阅读说明：本技术 双销电磁阀 (Double-pin electromagnetic valve ) 是由 鲁震 吴广权 陈良 练海年 雷霆 梁明曦 于 2020-06-15 设计创作，主要内容包括：本发明提供的双销电磁阀,其包括阀壳体、与阀壳体连接的导向壳体、在导向壳体内伸缩位移的第一致动销和第二致动销以及锁止机构和复位机构,锁止机构在第一致动销伸出时锁止第二致动销,或在第二致动销伸出时锁止第一致动销,或者在第一和第二致动销同时伸出时锁止双致动销；锁止机构包括移动件,其移动设置于导向壳体；第一拉杆,其端部分别与第一致动销和移动件连接；第二拉杆,其端部分别与第二致动销和移动件连接；复位机构用于致动销的伸出复位。本发明通过锁止机构对第一和/或第二致动销进行锁止,解决了双销制动异常造成的机构卡死、致动销折断、滑动槽崩坏等故障,以简单紧凑的结构实现致动销锁止和复位。(The invention provides a double-pin electromagnetic valve which comprises a valve shell, a guide shell connected with the valve shell, a first actuating pin, a second actuating pin, a locking mechanism and a reset mechanism, wherein the first actuating pin and the second actuating pin are telescopically displaced in the guide shell; the locking mechanism comprises a moving piece which is movably arranged on the guide shell; a first pull rod, the end part of which is respectively connected with the first actuating pin and the moving piece; the end part of the second pull rod is respectively connected with the second actuating pin and the moving piece; the reset mechanism is used for resetting the extension of the actuating pin. The first actuating pin and/or the second actuating pin are/is locked through the locking mechanism, so that the problems of mechanism jamming, actuating pin breaking, sliding groove collapse and the like caused by abnormal double-pin braking are solved, and the locking and resetting of the actuating pins are realized through a simple and compact structure.)

1. A double-pin solenoid valve comprising a valve housing (1), a guide housing (3) connected to the valve housing (1), and a first actuating pin (11a) and a second actuating pin (11b) telescopically displaceable within the guide housing (3);

wherein the first actuating pin (11a) is pushed by the first push rod (10a) under electromagnetic force, and the second actuating pin (11b) is pushed by the second push rod (10b) under electromagnetic force;

the device is characterized by further comprising a locking mechanism and a reset mechanism, wherein when the first actuating pin (11a) extends out, the locking mechanism locks the second actuating pin (11b), when the second actuating pin (11b) extends out, the locking mechanism locks the first actuating pin (11a), and when the first actuating pin and the second actuating pin extend out simultaneously, the locking mechanism locks the first actuating pin and the second actuating pin;

the locking mechanism includes:

a moving member (14) which is provided in the guide housing (3) and is movable in the guide housing (3);

a first pull rod (15a) having one end connected to the first actuating pin (11a) and the other end connected to the moving member (14);

a second pull rod (15b) connected at one end to the second actuating pin (11b) and at the other end to the moving member (14);

the resetting mechanism is used for resetting the first actuating pin (11a) and/or the second actuating pin (11 b).

2. The dual pin solenoid valve of claim 1, wherein the reset mechanism comprises: a fixed part (12) and a return spring (13) which are arranged in the valve shell (1), and two end parts of the return spring are respectively fixed on the fixed part (12) and the moving part (14).

3. The dual pin solenoid valve of claim 1, wherein the reset mechanism comprises: and the valve comprises a fixing piece (12) arranged in the valve shell (1), and a first return spring and a second return spring, wherein the end part of the first return spring is respectively fixed on the first actuating pin (11a) and the fixing piece (12), and the end part of the second return spring is respectively fixed on the second actuating pin (11b) and the fixing piece (12).

4. The double pin solenoid valve according to claim 1, characterized in that said return mechanism comprises a first return spring (13a) fixed at one end to said guide housing (3) and connected to a first actuating pin (11a), and a second return spring (13b) fixed at one end to said guide housing (3) and connected to a second actuating pin (11 b).

5. The dual pin solenoid valve of claim 1, wherein the reset mechanism comprises an electromagnetic drive assembly comprising reset permanent magnets disposed on the first and second actuating pins, respectively.

