CN112412567B - Cam shift electromagnetic actuator - Google Patents
Cam shift electromagnetic actuator Download PDFInfo
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- CN112412567B CN112412567B CN202011082544.9A CN202011082544A CN112412567B CN 112412567 B CN112412567 B CN 112412567B CN 202011082544 A CN202011082544 A CN 202011082544A CN 112412567 B CN112412567 B CN 112412567B
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- iron core
- valve core
- shaft sleeve
- core
- permanent magnet
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Abstract
The invention discloses a cam shifting electromagnetic actuator which comprises an electromagnet, wherein an iron core is arranged in the electromagnet, a solenoid is sleeved on the iron core, a valve core used for adjusting the sliding of a cam is arranged at one end, away from the solenoid, of the iron core, a lower gasket, a permanent magnet and an upper gasket are sequentially sleeved on the valve core along one end, close to the iron core, of the valve core, a shaft sleeve is further arranged on the valve core, the shaft sleeve is arranged among the permanent magnet, the lower gasket and the valve core, and one end, away from the valve core, of the shaft sleeve abuts against the iron core. The shaft sleeve can be arranged in a hat shape and is buckled on the valve core for installation and fixation, and the shaft sleeve separates the valve core from the iron core, so that the valve core is prevented from contacting the iron core, and the iron core is prevented from being seriously abraded. When the valve core is in the initial position, the iron core is in contact with the shaft sleeve, the valve core is kept in the initial position state through the permanent magnet, the end face of the iron core becomes a magnetic pole after the solenoid is electrified and repels the magnetic pole of the permanent magnet to push the valve core to move axially, the problem of impact abrasion between the push rod and the iron core is solved, and the retaining force of the iron core on the push rod in the initial position is ensured.
Description
Technical Field
The invention relates to the technical field of automobile parts, in particular to a cam displacement electromagnetic actuator.
Background
In the electromagnetic devices currently known for adjusting the cam displacements of engines, it is known to vary the axial position of a sleeve that is rotatable integrally with the shaft and moves axially towards the relative along the camshaft of the shaft. The electromagnetic actuator is a driving mechanism for driving the cam sleeve to move, and gives out a control signal according to the actual working condition requirement of the engine by the engine controller to drive the electromagnetic actuator to act. The axial movement of the cam sleeve on the camshaft is realized, so that the cam displacement is realized to achieve the purpose of adjusting the valve lift.
However, the existing cam shift electromagnetic actuator has the following defects: 1. in order to improve the wear resistance of the valve core unit, the hardness of the valve core unit is higher. The end face of the valve core unit is contacted with the end face of the iron core, and the end face of the iron core is abraded greatly after being durable, so that the durability is influenced; 2. the permanent magnet of the existing cam displacement electromagnetic actuator is arranged between 2 supporting plates, and the penetrated valve core unit needs to be formed by an iron core unit with higher magnetic resistance so as to prevent the magnetic flux of the permanent magnet from gathering to the valve core unit and reduce the selectivity of valve core materials. Therefore, a cam-shifting electromagnetic actuator capable of ensuring the holding force of the iron core on the push rod at the initial position is urgently needed.
Disclosure of Invention
Aiming at the defects in the technology, the invention provides the cam shifting electromagnetic actuator, which solves the problem of impact abrasion between the push rod and the iron core and ensures the holding force of the iron core on the push rod at the initial position.
In order to achieve the purpose, the invention provides a cam shifting electromagnetic actuator which comprises an electromagnet, wherein an iron core is arranged in the electromagnet, a solenoid is sleeved on the iron core, a valve core used for adjusting the sliding of a cam is arranged at one end, far away from the solenoid, of the iron core, a lower gasket, a permanent magnet and an upper gasket are sequentially sleeved on the valve core along one end, close to the iron core, a shaft sleeve is further arranged on the valve core, the shaft sleeve is arranged among the permanent magnet, the lower gasket and the valve core, and one end, far away from the valve core, of the shaft sleeve abuts against the iron core. The shaft sleeve can be arranged in a hat shape and is buckled on the valve core for installation and fixation, and the shaft sleeve separates the valve core from the iron core, so that the valve core is prevented from contacting the iron core, and the iron core is prevented from being seriously abraded. The iron core contacts with the axle sleeve during initial position, keeps the case at initial position state through the magnetic attraction of permanent magnet to the iron core, and solenoid circular telegram back, the iron core terminal surface becomes the magnetic pole, repels with permanent magnet magnetic pole mutually, promotes the valve core axial and removes, solves the problem of push rod and iron core striking wearing and tearing, guarantees the iron core to the holding power of push rod at initial position.
