Valve regulator with constant holding force

Abstract

The utility model discloses a constant valve adjusting valve of keeping force, it includes valve body, magnetic shaft sleeve, guide rod subassembly and electromagnetic induction subassembly, the valve body is opened with valve cavity, and the magnetic shaft sleeve fixedly arranged in one end of valve body, guide rod subassembly includes guide rod and fixedly set permanent magnet on guide rod, and the permanent magnet and the one end of guide rod movably accommodate in the valve cavity, and the other end of guide rod passes through the magnetic shaft sleeve and stretches out outward, electromagnetic induction subassembly includes electromagnetic coil, coil skeleton, core, jacks and elastic structure, and the electromagnetic coil is around set up on coil skeleton, and coil skeleton is fixedly set in the valve body, and the core is accommodated in coil skeleton, and the one end of core near guide rod is opened with the accommodation cavity, and the jacks are elastically accommodated in the accommodation cavity through elastic structure, and the one end of jacks is towards the valve cavity and is corresponding with guide rod setting. The structure design avoids the core subsidence, avoids the core and guide rod to form the vacuum in the oil environment, ensures product magnetic circuit clearance, ensures product shrink state keeping force constant.

Description

Technical Field

[0001] This utility model relates to the field of valve control valves, and more particularly to a valve control valve with constant holding force. Background Technology

[0002] Currently, the first and second generation of automotive engine valve control valves use a guide rod in contact with an iron core. The iron core requires a high-permeability free-cutting steel, 11SMnPb30, which is relatively soft. The guide rod contacts the cam during operation and requires surface heat treatment to achieve a hardness >800HV / 0.1 and a thickness >24μm. Therefore, after repeated high-temperature (harsh environment) operation, the iron core of the AVS actuator may sink. This sinking can lead to two consequences: 1. A sinking iron core reduces the magnetic circuit gap between the iron core and the permanent magnet, resulting in a decrease in the holding force when the product is retracted. Under vibration conditions, the guide rod may unexpectedly extend, causing engine failure. 2. A sinking iron core, in the presence of engine oil, can easily create a vacuum between the iron core and the guide rod, preventing the guide rod from extending when the solenoid coil is energized, thus rendering the control valve ineffective.

[0003] In addition, during the frequent up-and-down movement of the guide rod, the permanent magnet on the guide rod is also easily broken due to impact.

[0004] Therefore, considering the aforementioned technical problems, it is necessary to provide a new technical solution. Utility Model Content

[0005] To at least address one of the technical problems existing in the prior art, this utility model provides a valve regulating valve with constant holding force. This valve prevents the iron core from sinking, avoids the formation of a vacuum between the iron core and the guide rod in the engine oil environment, ensures the magnetic circuit clearance of the product, and ensures a constant holding force in the compressed state, resulting in stable and durable performance. The specific technical solution is as follows:

[0006] This utility model provides a valve regulating valve with constant holding force, which includes a valve body, a magnetic bushing, a guide rod assembly and an electromagnetic induction assembly;

[0007] The valve body has a valve cavity, and a magnetic bushing is fixedly installed at one end of the valve body. The inner cavity of the magnetic bushing is connected to the valve cavity.

[0008] The guide rod assembly includes a guide rod and a permanent magnet. The permanent magnet is fixedly connected to the guide rod. The permanent magnet and one end of the guide rod near the permanent magnet are movably housed in the valve cavity. The other end of the guide rod passes through the magnetic bushing and extends outward.

[0009] The electromagnetic induction assembly includes an electromagnetic coil, a coil frame, an iron core, a push rod, and an elastic structure. The electromagnetic coil is wound on the coil frame, which is fixedly installed inside the valve body. The iron core is housed within the coil frame, and a receiving cavity is provided at one end of the iron core near the guide rod. The push rod is elastically housed within the receiving cavity through the elastic structure, with one end of the push rod facing the valve cavity and corresponding to the guide rod.

[0010] As a preferred embodiment of the valve regulating valve described in this utility model, the end face of the push rod near the guide rod is an outwardly convex arc surface.

[0011] As a preferred embodiment of the valve regulating valve described in this utility model, the elastic structure is a spring, which is sleeved on the push rod. A spring groove is also provided in the iron core. The spring groove is connected to and coaxially arranged with the receiving cavity. One end of the spring is fixedly connected to the push rod, and the other end of the spring abuts against the bottom of the spring groove.