6. The double pin solenoid valve of any one of claims 1-5, a guide groove (31) for moving and guiding the moving piece (14) is arranged in the guide shell (3), the guide groove (31) comprises a first guide groove (316) and a second guide groove (315) which are symmetrically arranged, and the first guide slot (316) and the second guide slot (315) have a common slot end (311), the first actuating pin (11a) and the second actuating pin (11b) are locked when the moving member (14) is at the common slot end (311), when the moving member (14) is positioned at the other end (313) of the first guide groove (316), the first actuating pin (11a) is in the limit extending position, when the moving member (14) is at the other end (314) of the second guide groove (315), the second actuating pin (11b) is at the limit extending position.

7. The dual pin solenoid valve of claim 6, wherein the first guide slot (316) and the second guide slot (315) are both arcuate slots.

8. The double pin solenoid valve according to claim 7, wherein the first actuating pin (11a) has a first positioning boss (111a) connected to the end of the first pull rod (10a), and the second actuating pin (11b) has a second positioning boss (111b) connected to the end of the second pull rod (10 b).

9. A two-pin solenoid valve according to claim 7 or 8, wherein the fixed member (12) is a fixed pin and the moving member (14) is a moving pin.

Technical Field

The invention relates to the field of engine parts, in particular to a double-pin electromagnetic valve.

Background

The cam displacement type variable valve lift mechanism is a reliable mechanical structure, and realizes axial movement of a cam slider by matching an actuating pin of an electromagnetic valve with a sliding groove on a cam slider unit, so that cam molded lines with different lifts and wrap angles are matched for different working conditions of an engine, and the air inflow is controlled by controlling the opening size of a valve so as to meet the requirement of the engine on the oxygen amount under different working conditions, thereby improving the dynamic property and the economical efficiency of the engine.

The sliding groove of the cam slider of the cam shifting type variable valve lift mechanism is generally composed of two grooves, one groove is a go groove, and the other groove is a return groove. Theoretically, the double actuating pins of the solenoid valve can only fall into the sliding grooves of the cam slider at the same time to achieve a given axial displacement. When a software control fault, an electromagnetic valve coil is broken or an actuating pin is blocked, the actuating pin on one side is retained in the sliding groove and cannot return in time, the actuating pin on the other side is driven, the special condition that the actuating pins on two sides simultaneously extend into the sliding groove occurs at the moment, the two channels respectively generate displacement trends of going and returning, the mechanism is blocked along with the continuous rotation of the camshaft, the phenomena of breakage of the actuating pin, breakage of the sliding groove and the like are caused, the engine stop fault is seriously possibly caused, and further adverse results are brought.

In order to reduce the abnormal extension of the dual actuating pin of the solenoid valve, those skilled in the art have made many improvements on the hardware structure of the solenoid valve, for example, the patent document CN 206175775U discloses a dual-pin solenoid valve structure with an interlock function, which is equipped with a driving pin interlock structure, but has a major functional defect: the movable pin exerts great lateral force on the electromagnetic valve core shaft under the action of the return spring, so that the core shaft is easy to be blocked in the valve sleeve; the moving pin can be rigidly pushed by the mandrel in each reciprocating motion, so that the risks of large motion noise and abrasion exist; impact noise is generated when the lock is locked. For another example, CN206419076U discloses an electromagnetic actuator suitable for an engine cam shift system, which includes two independent push rods and two independent electromagnetic solenoid structures, and a hall sensor can be disposed at an asymmetric position of electromagnetic elements on two sides to detect the push rod shift, and has an automatic return function, but the structure does not have an interlock function between the drive pins of the electromagnetic valves, and cannot avoid the problem that the drive pins extend out simultaneously under specific conditions, and the hall sensor diagnosis can only monitor the working state of the drive pins, and cannot protect the hardware of the variable valve lift mechanism. Furthermore, for the control of the solenoid valve double actuation pins, it is more prone to prevent the actuation pins from being extended by mistake by software strategies to cope with this potential risk, while the control software risks system failure or crash restart, which leads to the problem that from time to time on the market, hardware damage still occurs.

