CN204327325U - A kind of valve rod driving mechanism of EGR valve - Google Patents
A kind of valve rod driving mechanism of EGR valve Download PDFInfo
- Publication number
- CN204327325U CN204327325U CN201420805024.XU CN201420805024U CN204327325U CN 204327325 U CN204327325 U CN 204327325U CN 201420805024 U CN201420805024 U CN 201420805024U CN 204327325 U CN204327325 U CN 204327325U
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- CN
- China
- Prior art keywords
- valve
- valve rod
- tooth bar
- driving mechanism
- egr
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
The utility model provides a kind of valve rod driving mechanism of EGR valve, belongs to valve technology field.It solve the problem that existing electric EGR valve valve rod driving mechanism structure is comparatively complicated.The valve rod driving mechanism of this EGR valve, EGR valve comprises valve body, and sliding in valve body is provided with valve rod, one end of valve rod is fixed with tooth bar, tooth bar is coaxial with valve rod, and valve body is provided with the actuation gear be meshed with tooth bar, valve body is fixed with the actuator for driving actuation gear to rotate.The valve rod driving mechanism of this EGR valve has the simple advantage of structure.
Description
Technical field
The utility model belongs to valve technology field, relates to a kind of EGR valve, particularly a kind of valve rod driving mechanism of EGR valve.
Background technique
Engine exhaust-gas recirculating system (abbreviation egr system) is for reducing the discharge capacity of nitrogen oxides in waste gas, when its function mode refers to and operates under engine load, EGR valve is opened, a small amount of waste gas that motor is discharged is transmitted back to intake manifold, and enters cylinder again burn together with fresh inflammable mixture.Its principle is, utilizes a large amount of CO2 contained in waste gas, and CO2 can not burn and can absorb a large amount of heat, and the combustion temperature of mixed gas in cylinder is reduced, thus reduces the growing amount of NOx, reduces exhaust pollution.
EGR valve in egr system is mainly used in the flow of regulable control EGR gas, the working principle of conventional electric EGR valve is slowed down by double-reduction gear by the moment of torsion that direct current generator exports, after increasing output torque and reduction rotational speed, be straight line motion by eccentric wheel by convert rotational motion again, thus the action of band ovable valve stem, realize the open and close of EGR valve.
Disclosed in Chinese patent storehouse, a kind of employing reverses motor-driven electric EGR valve [application number: 201110224957.0; Authorization Notice No.: CN 102287295 A], comprise the valve block of valve body, valve rod, the connection of valve rod lower end, the lower end of valve body is suction port, and described valve rod is connected with torsion motor by connection set.Motor-driven electric EGR valve is reversed in described employing, it is characterized in that: described connection set comprises the connection bent plate that valve rod upper end connects, the eccentric wheel be connected with the rotor reversing motor, torsion spring, eccentric wheel is provided with involute groove, connect bent plate by connecting rod connection bearing, Bearing configuration is in eccentric involute groove, one end of torsion spring connects the stator reversing motor, and the other end of torsion spring is connected on eccentric wheel.
It is as follows that motor-driven electric EGR valve working principle is reversed in above-mentioned employing: give and reverse feeding electric motors, rotate after making rotor and eccentric wheel overcome the convolution pulling force of torsion spring, slided in eccentric involute groove by bearing, band ovable valve stem and valve block move downward, and namely realize the function that EGR valve is opened.When reducing to reverse feeding electric motors electric current, by the pulling force of torsion spring, rotor and eccentric reversion can be realized, thus band ovable valve stem and spool move upward, and namely realize the closing function of EGR valve.
This electric EGR valve is moved by the connecting band ovable valve stem reversed between motor, eccentric wheel, torsion spring, bearing, connection bent plate, and structure is comparatively complicated.
Summary of the invention
The purpose of this utility model there are the problems referred to above for existing technology, proposes the valve rod driving mechanism of the simple EGR valve of a kind of structure.
The purpose of this utility model realizes by following technical proposal: a kind of valve rod driving mechanism of EGR valve, EGR valve comprises valve body, slide in described valve body and be provided with valve rod, it is characterized in that, one end of described valve rod is fixed with tooth bar, described tooth bar is coaxial with valve rod, and described valve body is provided with the actuation gear be meshed with tooth bar, described valve body is fixed with the actuator for driving actuation gear to rotate.
