A proportional solenoid with pre-tension adjustment function

Abstract

This utility model discloses a proportional electromagnet with preload adjustment function, belonging to the field of hydraulic technology. The proportional electromagnet includes a shell, a coil assembly, a tail yoke, an armature assembly, and an adjustment assembly. The shell includes an integrally formed shell body and a front yoke, with an opening at the end of the shell body opposite to the front yoke. The tail yoke is disposed within the shell body and is positioned opposite the front yoke. The coil assembly is disposed within the shell body and surrounds the front yoke and tail yoke. The armature assembly includes an armature and a push rod connected to the armature. The armature can move relative to the tail yoke when the coil assembly is energized, simultaneously driving the push rod to move relative to the front yoke. The adjustment assembly includes an adjustment seat, an adjustment rod, and an adjustment spring. The adjustment seat is installed at the opening of the shell body, and the adjustment rod is axially adjustable on the adjustment seat. The two ends of the adjustment spring respectively abut against one end of the adjustment rod and the armature. The proportional electromagnet can meet the needs of various working conditions, has strong versatility, is easy to process, and has high assembly efficiency.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic technology, specifically to a proportional electromagnet with preload adjustment function. Background Technology

[0002] Proportional electromagnets are an important component of proportional valves. Under the action of proportional electromagnets, proportional valves can achieve proportional control of parameters such as pressure and flow rate in hydraulic systems. Proportional control is achieved by changing the current value passed through the coil inside the proportional electromagnet through the controller to control the movement distance of the valve core, thereby changing the opening of the proportional valve orifice and realizing proportional control.

[0003] A proportional electromagnet typically includes a housing, a front yoke, a tail yoke, a coil assembly, an armature, and a push rod. When current flows through the coil assembly, a circular magnetic field is generated along the housing, front yoke, and tail yoke. Under the influence of this circular magnetic field, the armature can move along its own axis, simultaneously driving the push rod connected to the armature to move synchronously, causing the push rod to extend out of the housing and trigger the switch of an external actuator. However, proportional electromagnets in related technologies often have the following problems: 1) The force is constant and unadjustable at a certain current or voltage, making it unsuitable for use under various different operating conditions and resulting in poor versatility; 2) The housing and front yoke are usually designed as separate units, which are inconvenient to manufacture and have low assembly efficiency.

[0004] Therefore, there is an urgent need for a proportional electromagnet with preload adjustment function to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a proportional electromagnet with preload adjustment function, which can meet the needs of various working conditions, has strong versatility, is easy to process, and has high assembly efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A proportional electromagnet with preload adjustment function includes:

[0008] The outer shell includes an integrally formed shell body and a front yoke, wherein the shell body has an opening at one end opposite to the front yoke;

[0009] A tail yoke is disposed within the shell body, and the tail yoke is disposed opposite to the front yoke;

[0010] A coil assembly is disposed within the shell body and surrounds the front yoke and the tail yoke;

[0011] An armature assembly includes an armature and a push rod connected to the armature. The armature is movably inserted into the tailstock. The end of the push rod opposite to the armature passes through the front yoke. The armature can move relative to the tailstock when the coil assembly is energized, and at the same time, it drives the push rod to move relative to the front yoke.

[0012] The adjustment assembly includes an adjustment seat, an adjustment rod, and an adjustment spring. The adjustment seat is installed at the opening of the shell body. The adjustment rod is axially adjustable on the adjustment seat. The two ends of the adjustment spring abut against one end of the adjustment rod and the armature, respectively. The other end of the adjustment rod extends out of the shell body.

[0013] As a preferred embodiment of the proportional electromagnet with preload adjustment function provided by this utility model, the adjusting rod is a screw rod, and the screw rod is threadedly connected to the adjusting seat.

[0014] As a preferred embodiment of the proportional electromagnet with preload adjustment function provided by this utility model, the adjustment assembly further includes a fixing nut, which is screwed onto the end of the adjustment rod that extends out of the housing body and can abut against the adjustment seat.

[0015] As a preferred embodiment of the proportional electromagnet with preload adjustment function provided by this utility model, the armature is provided with a receiving groove, and the adjusting spring is at least partially received in the receiving groove.

[0016] As a preferred embodiment of the proportional electromagnet with preload adjustment function provided by this utility model, the push rod is provided with a limiting member, which can abut against the front yoke to limit the maximum displacement of the armature assembly.

[0017] As a preferred embodiment of the proportional electromagnet with preload adjustment function provided by this utility model, the limiting component is a limiting washer; or the limiting component is a limiting nut.

[0018] As a preferred embodiment of the proportional electromagnet with preload adjustment function provided by this utility model, the end of the front yoke facing the tail yoke is provided with a guide groove, and the end of the armature away from the tail yoke is guided and fitted into the guide groove.

[0019] And / or, the end of the anterior yoke facing the tail is frustoconical.

[0020] As a preferred embodiment of the proportional electromagnet with preload adjustment function provided by this utility model, the proportional electromagnet with preload adjustment function further includes a plug assembly, which is configured to supply power to the coil assembly.

