CN206246258U - A kind of electric EGR valve drive mechanism of constant torsion - Google Patents
A kind of electric EGR valve drive mechanism of constant torsion Download PDFInfo
- Publication number
- CN206246258U CN206246258U CN201621211406.5U CN201621211406U CN206246258U CN 206246258 U CN206246258 U CN 206246258U CN 201621211406 U CN201621211406 U CN 201621211406U CN 206246258 U CN206246258 U CN 206246258U
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- tooth bar
- egr valve
- driving
- drive mechanism
- pole
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Abstract
The utility model discloses a kind of electric EGR valve drive mechanism of constant torsion, including the motor being arranged in valve body, there is the driving tooth bar for driving center-pole to move up and down on the top of center-pole by hinge in the valve body, drives and engaged by change-speed gearing group between tooth bar and motor；The opposite side relative with sawtooth is provided with for the guiding mechanism to driving tooth bar to be oriented on the driving tooth bar.The utility model uses the driving combination of wheel and rack, on the basis of EGR valve action message is ensured, gap will be driven significantly to reduce, and ensure that EGR valve drives the arm of force to keep constant in different opening, open and more stablize, control is more accurate, disclosure satisfy that the electric EGR valve use demand of the larger engine of exhaust back pressure amplitude of variation.
Description
Technical field
The utility model is related to engine exhaust emission recirculating system technical field, particularly a kind of electric EGR valve
Drive mechanism.
Background technology
In engine exhaust-gas recirculating system（Egr system）In, EGR valves are mainly used in regulation control EGR gas
Flow, EGR valves make waste gas be returned after mixing by a certain percentage with fresh air by controlling aperture size to adjust exhaust gas flow
Back-steam cylinder is recycled, and to reduce combustor inner cylinder temperature and burning velocity, further reduces NOXDischarge capacity.
At present, the structure that the drive mechanism of most of EGR valves is coordinated using rocking arm with sliding block, rocking arm rotational band movable slider
Move up and down, be further driven to center-pole and move up and down, so that drive EGR valve to open and close, as shown in Fig. 2 rocking arm and cunning
The drawbacks of driving combination of block is present is larger gap；And driving arm of force when EGR valve opens different opening can change,
EGR valve opens bigger, and the arm of force is just elongated therewith, and opening force is less and less, further results in EGR valve and is arranged in engine accelerating mode
Controlled when atmospheric pressure is larger difficult.
Chinese patent 201420805024X discloses a kind of valve rod drive mechanism of EGR valve, be provided with valve body it is coaxial and
Center-pole and tooth bar that one end is fixedly connected, actuator are moved up and down by gear driving rack, and further tooth bar promotes center
Bar moves up and down to realize the opening and closing of EGR valve simultaneously.But the transmission of wheel and rack is inevitably caused
Tooth bar axial dipole field, therefore can cause the center-pole cannot to move vertically, the clamping stagnation of EGR valve is in turn resulted in, shorten making for EGR valve
Use the life-span.
The content of the invention
The utility model technical issues that need to address are to provide one kind and start suitable for exhaust back pressure amplitude of variation is larger
The electric EGR valve drive mechanism of machine, on the basis of EGR valve action message is ensured, reduces and drives gap, and makes torsion constant,
Improve EGR valve efficiency.
In order to solve the above technical problems, technical solution adopted in the utility model is as follows.
A kind of electric EGR valve drive mechanism of constant torsion, including the motor in valve body is arranged on, center in the valve body
There is the driving tooth bar for driving center-pole to move up and down on the top of bar by hinge, drives and passes through speed change between tooth bar and motor
Gear train is engaged；The opposite side relative with sawtooth is provided with for the guiding to driving tooth bar to be oriented on the driving tooth bar
Mechanism.
A kind of electric EGR valve drive mechanism of above-mentioned constant torsion, the guiding mechanism includes being arranged on valve interior wall
The guide rail parallel with tooth bar is driven and the top guide bearing and bottom that are arranged on driving tooth bar by support respectively are oriented to
Bearing, top guide bearing and bottom guide bearing are equipped with slide.
A kind of electric EGR valve drive mechanism of above-mentioned constant torsion, one end of the two stands is each attached to drive tooth bar
On, the other end of support is oppositely arranged, and support is 45 ~ 30 ° with the angle of driving tooth bar.
A kind of electric EGR valve drive mechanism of above-mentioned constant torsion, is provided with really in the valve body below the guiding mechanism
Center-pole is protected to be moved and fairlead with sealing function in vertical direction.
A kind of electric EGR valve drive mechanism of above-mentioned constant torsion, is additionally provided between the motor and change-speed gearing group
Bending moment gear.
As a result of above technical scheme, technological progress acquired by the utility model is as follows.
Drive mechanism of the present utility model is ensureing EGR valve action message using the driving combination of wheel and rack
On the basis of, gap will be driven significantly to reduce, and ensure that EGR valve drives the arm of force to keep constant in different opening, open
More stablize, control is more accurate, disclosure satisfy that the electric EGR valve use demand of the larger engine of exhaust back pressure amplitude of variation.
By hinge between center-pole of the invention and tooth bar, wheel and rack can be avoided from being driven the tooth bar axial dipole field for causing
The generation of the phenomenon of influence lower section center-pole vertical movement, coordinates the setting of guiding mechanism and fairlead, in being effectively ensured
The vertical movement of core bar, is that EGR valve action message provides safeguard.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the structural representation of traditional electric EGR valve drive mechanism.