During work, actuation gear is driven to rotate and be converted into moving up and down thus being with ovable valve stem to move up and down the keying of control valve of tooth bar by actuator, moved by the connecting band ovable valve stem reversed between motor, eccentric wheel, torsion spring, bearing, connection bent plate relative in prior art, there is the advantage that structure is simple, easy for installation.
In the valve rod driving mechanism of above-mentioned EGR valve, described actuator is torque motor, and described actuation gear is fixed on the output shaft of torque motor.
Move actuation gear by torque motor direct tape splicing to rotate, there is the advantage that structure is simple, easy to connect.
In the valve rod driving mechanism of above-mentioned EGR valve, described actuator comprises motor and is arranged on the train of reduction gears on valve body, and described motor drives actuation gear to rotate by train of reduction gears.
In the valve rod driving mechanism of above-mentioned EGR valve, described valve body is provided with chute in vertical bar shape and parallel with valve rod axis, described tooth bar has projection portion, and described projection portion embeds the chute place of valve body.
When valve rod moves up and down, the projection portion on tooth bar can slide up and down in chute, plays leading role to the movement of valve rod, thus valve rod is glided more swimmingly, the keying of the control valve enabling valve rod stable.
In the valve rod driving mechanism of above-mentioned EGR valve, described tooth bar is column, the end that described tooth bar is adjacent with valve rod has L-shaped breach, bearing pin is fixed with inside described valve body, the teeth of described tooth bar, between actuation gear and bearing pin, described bearing pin are fixed with a bearing and the madial wall of the outer ring of this bearing and described breach offsets.
The madial wall of bearing outer ring and breach against, play leading role when tooth bar is moved, then strengthen the smooth and easy degree of valve rod movement further, then improve the stability that valve rod control valve opens and closes further.
In the valve rod driving mechanism of above-mentioned EGR valve, described tooth bar is cylindric and has spiral teeth outside this tooth bar.
By being arranged to spiral helicine teeth, making the transmission between tooth bar and actuation gear comparatively smooth and easy, valve rod is glided more swimmingly, the keying of the control valve enabling valve rod stable.
Compared with prior art, the valve rod driving mechanism of this EGR valve has the following advantages:
1, move actuation gear by torque motor direct tape splicing rotate and be converted into moving up and down thus being with ovable valve stem to move up and down the keying of control valve of tooth bar, moved by the connecting band ovable valve stem reversed between motor, eccentric wheel, torsion spring, bearing, connection bent plate relative in prior art, there is the advantage that structure is simple, easy for installation.
2, by the slip of projection portion in chute on tooth bar, leading role is played to the movement of valve rod, thus valve rod is glided more swimmingly, the keying of the control valve enabling valve rod stable.
3, bearing outer ring and breach madial wall against, play leading role when tooth bar is moved, then strengthen the smooth and easy degree of valve rod movement further, then improve the stability that valve rod control valve opens and closes further.
Accompanying drawing explanation
Fig. 1 is the structural representation of the valve rod driving mechanism of this EGR valve.
Fig. 2 is the linkage structure schematic diagram of tooth bar and valve body.
In figure, 1, valve body; 1a, chute; 3, valve rod; 4, tooth bar; 4a, teeth; 4b, projection portion; 4c, breach; 5, actuation gear; 6, bearing pin; 7, torque motor; 8, bearing.
Embodiment
Be below specific embodiment of the utility model and by reference to the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiments.
As shown in Figure 1, EGR valve comprises valve body 1, and valve rod 3 is positioned at valve body 1.The valve rod driving mechanism of this EGR valve is positioned at valve body 1 and is made up of tooth bar 4, actuation gear 5, actuator, bearing pin 6 etc.Wherein, tooth bar 4 is column and coaxially arranges with valve rod 3.In the present embodiment, the end face that tooth bar 4 is adjacent with valve rod 3 has attachment hole, and valve rod 3 is by being tightly fixed in attachment hole.
The wherein side of tooth bar 4 has teeth 4a and teeth 4a extends to the other end of tooth bar 4 from one end of tooth bar 4.Actuation gear 5 is positioned at the side of tooth bar 4 and this actuation gear 5 is meshed with the teeth 4a of tooth bar 4.
Actuator is torque motor 7, the output shaft of torque motor 7 extend in valve body 1 and actuation gear 5 is fixed on the output shaft of torque motor 7, thus is worked by torque motor 7 and drive actuation gear 5 rotate and be converted into moving up and down thus being with ovable valve stem 3 to move up and down the keying of control valve of tooth bar 4.Nature, actuator can be also motor and the train of reduction gears be arranged on valve body 1, and motor drives actuation gear 5 to rotate by train of reduction gears.