[0021] As a preferred embodiment of the proportional electromagnet with preload adjustment function provided by this utility model, the plug assembly includes:

[0022] The socket includes a fixed part and an annular mounting part connected to each other. The fixed part is disposed on the side of the housing body and has an electrical connector for connecting to an external power source. The annular mounting part is located in the housing body and between the adjusting seat and the tailstock.

[0023] A pin is disposed on the annular mounting portion, and the pin is electrically connected to the terminal of the coil assembly.

[0024] As a preferred embodiment of the proportional electromagnet with preload adjustment function provided by this utility model, the plug assembly includes:

[0025] The socket is ring-shaped and is disposed in the housing body, located between the adjustment seat and the tailstock;

[0026] A pin is disposed on the socket, and the pin is electrically connected to the terminal of the coil assembly;

[0027] Connect the lead wire to the socket and it can be electrically connected to an external power source.

[0028] The beneficial effects of this utility model are as follows:

[0029] This utility model provides a proportional electromagnet with preload adjustment function. By setting an adjustment component, the operator can change the preload force of the adjusting spring acting on the armature by adjusting the position of the adjusting rod relative to the adjusting seat. This changes the magnitude of the force exerted by the proportional electromagnet at a certain current or voltage, achieving adjustable force for a specific current or voltage. This makes it suitable for various working conditions with different force requirements, improving the versatility of the proportional electromagnet. By extending the adjusting rod out of the housing body from the adjusting spring end, it is convenient for the operator to adjust the adjusting rod. By making the housing body and the front yoke an integrally molded structure, the processing steps of the housing are simplified, eliminating the assembly step between the two, thereby improving the assembly efficiency of the proportional solenoid valve. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model 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 the content of the embodiments of this utility model and these drawings without creative effort.

[0031] Figure 1This is a cross-sectional view of a proportional electromagnet with preload adjustment function provided in Embodiment 1 of this utility model;

[0032] Figure 2 This is a cross-sectional view of the outer shell provided in Embodiment 1 of this utility model;

[0033] Figure 3 This is a cross-sectional view of the adjustment assembly and armature assembly provided in Embodiment 1 of this utility model;

[0034] Figure 4 This is a schematic diagram of the structure of the limiting member provided in Embodiment 1 of this utility model;

[0035] Figure 5 This is a schematic diagram of the coil assembly provided in Embodiment 1 of this utility model;

[0036] Figure 6 yes Figure 5 A magnified view of a portion at point A;

[0037] Figure 7 This is a schematic diagram of the plug assembly provided in Embodiment 1 of this utility model;

[0038] Figure 8 This is a cross-sectional view of the proportional electromagnet with preload adjustment function provided in Embodiment 2 of this utility model;

[0039] Figure 9 This is a schematic diagram of the structure of the limiting member provided in Embodiment 2 of this utility model;

[0040] Figure 10 This is a cross-sectional view of the proportional electromagnet with preload adjustment function provided in Embodiment 3 of this utility model;

[0041] Figure 11 This is a schematic diagram of the plug assembly provided in Embodiment 3 of this utility model.

[0042] Figure label:

[0043] 10. Outer shell; 11. Shell body; 110. Opening; 12. Front yoke; 121. Through hole; 122. Guide groove;

[0044] 20. Plug assembly; 21. Socket; 211. Fixing part; 212. Ring mounting part; 22. Pin; 23. Connecting lead wire;

[0045] 30. Coil assembly; 31. Coil frame; 310. Mounting hole; 32. Enamelled wire; 321. Terminal; 33. Inner liner; 331. First conical sealing surface; 332. Second conical sealing surface;

[0046] 40. Wei E;

[0047] 50. Armature assembly; 51. Armature; 511. Receiving slot; 512. Insertion hole; 52. Push rod; 521. Limiting component;

[0048] 61. First seal; 62. Second seal; 63. Third seal; 64. Fourth seal;

[0049] 70. Adjustment component; 71. Adjustment seat; 72. Adjustment rod; 720. Tightening groove; 73. Adjustment spring; 74. Fixing nut. Detailed Implementation

[0050] Before explaining any embodiment of the present invention in detail, it should be understood that the present invention is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0051] In this invention, the terms "comprising," "including," "having," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0052] In this invention, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following related objects have an "and / or" relationship.

[0053] In this invention, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0054] In this invention, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the value and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​not using relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0055] In this invention, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can be performed by one part, one component, or a combination of multiple parts.