Wherein：1. motor, 2. change-speed gearing group, 3. tooth bar, 4. top guide bearing, 5. guide rail, 6. bottom guide bearing,
7. bearing pin, 8. center-pole, 9. fairlead, 10. valve body；
A. rocking arm, B. sliding blocks.
Specific embodiment
The utility model is further elaborated below in conjunction with the drawings and specific embodiments.
A kind of electric EGR valve drive mechanism of constant torsion, including it is arranged on motor 1, reducing gear, drive in valve body 10
Motivation structure and guiding mechanism, the output shaft of motor drive drive mechanism to act through reducing gear, are further driven on center-pole
Lower movement, guiding mechanism is arranged on valve body and drive mechanism, for ensure drive mechanism can in the vertical direction keep straight
Line is moved, and is further ensured that center-pole moves along a straight line in vertical direction.
In the utility model, reducing gear uses train of reduction gears 2, drive mechanism to use vertical driving tooth bar 3, drives
Engaged by change-speed gearing group 2 between tooth bar 3 and motor 1, drive tooth bar bottom to be connected with center-pole top, driving tooth bar is with
Core bar in vertical direction coaxial line, as shown in Figure 1；During motor action, tooth bar is driven to move up and down by change-speed gearing group,
Center-pole is further driven to be moved up and down in valve body.Drive the bottom of tooth bar to be hinged by bearing pin 7 with the top of center-pole, adopt
This kind of connected mode is used, can allow there is slight axial angle to change when being moved between center-pole and driving tooth bar.
Guiding mechanism is used to be oriented to driving tooth bar, including guide rail 5, top guide bearing 4 and bottom guide bearing
6；Guide rail 5 is arranged on valve interior wall, and parallel with tooth bar is driven；Top guide bearing 4 and bottom guide bearing 6 pass through respectively
Support is arranged on the top and bottom driven on tooth bar, and top guide bearing and bottom guide bearing are equipped with slide,
So as to drive tooth bar to be play the guiding role in motion process.
On the basis of it ensure that to driving tooth bar to play guide effect, while driving tooth bar can be mitigated being moved through
Less extruding force is produced in journey to valve interior wall, one end of two stands is each attached to drive on tooth bar in the present invention, support
The other end is oppositely arranged, and support is 45 ~ 30 ° with the angle of driving tooth bar, as shown in Figure 1.
Fairlead 9 is provided with valve body below guiding mechanism, to ensure that center-pole is moved in vertical direction and plays close
Envelope is acted on.
To improve the opening force of EGR valve, it is necessary to increase motor force, the utility model is gone back between motor and change-speed gearing group
Bending moment gear is provided with, the action dynamics of EGR valve is greatly improved.
Claims (4)
1. a kind of electric EGR valve drive mechanism of constant torsion, including it is arranged on valve body（10）Interior motor（1）, its feature exists
In：Center-pole in the valve body（8）Top pass through bearing pin（7）It is hinged with the driving tooth bar for driving center-pole to move up and down（3）,
Drive tooth bar（3）With motor（1）Between pass through change-speed gearing group（2）Engagement；It is relative with sawtooth another on the driving tooth bar
Side is provided with for the guiding mechanism to driving tooth bar to be oriented to；
The guiding mechanism includes being arranged on valve interior wall the guide rail parallel with tooth bar is driven（5）And respectively by branch erection
Put and driving the top guide bearing on tooth bar（4）With bottom guide bearing（6）, top guide bearing and bottom guide bearing are equal
It is equipped with slide.
2. the electric EGR valve drive mechanism of a kind of constant torsion according to claim 1, it is characterised in that：Described two
One end of frame is each attached to drive on tooth bar, and the other end of support is oppositely arranged, and support is 45 ~ 30 ° with the angle of driving tooth bar.
3. the electric EGR valve drive mechanism of a kind of constant torsion according to claim 1, it is characterised in that：The guiding
Being provided with valve body below mechanism ensures that center-pole is moved and fairlead with sealing function in vertical direction（9）.
4. the electric EGR valve drive mechanism of a kind of constant torsion according to claim 1, it is characterised in that：The motor
Bending moment gear is additionally provided between change-speed gearing group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621211406.5U CN206246258U (en) | 2016-11-10 | 2016-11-10 | A kind of electric EGR valve drive mechanism of constant torsion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621211406.5U CN206246258U (en) | 2016-11-10 | 2016-11-10 | A kind of electric EGR valve drive mechanism of constant torsion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206246258U true CN206246258U (en) | 2017-06-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621211406.5U Active CN206246258U (en) | 2016-11-10 | 2016-11-10 | A kind of electric EGR valve drive mechanism of constant torsion |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106438119A (en) * | 2016-11-10 | 2017-02-22 | 无锡隆盛科技股份有限公司 | Constant-torque electric EGR (Exhaust Gas Recirculation) valve driving mechanism |
-
2016
- 2016-11-10 CN CN201621211406.5U patent/CN206246258U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106438119A (en) * | 2016-11-10 | 2017-02-22 | 无锡隆盛科技股份有限公司 | Constant-torque electric EGR (Exhaust Gas Recirculation) valve driving mechanism |
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