Preferably, one end of the shaft sleeve, which is far away from the valve core, is provided with a first abutting portion for abutting against the iron core, and the first abutting portion is a plane. The first abutting part is positioned in the center of the iron core.
Preferably, one side of the iron core, which is close to the shaft sleeve, is provided with a second abutting portion for abutting against the shaft sleeve, and the second abutting portion is a plane.
Preferably, an oil guide groove is formed in the periphery of the second abutting portion, and the oil guide groove is used for guiding away the engine oil around the first abutting portion and the second abutting portion.
Preferably, the number of the oil guide grooves is multiple, and the oil guide grooves are uniformly distributed around the first abutting portion. The influence of the engine oil on the performance of the electromagnetic actuator in the contact area of the iron core and the shaft sleeve is reduced.
Preferably, the shaft sleeve is made of high-magnetic-resistance material. The magnetic flux of the valve core unit and the iron core unit is prevented from flowing.
Preferably, the installation height of the shaft sleeve is higher than that of the upper gasket. Avoid iron core and last gasket contact, avoid forming great magnetic attraction.
Preferably, the height of the lower surface of the shaft sleeve is not lower than that of the lower surface of the permanent magnet. Magnetic flux generated by the permanent magnet is prevented from being gathered on the valve core unit, and the attraction of the permanent magnet to the iron core is reduced. And the impact force generated by the impact of the shaft sleeve and the iron core is transmitted to the valve core in the process of the return action of the valve core, and is not transmitted to the permanent magnet, so that the permanent magnet is prevented from being damaged.
The invention has the beneficial effects that: compared with the prior art, the cam shifting electromagnetic actuator comprises an electromagnet, wherein an iron core is arranged in the electromagnet, a solenoid is sleeved on the iron core, a valve core used for adjusting the sliding of a cam is arranged at one end, far away from the solenoid, of the iron core, a lower gasket, a permanent magnet and an upper gasket are sequentially sleeved on the valve core along one end, close to the iron core, a shaft sleeve is further arranged on the valve core, the shaft sleeve is arranged among the permanent magnet, the lower gasket and the valve core, and one end, far away from the valve core, of the shaft sleeve abuts against the iron core. The shaft sleeve can be arranged in a hat shape and is buckled on the valve core for installation and fixation, and the shaft sleeve separates the valve core from the iron core, so that the valve core is prevented from contacting the iron core, and the iron core is prevented from being seriously abraded. The iron core contacts with the axle sleeve during initial position, keeps the case at initial position state through the magnetic attraction of permanent magnet to the iron core, and solenoid circular telegram back, the iron core terminal surface becomes the magnetic pole, repels with permanent magnet magnetic pole mutually, promotes the valve core axial and removes, solves the problem of push rod and iron core striking wearing and tearing, guarantees the iron core to the holding power of push rod at initial position.
Drawings
FIG. 1 is a first state block diagram of the present application;
FIG. 2 is a top view of the present application;
fig. 3 is a second state structural view of the present application.
Description of the symbols of the main elements: 1. an electromagnet; 2. a solenoid; 3. an iron core; 4. an upper gasket; 5. a permanent magnet; 6. a shaft sleeve; 7. a lower gasket; 8. a valve housing; 9. a valve core; 31. a second abutting portion; 61. a first abutting portion; 62. and an oil guide groove.
Detailed Description
In order to more clearly describe the present invention, the present invention will be further described with reference to the accompanying drawings.
Example 1: referring to fig. 1 to 2, the invention discloses a cam shift electromagnetic actuator, which comprises an electromagnet 1, wherein an iron core 3 is arranged in the electromagnet 1, the iron core 3 is sleeved with a solenoid 2, one end of the iron core 3, which is far away from the solenoid 2, is provided with a valve core 9 for adjusting cam slippage, one end of the valve core 9, which is close to the iron core 3, is sequentially sleeved with a lower gasket 7, a permanent magnet 5 and an upper gasket 4, the valve core 9 is also provided with a shaft sleeve 6, the shaft sleeve 6 is arranged among the permanent magnet 5, the lower gasket 7 and the valve core 9, and one end of the shaft sleeve 6, which is far away from the valve core 9, is abutted against the iron core 3. Can set up axle sleeve 6 into cap shape to detain and install fixedly on case 9, axle sleeve 6 separates case 9 and iron core 3, avoids case 9 and iron core 3 contact, causes iron core 3 serious wearing and tearing. Iron core 3 and the contact of axle sleeve 6 during initial position, through 5 magnetic attraction to iron core 3 of permanent magnet with case 9 keep initial position state, solenoid 2 circular telegrams back, 3 terminal surfaces of iron core become the magnetic pole, repel with permanent magnet magnetic pole mutually, promote 9 axial displacement of valve core, solve the problem of push rod and 3 impact wear of iron core, guarantee that iron core 3 is to the holding power of push rod at initial position.
Example 2: in the present embodiment, a first abutting portion 61 for abutting against the iron core 3 is disposed at one end of the shaft sleeve 6 away from the valve core 9, and the first abutting portion 61 is a plane. The first abutting portion 61 is located at the center of the core 3. One side of the iron core 3 close to the shaft sleeve 6 in this embodiment is provided with a second abutting portion 31 for abutting against the shaft sleeve 6, and the second abutting portion 31 is a plane. The periphery of the second abutting portion 31 of the present embodiment is provided with an oil guiding groove 62, and the oil guiding groove 62 is used for guiding away the engine oil around the first abutting portion 61 and the second abutting portion 31. The oil guiding grooves 62 of the present embodiment are plural and are uniformly distributed around the first abutting portion 61. So as to reduce the influence of the oil on the performance of the electromagnetic actuator in the contact area of the iron core 3 and the shaft sleeve 6.
Example 3: the sleeve 6 of the present embodiment is made of a high magnetic resistance material. The magnetic flux of the valve core 9 unit and the iron core 3 unit is prevented from flowing. The mounting height of the boss 6 of the present embodiment is higher than that of the upper spacer 4. Avoid iron core 3 and last gasket 4 contact, avoid forming great magnetic attraction. The height of the lower surface of the sleeve 6 of the present embodiment is not lower than the height of the lower surface of the permanent magnet 5. Magnetic flux generated by the permanent magnet 5 is prevented from being gathered on the valve core 9 unit, and the attraction force of the permanent magnet 5 to the iron core 3 is reduced. And the impact force generated by the collision of the shaft sleeve 6 and the iron core 3 is transmitted to the valve core 9 in the process of the return action of the valve core 9, and is not transmitted to the permanent magnet 5, so that the permanent magnet 5 is prevented from being damaged.
The above disclosure is only for a few specific embodiments of the present invention, but the present invention is not limited thereto, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.
Claims (5)
1. A cam shifting electromagnetic actuator is characterized by comprising an electromagnet, wherein an iron core is arranged in the electromagnet, a solenoid is sleeved on the iron core, a valve core used for adjusting the sliding of a cam is arranged at one end, away from the solenoid, of the iron core, a lower gasket, a permanent magnet and an upper gasket are sequentially sleeved on the valve core along one end, close to the iron core, a shaft sleeve is further arranged on the valve core, the shaft sleeve is arranged among the permanent magnet, the lower gasket and the valve core, and one end, away from the valve core, of the shaft sleeve abuts against the iron core; one end, far away from the valve core, of the shaft sleeve is provided with a first abutting part for abutting against the iron core, and the first abutting part is a plane; one side of the iron core, which is close to the shaft sleeve, is provided with a second abutting part which is used for abutting against the shaft sleeve, and the second abutting part is a plane; and the periphery of the first abutting part is provided with an oil guide groove which is used for guiding away the engine oil at the periphery of the first abutting part and the second abutting part.