[0012] As a preferred embodiment of the valve regulating valve described in this utility model, the guide rod assembly further includes a lower cover and an upper cover. The lower cover, the permanent magnet, and the upper cover are sequentially fitted onto the guide rod. The lower cover is located on the side of the permanent magnet away from the electromagnetic induction component, and the upper cover covers the permanent magnet.

[0013] As a preferred embodiment of the valve regulating valve described in this utility model, the upper cover covers the circumferential surface of the permanent magnet and the other side, one end of the upper cover is fixedly connected to the guide rod, and the other end of the upper cover abuts against the lower cover.

[0014] As a preferred embodiment of the valve regulating valve described in this utility model, both the lower cover and the upper cover are connected to the guide rod by laser welding.

[0015] As a preferred embodiment of the valve regulating valve described in this utility model, the receiving cavity is an opening at both ends, and the other end of the push rod can extend out of the receiving cavity.

[0016] As a preferred embodiment of the valve regulating valve described in this utility model, the upper cover is a steel upper cover and the lower cover is a steel lower cover.

[0017] As a preferred embodiment of the valve regulating valve described in this utility model, the valve body has two valve chambers, and each valve chamber is provided with a magnetic bushing, a guide rod assembly and an electromagnetic induction assembly.

[0018] Compared with the prior art, the technical solution of this utility model has at least one or more of the following beneficial effects:

[0019] This patented design incorporates a push rod and spring embedded within the iron core. The spring cushions the impact of the guide rod, while the SUS303 material push rod absorbs the impact, preventing the iron core from collapsing and avoiding a vacuum between the iron core and guide rod in the oil environment. This ensures a stable magnetic circuit clearance, thereby guaranteeing stable holding force in the compressed state of the AVS actuator and increasing product durability. During valve operation, the guide rod continuously moves up and down, striking the push rod within the iron core, achieving a durability of at least 1.5 million cycles.

[0020] The push rod is designed with an arc surface, ensuring that the guide rod and the push rod are always in point-to-surface contact, without surface-to-surface contact. This effectively prevents the guide rod and the iron core from forming a vacuum in the oil, avoiding functional failures such as the guide rod failing to extend when the electromagnetic coil is energized.

[0021] The spring can reduce the impact on the guide rod and also prevent the permanent magnet on the guide rod from breaking due to the impact.

[0022] The upper and lower covers are designed to protect the permanent magnets from damage.

[0023] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a cross-sectional view of the valve regulating valve described in this utility model.

[0026] Among them, 1-valve body, 2-magnetic bushing, 11-valve cavity, 31-guide rod, 32-permanent magnet, 33-lower cover, 34-upper cover, 41-electromagnetic coil, 42-coil frame, 43-iron core, 44-top rod, 45-elastic structure. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0028] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "provided with," "equipped with," "connected," "installed," "sleeved," "opened," and "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

[0031] Please refer to Figure 1 ,like Figure 1 As shown, this utility model provides a valve regulating valve with constant holding force, which includes a valve body 1, a magnetic bushing 2, a guide rod assembly and an electromagnetic induction assembly;

[0032] The valve body 1 has a valve cavity 11, and the magnetic bushing 2 is fixedly installed at one end of the valve body. The inner cavity of the magnetic bushing 2 is connected to the valve cavity 11.

[0033] The guide rod assembly includes at least a guide rod 31 and a permanent magnet 32. The permanent magnet 32 ​​is fixedly connected to the guide rod 31. The permanent magnet 32 ​​and one end of the guide rod 31 near the permanent magnet are movably housed in the valve cavity. The other end of the guide rod 31 passes through the magnetic bushing 2 and extends outward.

[0034] The electromagnetic induction assembly includes an electromagnetic coil 41, a coil frame 42, an iron core 43, a push rod 44, and an elastic structure 45. The electromagnetic coil 41 is wound on the coil frame 42, which is fixedly installed inside the valve body 1. The iron core 43 is housed inside the coil frame 42, and a receiving cavity is opened at one end of the iron core 43 near the guide rod. The push rod 44 is elastically housed in the receiving cavity through the elastic structure 45, and one end of the push rod 44 faces the valve cavity 11 and is correspondingly arranged with the guide rod 31.

[0035] In the example, when the guide rod 31 moves toward the push rod 44, it comes into contact with the push rod 44, but the guide rod 31 does not come into contact with the iron core 43.

[0036] In the example, the push rod is 44, which is a push rod made of SUS303 material.

[0037] The actuator employs a push rod and spring embedded within the iron core. The spring cushions the impact of the guide rod, while the push rod (SUS303) absorbs the impact, preventing the iron core from collapsing and avoiding a vacuum between the iron core and guide rod in the oil environment. This ensures a stable magnetic circuit clearance, thereby guaranteeing stable holding force in the compressed state and increasing product durability. During valve operation, the guide rod continuously moves up and down, striking the push rod within the iron core, achieving a durability of at least 1.5 million cycles.

[0038] The spring can reduce the impact on the guide rod and also prevent the permanent magnet on the guide rod from breaking due to the impact.

[0039] In the example, the coil frame 42 is fixedly disposed within the valve body 1, and the iron core 43, the push rod 44, and the elastic structure 45 are movably accommodated within the coil frame 42. In the example, the coil frame 42 has a receiving hole along the axial direction, the iron core 43 is accommodated within the receiving hole, and the iron core 43 and the push rod 44 can move along the axial direction of the guide rod 31.

[0040] In a preferred embodiment, such as Figure 1 As shown, the end face of the push rod 44 near the guide rod 31 is a convex arc surface. The arc surface of the push rod ensures that the guide rod and the push rod are always in point-to-surface contact, without surface-to-surface contact. This effectively prevents the guide rod and the iron core from forming a vacuum in the oil, avoiding functional failures such as the guide rod failing to extend when the electromagnetic coil is energized.

[0041] In a preferred embodiment, the elastic structure 45 is a spring, which is sleeved on the top rod 44. A spring groove is also provided in the iron core 43. The spring groove is connected to and coaxially arranged with the receiving cavity. The spring groove is opened on the side wall of the receiving cavity. One end of the spring is fixedly connected to the top rod 44, and the other end of the spring abuts against the bottom of the spring groove.

[0042] In a preferred embodiment, the guide rod assembly further comprises a lower cover 33 and an upper cover 34, the lower cover 33, the permanent magnet 32 and the upper cover 34 are sequentially sleeved on the guide rod 31, the lower cover 33 is located on a side of the permanent magnet 32 away from the electromagnetic induction assembly, and the upper cover 34 covers the permanent magnet 32. In an example, the upper cover 34 covers the circumferential surface and the other side of the permanent magnet 32, one end of the upper cover 34 is fixedly connected with the guide rod 31, and the other end of the upper cover 34 abuts against the lower cover 33. In an example, both the upper cover and the lower cover are made of rigid material. In an example, both the lower cover 33 and the upper cover 34 are welded to the guide rod 31 by laser welding. The upper cover and the lower cover are provided to protect the permanent magnet from damage.

[0043] In an example, the lower cover 33, the permanent magnet 32 and the upper cover 34 are disposed at an end of the guide rod 31 close to the ejector rod 44. Preferably, an end face of the guide rod 31 close to the upper cover 34 is higher than a surface of the upper cover 34.

[0044] Preferably, the accommodating cavity is a accommodating cavity with openings at both ends, and the other end of the ejector rod 44 can extend out of the accommodating cavity.

[0045] When the technical solution is used, when the regulating valve is not energized, the guide rod 31 of the regulating valve is attracted to the magnetic shaft sleeve 2 under the action of permanent magnetic force (i.e., the permanent magnet 32), the attraction force is referred to as F2, and at this time the other end of the guide rod 31 extends out of the magnetic shaft sleeve to work. Since the camshaft regulating device will exert an upward thrust F1 (that is, a thrust toward the ejector rod and the iron core) on the guide rod 31 of the actuator when rotating, the guide rod 31 will move along the axial direction toward the iron core (that is, the guide rod retracts). When the guide rod 31 initially retracts, the permanent magnet on the guide rod 31 and the iron core 43 generate an attraction force F3, and F2>F3; as the thrust F1 continuously increases, the guide rod 31 continues to move toward the iron core, F2 gradually decreases and F3 gradually increases until the guide rod 31 continues to move to a position where F2<F3, under the action of the permanent magnet 32, the guide rod 31 is attracted to the iron core 43, at this time the guide rod 31 is in contact with the ejector rod 44, and the iron core 43 is not in contact with the guide rod 31, as Figure 1 described in the state of the guide rod on the right side. In the regulating valve of this example, when the guide rod 31 retracts by about 2.0 mm, F2<F3.

[0046] When the regulating valve is energized, the electromagnetic coil 41 of the regulating valve generates a magnetic field, the polarity of the magnetic field is the same as that of the permanent magnet 32, generating a repulsive force F4, so that the guide rod 31 of the regulating valve moves in a direction away from the iron core under the action of the repulsive force F4, until the permanent magnet 32 on the guide rod 31 is attracted to the magnetic shaft sleeve 2, as Figure 1As described in the example of the guide rod on the left, as the guide rod 31 moves away from the iron core under the action of the repulsive force F4, the attraction force F2 between the permanent magnet 32 ​​and the magnetic bushing also accelerates the downward movement of the guide rod 31. As the guide rod 31 moves downward, F4 gradually decreases and F2 gradually increases, but the total force of F3+F2 remains basically unchanged.

[0047] In a preferred embodiment, two valve chambers 11 may be provided on the valve body. Each valve chamber 11 is provided with a magnetic bushing 2, a guide rod assembly and an electromagnetic induction assembly. The specific structure is described above and will not be repeated here.

[0048] It should be noted that, without conflict, all features in the above embodiments or embodiments described herein can be freely combined.

[0049] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "yet another embodiment," "another embodiment," "other embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0050] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications and variations to the above embodiments within the scope of the present invention.

Claims

1. A valve regulating valve with constant holding force, characterized in that, It includes a valve body (1), a magnetic bushing (2), a guide rod assembly, and an electromagnetic induction assembly; The valve body has a valve cavity (11), and a magnetic bushing (2) is fixedly installed at one end of the valve body. The inner cavity of the magnetic bushing (2) is connected to the valve cavity (11). The guide rod assembly includes a guide rod (31) and a permanent magnet (32). The permanent magnet (32) is fixedly connected to the guide rod (31). The permanent magnet (32) and the guide rod (31) are movably housed in the valve cavity at one end near the permanent magnet. The other end of the guide rod (31) passes through the magnetic bushing (2) and extends outward. The electromagnetic induction assembly includes an electromagnetic coil (41), a coil frame (42), an iron core (43), a push rod (44), and an elastic structure (45). The electromagnetic coil (41) is wound on the coil frame (42), and the coil frame (42) is fixedly installed inside the valve body (1). The iron core (43) is housed inside the coil frame (42), and a receiving cavity is opened at one end of the iron core (43) near the guide rod. The push rod (44) is elastically housed in the receiving cavity through the elastic structure (45). One end of the push rod (44) faces the valve cavity (11) and is correspondingly arranged with the guide rod (31).

2. The valve regulating valve according to claim 1, characterized in that, The end face of the top rod (44) near the guide rod (31) is a convex arc surface.

3. The valve regulating valve according to claim 1, characterized in that, The elastic structure (45) is a spring, which is sleeved on the top rod (44). A spring groove is also provided in the iron core (43). The spring groove is connected to the accommodating cavity and is coaxially arranged. One end of the spring is fixedly connected to the top rod (44), and the other end of the spring abuts against the bottom of the spring groove.

4. The valve regulating valve according to claim 1, characterized in that, The guide rod assembly also includes a lower cover (33) and an upper cover (34). The lower cover (33), the permanent magnet (32) and the upper cover (34) are sequentially fitted onto the guide rod (31). The lower cover (33) is located on the side of the permanent magnet (32) away from the electromagnetic induction component, and the upper cover (34) covers the permanent magnet (32).

5. The valve regulating valve according to claim 4, characterized in that, The upper cover (34) covers the circumferential surface of the permanent magnet (32) and the other side. One end of the upper cover (34) is fixedly connected to the guide rod (31), and the other end of the upper cover (34) abuts against the lower cover (33).

6. The valve regulating valve according to claim 4, characterized in that, Both the lower cover (33) and the upper cover (34) are connected to the guide rod (31) by laser welding.

7. The valve regulating valve according to claim 1, characterized in that, The receiving cavity is an open cavity at both ends, and the other end of the push rod (44) can extend out of the receiving cavity.

8. The valve regulating valve according to claim 6, characterized in that, The upper cover is made of steel, and the lower cover is made of steel.

9. The valve regulating valve according to any one of claims 1-8, characterized in that, The valve body has two valve chambers (11), and each valve chamber (11) is provided with a magnetic bushing (2), a guide rod assembly and an electromagnetic induction assembly.

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