Further illustrate, as shown in Figure 2, valve body 1 madial wall has in vertical bar shape and the chute 1a of valve rod 3 axis being parallel, tooth bar 4 has projection portion 4b and this projection portion 4b is embedded in chute 1a, thus leading role is played to moving up and down of tooth bar 4, valve rod 3 is glided more swimmingly, makes the keying of the control valve that valve rod 3 can be stable.
The end that tooth bar 4 is adjacent with valve rod 3 has L-shaped breach 4c and the teeth 4a of this breach 4c and tooth bar 4 is relative.Bearing pin 6 is fixed in valve body 1, bearing 8 inner ring to be fixed on bearing pin 6 by interference fit ground mode and the madial wall of bearing 8 outer ring and breach 4c offsets, leading role is played when tooth bar 4 is moved, then strengthen the smooth and easy degree of valve rod 3 movement further, then improve the stability that valve rod 3 control valve opens and closes further.
Embodiment two
The present embodiment two with the structure of embodiment one and principle substantially identical, different place is: tooth bar 4 is cylindric and has spiral teeth 4a outside this tooth bar 4, make the transmission between tooth bar 4 and actuation gear 5 comparatively smooth and easy, valve rod 3 is glided more swimmingly, makes the keying of the control valve that valve rod 3 can be stable.
Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various amendment or supplements or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present utility model or surmount the scope that appended claims defines.
Claims (6)
1. the valve rod driving mechanism of an EGR valve, EGR valve comprises valve body (1), slide in described valve body (1) and be provided with valve rod (3), it is characterized in that, one end of described valve rod (3) is fixed with tooth bar (4), described tooth bar (4) is coaxial with valve rod (3), described valve body (1) is provided with the actuation gear (5) be meshed with tooth bar (4), described valve body (1) is fixed with the actuator for driving actuation gear (5) to rotate.
2. the valve rod driving mechanism of EGR valve according to claim 1, is characterized in that, described actuator is torque motor (7), and described actuation gear (5) is fixed on the output shaft of torque motor (7).
3. the valve rod driving mechanism of EGR valve according to claim 1, it is characterized in that, described actuator comprises motor and is arranged on the train of reduction gears on valve body (1), and described motor drives actuation gear (5) to rotate by train of reduction gears.
4. the valve rod driving mechanism of the EGR valve according to Claims 2 or 3, it is characterized in that, described valve body (1) be provided with in vertical bar shape and with the chute (1a) of valve rod (3) axis being parallel, described tooth bar (4) has projection portion (4b), described projection portion (4b) embeds chute (1a) place of valve body (1).
5. the valve rod driving mechanism of EGR valve according to claim 1, it is characterized in that, described tooth bar (4) is in column, the end that described tooth bar (4) is adjacent with valve rod (3) has L-shaped breach (4c), described valve body (1) inner side is fixed with bearing pin (6), the teeth (4a) of described tooth bar (4) are positioned between actuation gear (5) and bearing pin (6), described bearing pin (6) are fixed with a bearing (8) and the madial wall of the outer ring of this bearing (8) and described breach (4c) offsets.
6. the valve rod driving mechanism of EGR valve according to claim 1, is characterized in that, in cylindric and this tooth bar (4), outside has spiral teeth (4a) to described tooth bar (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420805024.XU CN204327325U (en) | 2014-12-17 | 2014-12-17 | A kind of valve rod driving mechanism of EGR valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420805024.XU CN204327325U (en) | 2014-12-17 | 2014-12-17 | A kind of valve rod driving mechanism of EGR valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204327325U true CN204327325U (en) | 2015-05-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420805024.XU Expired - Fee Related CN204327325U (en) | 2014-12-17 | 2014-12-17 | A kind of valve rod driving mechanism of EGR valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204327325U (en) |
Cited By (2)
| 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 |
| CN107542603A (en) * | 2016-06-27 | 2018-01-05 | 马涅蒂-马瑞利公司 | EGR valve actuator device and related EGR valve sub-assembly in explosive motor |
-
2014
- 2014-12-17 CN CN201420805024.XU patent/CN204327325U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107542603A (en) * | 2016-06-27 | 2018-01-05 | 马涅蒂-马瑞利公司 | EGR valve actuator device and related EGR valve sub-assembly in explosive motor |
| 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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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150513 Termination date: 20211217 |