2. The cam shifting electromagnetic actuator according to claim 1, wherein the oil guide grooves are plural in number and are uniformly distributed around the first abutting portion.
3. The cam shifting electromagnetic actuator of claim 1, wherein the bushing is made of a high reluctance material.
4. The cam shifting electromagnetic actuator of claim 1, wherein the mounting height of the bushing is higher than the mounting height of the upper spacer.
5. The cam shifting electromagnetic actuator of claim 1,
the height of the lower surface of the shaft sleeve is not lower than that of the lower surface of the permanent magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011082544.9A CN112412567B (en) | 2020-10-12 | 2020-10-12 | Cam shift electromagnetic actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011082544.9A CN112412567B (en) | 2020-10-12 | 2020-10-12 | Cam shift electromagnetic actuator |
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| Publication Number | Publication Date |
|---|---|
| CN112412567A CN112412567A (en) | 2021-02-26 |
| CN112412567B true CN112412567B (en) | 2021-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011082544.9A Active CN112412567B (en) | 2020-10-12 | 2020-10-12 | Cam shift electromagnetic actuator |
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| CN (1) | CN112412567B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113503199B (en) * | 2021-05-24 | 2023-07-25 | 绵阳富临精工股份有限公司 | Cam shift electromagnetic actuator |
| CN114255958B (en) * | 2021-11-08 | 2023-07-25 | 绵阳富临精工股份有限公司 | Electromagnetic actuator |
| CN116066438B (en) * | 2022-12-27 | 2024-01-30 | 中国矿业大学 | Leakage-free impact-resistant high-speed digital valve |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0354417A1 (en) * | 1988-08-09 | 1990-02-14 | Ag Audi | Positioning device for a gas exchange valve |
| JPH0960512A (en) * | 1995-08-25 | 1997-03-04 | Honda Motor Co Ltd | Valve system for internal combustion engine |
| CN104520947A (en) * | 2012-08-08 | 2015-04-15 | Eto电磁有限责任公司 | Bistable electromagnetic actuating apparatus, armature assembly and camshaft adjustment apparatus |
| CN105781660A (en) * | 2015-01-09 | 2016-07-20 | 株式会社电装 | Electromagnetic actuator |
| WO2017207035A1 (en) * | 2016-05-31 | 2017-12-07 | Eto Magnetic Gmbh | Electromagnetic setting device and camshaft adjustment device |
| CN108301891A (en) * | 2018-03-22 | 2018-07-20 | 绵阳富临精工机械股份有限公司 | A kind of electromagnetic actuator for cam displacement |
| CN109026254A (en) * | 2018-09-18 | 2018-12-18 | 浙江正奥汽配有限公司 | A kind of driving device of engine valve control |
-
2020
- 2020-10-12 CN CN202011082544.9A patent/CN112412567B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0354417A1 (en) * | 1988-08-09 | 1990-02-14 | Ag Audi | Positioning device for a gas exchange valve |
| JPH0960512A (en) * | 1995-08-25 | 1997-03-04 | Honda Motor Co Ltd | Valve system for internal combustion engine |
| CN104520947A (en) * | 2012-08-08 | 2015-04-15 | Eto电磁有限责任公司 | Bistable electromagnetic actuating apparatus, armature assembly and camshaft adjustment apparatus |
| CN105781660A (en) * | 2015-01-09 | 2016-07-20 | 株式会社电装 | Electromagnetic actuator |
| WO2017207035A1 (en) * | 2016-05-31 | 2017-12-07 | Eto Magnetic Gmbh | Electromagnetic setting device and camshaft adjustment device |
| CN108301891A (en) * | 2018-03-22 | 2018-07-20 | 绵阳富临精工机械股份有限公司 | A kind of electromagnetic actuator for cam displacement |
| CN109026254A (en) * | 2018-09-18 | 2018-12-18 | 浙江正奥汽配有限公司 | A kind of driving device of engine valve control |
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| CN112412567A (en) | 2021-02-26 |
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