Disclosure of Invention

In order to solve the above problems, the present invention provides a dual-pin solenoid valve, which can realize the interlocking and automatic reset functions of dual actuating pins, and has low noise and simple and reliable structure.

Specifically, the invention provides a double-pin electromagnetic valve which comprises a valve shell, a guide shell connected with the valve shell, a first actuating pin and a second actuating pin, wherein the first actuating pin and the second actuating pin are telescopically displaced in the guide shell;

wherein the first actuating pin is pushed by the first push rod under the electromagnetic action force, and the second actuating pin is pushed by the second push rod under the electromagnetic action force;

the locking mechanism locks the second actuating pin when the first actuating pin extends out, locks the first actuating pin when the second actuating pin extends out, and locks the first actuating pin and the second actuating pin when the first actuating pin and the second actuating pin extend out simultaneously;

the locking mechanism includes:

a moving member disposed in the guide housing and movable in the guide housing;

one end of the first pull rod is connected with the first actuating pin, and the other end of the first pull rod is connected with the moving piece;

one end of the second pull rod is connected with the second actuating pin, and the other end of the second pull rod is connected with the moving piece;

the reset mechanism is used for resetting the first actuating pin and/or the second actuating pin.

Further, the reset mechanism adopts single spring reset structure, includes: the two ends of the return spring are respectively fixed on the fixed piece and the moving piece.

Particularly, when the double-pin electromagnetic valve is in a non-working state, the position connecting line of the fixed part and the movable part is parallel to the axis of the double actuating pin. Through the structural arrangement, when the moving element is connected with the actuating pin through the pull rod, the force can be transmitted in a balanced manner, and the lateral force generated by the actuating pin of the electromagnetic valve is reduced, so that the additional abrasion of the lateral force to the actuating pin in the motion process of the actuating pin is avoided, and the fault that the actuating pin is broken or clamped in a certain middle position is effectively avoided.

As another embodiment, the return mechanism adopts a double-spring return structure, including: the end part of the first return spring is fixed on the first actuating pin and the fixing piece respectively, and the end part of the second return spring is fixed on the second actuating pin and the fixing piece respectively.

As still another embodiment, the double spring return structure of the return mechanism includes a first return spring having one end fixed to the guide housing and connected to the first actuating pin, and a second return spring having one end fixed to the guide housing and connected to the second actuating pin.

As another embodiment, the reset mechanism includes an electromagnetic driving assembly, and the electromagnetic driving assembly includes reset permanent magnets respectively disposed on the first actuating pin and the second actuating pin, and the reset permanent magnets are disposed at end portions of the two actuating pins and attached to lower ends of the two push rods.

Furthermore, a guide groove for moving and guiding the moving member is formed in the guide shell, the guide groove comprises a first guide groove and a second guide groove which are symmetrically arranged, the first guide groove and the second guide groove are provided with a common groove end, when the moving member is positioned at the common groove end, the first actuating pin and the second actuating pin are locked, when the moving member is positioned at the other end of the first guide groove, the first actuating pin is positioned at the limit extending position, and when the moving member is positioned at the other end of the second guide groove, the second actuating pin is positioned at the limit extending position.

Specifically, the first guide groove and the second guide groove are symmetrically arranged along a center line of a connecting line of the end parts of the two actuating pins.

Furthermore, the guide groove is also provided with a locking position, and the relation between the vertical distance H between the locking position and the common groove end and the displacement X when the first actuating pin and the second actuating pin extend out simultaneously is H less than or equal to 0.5X.

Furthermore, the guide groove and the second guide groove are both arc-shaped grooves.

Furthermore, the first actuating pin is provided with a first positioning boss connected with the end part of the first pull rod, and the second actuating pin is provided with a second positioning boss connected with the end part of the second pull rod.

Further, the fixed part is a fixed pin, and the moving part is a moving pin.

The double-pin electromagnetic valve provided by the invention can be applied to a driving cam displacement type variable valve lift mechanism. When one side of the actuating pin displaces, the pull rod connected with the other side of the actuating pin locks under the combined action of the moving piece, the guide groove and the reset mechanism, so that the interlocking function of the electromagnetic valve mechanism is realized. When the electromagnetic acting force on the actuating pin disappears, the resetting mechanism can enable the actuating pin to return to the initial position, and the resetting function is achieved.

