeing pipe 15.
The utility model embodiment can not only solve the problem of braking automobile booster vacuum degree deficiency by actv., and owing to have employed two-stage noise reduction cushion chamber, gas obtains being released slowly into the external world, substantially reduces noise during work.
Claims (10)
1. an electric vacuum pump, comprise drive motor assembly, pump housing assembly and noise-reducing structure assembly, the motor shaft of pump housing assembly and drive motor assembly forms radial disbalance mounting means, described drive motor assembly comprises drive motor and pump housing support, described pump housing assembly comprises upper cover plate, lower cover, rotor chamber, rotor and blade, and described noise-reducing structure assembly comprises shell; It is characterized in that: extraction pipe, freeing pipe that described pump housing support is provided with air by-pass passage and communicates respectively with air by-pass passage, upper cover plate, the lower cover of described pump housing assembly have exhausr port or bleeding point, and the enclosure of described noise-reducing structure assembly is provided with air channel and rubber ring.
2. electric vacuum pump according to claim 1, is characterized in that: the enclosure of described noise-reducing structure assembly is provided with the cylindrical projection chamber of described air channel, and described rubber ring is arranged on cylindrical projection cavity outer wall.
3. electric vacuum pump according to claim 1, is characterized in that: form first-level buffer chamber by described rubber ring and upper cover plate, shell and cylindrical projection chamber, form level 2 buffering chamber by described shell and pump housing support.
4. electric vacuum pump according to claim 1, is characterized in that: described air by-pass passage is two, and one communicates with extraction pipe, and one communicates with freeing pipe.
5. electric vacuum pump according to claim 1, is characterized in that: the pump housing support of described drive motor assembly is provided with O type ring recess and bumper.
6. electric vacuum pump according to claim 5, is characterized in that: described O type ring recess is positioned at the outer edge of the air by-pass passage be connected with extraction pipe and the outer edge of pump housing assembly, and described bumper has two, outside the excircle being arranged on pump housing assembly.
7. electric vacuum pump according to claim 1, is characterized in that: the rotor in described pump housing assembly has the blade groove be circularly and evenly distributed, and the shape of described blade groove is semicircle, and the blade plan form of described pump housing assembly is cylindrical.
8. electric vacuum pump according to claim 7, is characterized in that: the quantity of described blade groove is more than 4 or 4.
9. the electric vacuum pump according to claim 1 or 7, is characterized in that: the inner chamber of described rotor chamber is circular or oval chamber.
10. electric vacuum pump according to claim 1, it is characterized in that: the motor shaft of described drive motor assembly is provided with only cover, described only cover and drive motor axle are interference fit, described rotor has only grooving, and rotor does synchronous rotary move by stopping cover effect guarantee and drive motor axle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520068090.8U CN204472781U (en) | 2015-02-02 | 2015-02-02 | A kind of electric vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520068090.8U CN204472781U (en) | 2015-02-02 | 2015-02-02 | A kind of electric vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204472781U true CN204472781U (en) | 2015-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520068090.8U Active CN204472781U (en) | 2015-02-02 | 2015-02-02 | A kind of electric vacuum pump |
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| Country | Link |
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| CN (1) | CN204472781U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107901899A (en) * | 2017-09-30 | 2018-04-13 | 简式国际汽车设计（北京）有限公司 | A kind of four new plunger pump hydraulic control units and electronic hydraulic brake system |
-
2015
- 2015-02-02 CN CN201520068090.8U patent/CN204472781U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107901899A (en) * | 2017-09-30 | 2018-04-13 | 简式国际汽车设计（北京）有限公司 | A kind of four new plunger pump hydraulic control units and electronic hydraulic brake system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |