阅读说明：本技术 一种凸轮移位电磁执行器 (Cam shift electromagnetic actuator ) 是由 周强 王波 张涛 张金伟 于 2020-10-12 设计创作，主要内容包括：本发明公开了一种凸轮移位电磁执行器,包括电磁铁,电磁铁内设置有铁芯,铁芯上套设有螺线管,铁芯远离螺线管的一端设置有用于调节凸轮滑移的阀芯,阀芯上沿着靠近铁芯的一端依次套设有下垫片、永磁体和上垫片,阀芯上还设置有轴套,轴套设置在永磁体、下垫片与阀芯之间,轴套远离阀芯的一端与铁芯抵持。能够将轴套设置成帽子形状,并扣于阀芯上进行安装固定,轴套将阀芯与铁芯隔开,避免阀芯与铁芯接触,造成铁芯磨损严重。初始位置时铁芯与轴套接触,通过永磁体将阀芯保持在初始位置状态,螺线管通电后铁芯端面变磁极,与永磁铁磁极排斥,推动阀芯轴向移动,解决推杆与铁芯撞击磨损的问题,保证铁芯对推杆在初始位置的保持力。(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. 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.)

1. The 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, one end, away from the solenoid, of the iron core is provided with a valve core used for adjusting sliding of a cam, 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.

2. The cam shifting electromagnetic actuator according to claim 1, wherein a first abutting portion for abutting against the iron core is provided at one end of the shaft sleeve away from the valve core, and the first abutting portion is a plane.

3. The cam shifting electromagnetic actuator according to claim 2, wherein a second abutting portion for abutting against the shaft sleeve is provided on one side of the iron core close to the shaft sleeve, and the second abutting portion is a plane.

4. The cam shifting electromagnetic actuator according to claim 3, wherein an oil guiding groove is formed around the second abutting portion, and the oil guiding groove is used for guiding away the oil around the first abutting portion and the second abutting portion.

5. The cam shifting electromagnetic actuator according to claim 4, wherein the oil guide grooves are plural in number and are uniformly distributed around the first abutting portion.

6. The cam shifting electromagnetic actuator of claim 1, wherein the bushing is made of a high reluctance material.

7. 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.

8. The cam shifting electromagnetic actuator of claim 1, wherein the height of the lower surface of the bushing is not lower than the height of the lower surface of the permanent magnet.

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 includes 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, a lower gasket 7, a permanent magnet 5 and an upper gasket 4 are sequentially sleeved on the valve core 9 along one end, which is close to the iron core 3, the valve core 9 is further provided with a shaft sleeve 86, the shaft sleeve 86 is arranged among the permanent magnet 5, the lower gasket 7 and the valve core 9, and one end, which is far away from the valve core 9, of the shaft sleeve. The shaft sleeve 86 can be arranged in a cap shape and buckled on the valve core 9 for installation and fixation, and the shaft sleeve 86 separates the valve core 9 from the iron core 3, so that the valve core 9 is prevented from contacting the iron core 3, and the iron core 3 is prevented from being seriously abraded. Iron core 3 and axle sleeve 86 contact during initial position, through 5 magnetic attraction to iron core 3 of permanent magnet with case 9 keep initial position state, solenoid 2 circular telegram 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 iron core 3 to the holding power of push rod at initial position.

Example 2: in the present embodiment, one end of the shaft sleeve 86 away from the valve core 9 is provided with a first abutting portion 61 for abutting against the iron core 3, 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 86 in this embodiment is provided with a second abutting portion 31 for abutting against the shaft sleeve 86, 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 86.

Example 3: the sleeve 86 of this embodiment is made of a high reluctance 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 86 of this 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 86 of this 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 86 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.