Compared with the prior art, the double-pin electromagnetic valve provided by the invention has the following advantages:

the locking mechanism and the reset mechanism are arranged, so that the locking of the actuating pin of one of the two actuating pins can be realized independently, and the double actuating pins can be locked simultaneously when the double actuating pins extend out simultaneously, and the problems that when an electrical element fails, the double actuating pins extend out simultaneously and system hardware is damaged are effectively solved through the simple structure of the moving part and the pull rod;

the pull rod and the two actuating pins are used for realizing the force-transmitting moving element, so that the lateral force generated by the actuating pins of the solenoid valve is reduced, and the potential problems of clamping stagnation, NVH (noise vibration harshness) and abrasion of the actuating pins are optimized;

the double-pin electromagnetic valve is simple and reliable in structure and compact in arrangement.

Drawings

Fig. 1 is one of schematic internal structural diagrams of a double-pin solenoid valve according to embodiment 1 of the present invention;

fig. 2 is a second schematic diagram of an internal structure of a dual-pin solenoid valve provided in embodiment 1 of the present invention;

fig. 3 is a schematic diagram of a lock mechanism and a reset mechanism of a double-pin electromagnetic valve provided in embodiment 1 of the present invention in a reset and locked state;

fig. 4 is a schematic structural view of a guide groove provided in a guide housing of a two-pin solenoid valve according to embodiment 1 of the present invention;

FIG. 5 is a schematic view of a dual pin solenoid valve provided in embodiment 1 of the present invention in a state where a dual actuating pin is in an initial position;

FIG. 6 is a force analysis diagram of the dual actuator pin in the condition shown in FIG. 5;

fig. 7 is a schematic view of a double-pin solenoid valve according to embodiment 1 of the present invention in a state where a second actuator pin is extended;

FIG. 8 is a schematic view of a double pin solenoid valve according to embodiment 1 of the present invention, with the second actuator pin extended to the extreme position;

FIG. 9 is a force analysis schematic of the dual actuator pin in the condition of FIG. 8;

fig. 10 is a schematic view of a dual-pin solenoid valve according to embodiment 1 of the present invention, in which a first actuating pin extends to a position below a limit position;

FIG. 11 is a schematic diagram of a dual-pin solenoid valve provided in embodiment 1 of the present invention, with dual actuating pins extended and locked simultaneously;

fig. 12 is another schematic structural diagram of a dual actuating pin resetting mechanism of a dual-pin solenoid valve according to embodiment 2 of the present invention.

The figures of the drawings illustrate:

1. a valve housing; 2. a flange; 3. a guide housing; 4a, a first magnetic sleeve; 4b, a second magnetic sleeve; 5a, a first magnetic yoke sleeve; 5b, a second magnetic yoke sleeve; 6a, a first coil; 6b, a second coil; 7a, a first guide sleeve; 7b, a second guide sleeve; 8a, a first magnetic pole; 8b, a second magnetic pole; 9a, a first magnetic core; 9b, a second magnetic core; 10a, a first push rod; 10b, a second push rod; 11a, a first actuating pin; 11b, a second actuating pin; 111a, a first positioning boss; 111b and a second positioning boss; 12. a fixing member; 13. a return spring; 14. a moving member; 15a, a first pull rod; 15b, a second pull rod; 31. a guide groove; 311. a common slot end; 315. a second guide groove; 316. a first guide groove; 312. locking positions; 313. the other end of the first guide groove; 314. the other end of the second guide groove; l1, first displacement; l2, ultimate displacement; 13a, a first return spring; 13b, a second return spring; f1, initial pretightening force; fa. A first pull rod tension; fb. A second pull rod tension; theta b, the included angle between the pull force of the pull rod on the second actuating pin and the axis of the pin; theta, an included angle between the tension of the return spring and the tension of the second pull rod; F. the actual tension generated by the return spring.

Detailed Description

For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.

In the description of the present invention, it should be noted that, if the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. appear, the terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Example 1

As shown in fig. 1-2, a dual pin solenoid valve provided in embodiment 1 of the present invention includes a valve housing 1, a guide housing 3 fixedly connected to the valve housing 1 via a flange 2, a first actuating pin 11a and a second actuating pin 11b telescopically displaced in the guide housing 3, and a lock mechanism and a return mechanism, the lock mechanism locking the second actuating pin 11b when the first actuating pin 11a is extended, or locking the first actuating pin 11a when the second actuating pin 11b is extended, or locking the first and second actuating pins when the first and second actuating pins are simultaneously extended; specifically, the guide housing 3 is mounted on a protruding portion of the flange.

As further illustrated in connection with fig. 1 and 3, the locking mechanism includes:

a moving member 14 provided in the guide housing 3 and movable in the guide housing 3;

a first pull rod 15a, one end of which is connected with a first positioning boss 111a arranged on the first actuating pin 11a, and the other end of which is hinged with the moving piece 14;

a second pull rod 15b, one end of which is connected to a second positioning boss 111b provided on the second actuating pin 11b, and the other end of which is hinged to the moving member 14;

the resetting mechanism is used for realizing the extending resetting of the first actuating pin 11a and/or the second actuating pin 11b, and comprises: a fixed member 12 fixed in the valve housing 1, and a return spring 13, both ends of the return spring 13 being fixed to the fixed member 12 and the movable member 14, respectively.

Specifically, when the two-pin battery valve is in a non-operating state, i.e., in a power-off state of the two-pin solenoid valve, a connecting line between a center point of a connecting line of the first positioning boss 111a and the second positioning boss 111b and the moving member 14 is parallel to the axes of the two actuating pins.

Further, referring to fig. 2 again, the first actuating pin 11a is driven by the first push rod 10a under the action of the first electromagnetic driving mechanism, and the second actuating pin 11b is driven by the second push rod 10b under the action of the second electromagnetic driving mechanism.

The first electromagnetic driving mechanism and the second electromagnetic driving mechanism are symmetrically arranged in the valve housing 1, and specifically, the first electromagnetic driving mechanism comprises: install first magnetic core 9a in valve case 1, suit in the outside first yoke cover 5a of first magnetic core 9a, with the first uide bushing 7a of this first yoke cover 5a lower extreme contact, the cover is established at the first coil 6a outside this first yoke cover 5a, and with the first magnetic pole 8a of first flux sleeve 4a contact, first coil 6a is located first flux sleeve 4 a. The first push rod 10a mentioned above has a boss which snaps into the first magnetic pole 8 a. The first push rod 10a is used to transmit force and motion to the first actuating pin 11 a.

The second electromagnetic drive mechanism includes: a second magnetic core 9b installed in the valve housing 1, a second magnetic yoke sleeve 5b sleeved outside the second magnetic core 9b, a second guiding sleeve 7b contacting with the lower end of the second magnetic yoke sleeve 5b, a second coil 6b sleeved outside the second magnetic yoke sleeve 5b, and a second magnetic pole 8b contacting with the second magnetic yoke sleeve 4b, further referring to fig. 1, the second coil 6b is located in the second magnetic yoke sleeve 4 b. The above-mentioned second pusher 10b has a boss which snaps into the second pole 8 b. The second push rod 10b is used to transmit force and motion to the second actuating pin 11 b.

As shown in fig. 4, the moving member 14 of the lock mechanism is constrained by a guide groove 31 provided in the guide housing 3. Specifically, the guide groove 31 includes a first guide groove 316 and a second guide groove 315, which are both arc-shaped and symmetrically disposed, and the first guide groove 316 and the second guide groove 31 have a common groove end 311, when the moving member 14 is located at the common groove end 311, the first actuating pin 11a and the second actuating pin 11b are locked, when the moving member 14 is located at the other end 313 of the first guide groove 316, the first actuating pin 11a is in the limit extension position, and when the moving member 14 is located at the other end 314 of the second guide groove 315, the second actuating pin 11b is in the limit extension position.

With reference to fig. 1-4, the locking structure is composed of a moving member 14 and pull rods 15a and 15b, wherein the pull rods 15a and 15b are independent parts and are respectively hinged on the moving member 14, and the pull rods 15a and 15b can rotate relatively around the moving member 14.

Initial state, as illustrated in fig. 5: the first coil 6a and the second coil 6b are not electrified and do not generate electromagnetic force, the first magnetic core 9a and the second magnetic core 9b do not displace, the return spring 13 is in an installation state, at this time, the moving member 14 is located at the common slot end 311 of the first guide slot 316 and the second guide slot 315, the moving member 14 presses the first actuating pin 11a and the second actuating pin 11b at the upper stop position through the first pull rod 15a and the second pull rod 15b, respectively, and the first actuating pin 11a and the second actuating pin 11b correspondingly press the first guide rod 10a and the second guide rod 10b and the first magnetic core 9a and the second magnetic core 9b at the upper stop position.

When the dual actuating pins are in the initial state shown in fig. 5, and the force analysis of fig. 6 is combined, the return spring 13 has an initial pre-tightening force F1, and the first pull rod 15a and the second pull rod 15b are symmetrical, and both the two actuating pins are pulled by the corresponding pull rods. Where fa is the first tie pull force and fb is the second tie pull force. At this time, with the second actuator pin 11b as the analysis target, the lateral force applied to the second actuator pin 11b is F1 × cos (θ) × sin (θ b), and the biasing force F1 of the return spring 13 in the initial position is small, so that the lateral force applied to the second actuator pin 11b is small.

In connection with the schematic view of the extended state of the second actuating pin 11b of fig. 7: at this time, the first coil 6a is not electrified, and the first magnetic core 9a, the first guide rod 10a and the first actuating pin 11a are correspondingly all at the upper stop position; the second coil 6b is energized, a loop is formed among the second flux sleeve 4b, the second yoke sleeve 5b, the second guide sleeve 7b and the second magnetic pole 8b by a formed electromagnetic field, the second magnetic core 9b is driven to move downwards, so that the second guide rod 10b is pushed to generate downward displacement, the second guide rod 10b further pushes the second actuating pin 11b to extend downwards, the first displacement L1 occurs on the second actuating pin 11b, the displacement of the second positioning boss 111b thereon drives the connected second pull rod 15b to move, and further drives the moving member 14 to move from the common slot end 311 to the other end 314 of the second guide slot 315, and at this time, the return spring 13 is in a stretching state.

On the basis of fig. 7, further illustrated in connection with fig. 8: when the second magnetic core 9b continues to move downwards and finally reaches the limit position of the second magnetic pole 8b, the second guide rod 10b and the second actuating pin 11b pushed by the second magnetic core reach the limit displacement L2, and correspondingly, the moving member 14 also reaches the other end 314 of the second guide slot 315, and the return spring 13 is in the maximum tension state, which provides an assisting force for returning the second actuating pin 11 b.

Based on fig. 7 and 8, in combination with the force analysis of fig. 9, when the second actuator pin 11b is driven and moves downward, the lateral force is F2 × (θ) × sin (θ b), and both θ and θ b are very small, then cos (θ) → 1 and sin (θ b) → 0, and the lateral force fb is very small, where θ b is the angle between the pull rod tension force applied to the second actuator pin 11b and the pin axis, and θ is the angle between the actual tension force F generated by the return spring and the second pull rod tension force fb.

When the second actuating pin 11b is in any position between the initial position shown in FIG. 5 and the extreme extended position shown in FIG. 8 (which may be defined as a transition position), the initial preload force F1 < F2, cos (θ) E (0,1), sin (θ b) E (0,1), and the lateral force fb will be at a maximum.

The double-pin electromagnetic valve provided by the invention is constructed by utilizing a triangular relation, so that a small part of the pulling force of the return spring becomes lateral force, the majority of the pulling force is the return spring force in the vertical direction, the abrasion loss caused by the lateral force is similar to the integral value of normal distribution, and the moving abrasion of the actuating pin is greatly reduced.

The same can be understood in connection with the above description, the process of extending the first actuating pin 11a to the extreme position, the state diagram of which is illustrated in fig. 10.

The resetting process of the second actuating pin 11b is as follows: the second coil 6b is powered off, the electromagnetic force driving the second magnetic core 9b to move downwards disappears, at this time, due to the elastic force of the return spring 13, the second actuating pin 11b generates upward displacement and pushes the second guide rod 10b and the second magnetic core 9b to move upwards, the second pull rod 15b moves upwards along with the return of the second actuating pin 11b, and further drives the moving member 14 to move from the position of the other end 314 of the second guide slot 315 to the position of the common slot end 311, when the second magnetic core 9b moves to the upper stop position, the moving member 14 also moves to the position of the common slot end 311, at this time, the second actuating pin 11b is also at the upper stop position, and the whole double-pin electromagnetic valve is at the initial position;

the process of resetting the first actuating pin 11a can be understood in the same way, and will not be described in detail here.

With the understanding of the dual actuator pin extension and return process, the following description of the process of locking the actuator pin by the locking mechanism follows:

the second actuation pin 11b is extended, the first actuation pin 11a is in the initial position and locked: when the second coil 6b is activated and the second actuating pin 11b is in the extended state, the second pull rod 15b of the locking mechanism pulls the moving member 14 to be located in the second guide groove 315, and at this time, if the first coil 6a is activated, the corresponding first actuating pin 11a will also have a tendency to move downward, and the moving member 14 will have a tendency to move toward the other end 313 of the first guide groove 316, and at this time, will drive the second actuating pin 11b to move upward, which is contrary to the original extended state of the second actuating pin 11b, so that when the second actuating pin 11b is extended, the first actuating pin 11a is always in the locked state.

Similarly, it can be understood that the description of the state that the second actuating pin 11b is always in the initial position and locked when the first actuating pin 11a is extended is omitted.

With reference to the schematic diagram of the simultaneous extension and locking of the dual actuator pins of fig. 11: when the first coil 6a and the second coil 6b are simultaneously activated, the first magnetic core 9a and the second magnetic core 9b correspondingly push the first push rod 10a, the first push rod 10b, the first actuating pin 11a and the second actuating pin 11b to simultaneously move downwards, at this time, the locking mechanism integrally moves downwards, when the moving member 14 runs to the locking position 312, at this time, the moving member 14 cannot move downwards any more, the first pull rod 15a and the second pull rod 15b connected with the moving member stop moving downwards, at this time, the first actuating pin 11a, the second actuating pin 11b, the first push rod 10a, the second push rod 10b, the first magnetic core 9a and the second magnetic core 9b cannot move downwards, and the first actuating pin and the second actuating pin are simultaneously extended and locked; with reference to the orientation shown in FIG. 4 and the orientation shown in the drawings, the locking position 312 is located below the common slot end 311, and has a vertical height difference H therebetween, which depends on the simultaneous extension displacement X of the dual actuator pins, generally H ≦ 0.5X.

Specifically, the above-mentioned fixed member 12 may be a fixed pin, and the movable member 14 may be a movable pin, but is not limited thereto.

The double-pin electromagnetic valve provided by the invention has the advantages that the structure is simple and reliable, the arrangement is compact, the double-pin electromagnetic valve has the locking and resetting functions of the actuating pins, the problem that the double actuating pins extend out simultaneously and the system hardware is damaged when an electrical element fails is effectively solved by arranging the locking mechanism, when one of the actuating pins extends out, the locking mechanism locks the other actuating pin, and if the two actuating pins extend out simultaneously, the double actuating pins are locked simultaneously, the faults of mechanism locking, actuating pin breaking, sliding groove breaking and the like caused by abnormal double-pin braking are solved, and the control of the electromagnetic valve mechanism on the variable valve lift mechanism is improved; and the locking mechanism realizes the moving part of force transmission through the pull rod and the two actuating pins, reduces the lateral force generated by the actuating pins of the electromagnetic valve, optimizes the potential problems of jamming, NVH and abrasion of the actuating pins, and simultaneously, the resetting mechanism can realize the extension resetting of the actuating pins.

Example 2

As shown in fig. 12, the present embodiment 2 provides a two-pin solenoid valve structure different from that of embodiment 1 only in the return mechanism. In this embodiment, the return mechanism has a double return spring structure, and includes a first return spring 13a having one end fixed to the guide housing 3 and fixed to the first actuating pin 11a, and a second return spring 13b having one end fixed to the guide housing 3 and fixed to the second actuating pin 11 b. The same structure as that of embodiment 1 will not be described again.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

The technical means disclosed in the invention scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and such improvements and modifications are also considered to be within the scope of the present invention.