[0056] In this utility model, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this utility model. Furthermore, in the context, it should be understood that when one element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent the direct orientation but can also be understood as the lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0057] Example 1

[0058] like Figures 1-2As shown, this embodiment provides a proportional electromagnet with preload adjustment function (hereinafter referred to as proportional electromagnet). The proportional electromagnet includes a housing 10, a coil assembly 30, a tail 40, an armature assembly 50, and an adjustment assembly 70. The housing 10 includes an integrally formed housing body 11 and a front yoke 12. The end of the housing body 11 facing away from the front yoke 12 has an opening 110. The tail 40 is disposed in the housing body 11 and is disposed opposite to the front yoke 12. The coil assembly 30 is disposed in the housing body 11 and is arranged around the front yoke 12 and the tail 40. The armature assembly 50 includes an armature 51 and a push rod 52 connected to the armature 51. The armature 51 is movably inserted into the tail 40. The end of the push rod 52 facing away from the armature 51 passes through the front yoke 12. The armature 51 can move relative to the tail 40 when the coil assembly 30 is energized, and at the same time, it drives the push rod 52 to move relative to the front yoke 12. The adjustment assembly 70 includes an adjustment seat 71, an adjustment rod 72, and an adjustment spring 73. The adjustment seat 71 is installed at the opening 110 of the housing body 11. The adjustment rod 72 is axially adjustable on the adjustment seat 71. The two ends of the adjustment spring 73 abut against one end of the adjustment rod 72 and the armature 51, respectively. The other end of the adjustment rod 72 extends out of the housing body 11.

[0059] When the coil assembly 30 is energized, a ring-shaped magnetic field is generated along the shell body 11, tail 40, and front yoke 12. Under the action of the ring-shaped magnetic field, the armature 51 can move along its own axis, thereby driving the push rod 52 to move synchronously, so as to output force and displacement, and thus trigger the switch of the external actuator. The working principle of the proportional electromagnet is existing technology, and it will not be described in detail in this embodiment.

[0060] The proportional electromagnet provided in this embodiment, through the setting of the adjustment component 70, allows the operator to change the preload force of the adjusting spring 73 acting on the armature 51 by adjusting the position of the adjusting rod 72 relative to the adjusting seat 71, thereby changing the magnitude of the force exerted by the proportional electromagnet at a certain current or voltage. This achieves adjustable force of the proportional electromagnet at a certain current or voltage, making it applicable to various working conditions with different force requirements and improving the versatility of the proportional electromagnet. By setting the end of the adjusting rod 72 away from the adjusting spring 73 to extend outside the housing body 11, it is convenient for the operator to adjust the adjusting rod 72. By setting the housing body 11 and the front yoke 12 as an integrally formed structure, the processing steps of the housing 10 can be simplified, eliminating the assembly step between the two, thereby improving the assembly efficiency of the proportional electromagnet.

[0061] In some embodiments, the adjusting rod 72 is a screw, which is threadedly connected to the adjusting seat 71. That is to say, the operator only needs to perform a simple turning action to adjust the adjusting rod 72, which is simple in structure and convenient and quick in adjustment process.

[0062] In some embodiments, the end of the adjusting rod 72 extending out of the housing body 11 is provided with a screw-in groove 720. An operator can use a screw-in tool compatible with the screw-in groove 720 to rotate the adjusting rod 72, causing it to move along its own axial direction, thereby adjusting the preload of the adjusting spring 73. The screw-in groove 720 can be a flat-head groove or a Phillips head groove, and the screw-in tool can be a flat-head screwdriver or a Phillips head screwdriver.

[0063] In some embodiments, the adjusting assembly 70 further includes a fixing nut 74, which is screwed onto the end of the adjusting rod 72 that extends out of the housing body 11 and can abut against the adjusting seat 71. By providing the fixing nut 74, the adjusting rod 72 and the adjusting seat 71 can be fixed, avoiding relative rotation between the two during use and affecting the accuracy of the preload of the adjusting spring 73.

[0064] like Figure 3 and combined Figure 1 As shown, the armature 51 is provided with a receiving groove 511, and the adjusting spring 73 is at least partially received in the receiving groove 511. By providing a receiving groove 511 on the armature 51 that can accommodate the adjusting spring 73, the extension and retraction of the adjusting spring 73 can be limited so that it extends and retracts along its own axis, preventing it from deviating during the extension and retraction process.

[0065] In some embodiments, the armature 51 has a insertion hole 512, and one end of the push rod 52 is interference-fitted into the insertion hole 512, thereby achieving a fixed connection between the armature 51 and the push rod 52, thus ensuring that the push rod 52 can move synchronously when the armature 51 moves; in addition, this connection method is convenient to operate and can reduce the number of parts and reduce processing costs.

[0066] like Figure 1 and Figure 2 As shown, the front yoke 12 has a through hole 121 extending along its axial direction, and the push rod 52 is movably inserted through the through hole 121. A guide groove 122 is provided at the end of the front yoke 12 facing the tail 40, and the end of the armature 51 facing away from the tail 40 is guided and fitted into the guide groove 122. The guide groove 122 and the through hole 121 provide guidance for the movement of the armature 51 and the push rod 52, thereby ensuring the stability of the armature assembly 50 during movement.

[0067] For example, the depth of the guide groove 122 is 2.0mm to 5.0mm. Users can select a front yoke 12 with a suitable guide groove 122 depth according to actual usage needs to meet the stroke requirements of the proportional electromagnet. For example, the depth of the guide groove 122 can be 2.0mm, 2.5mm, 3.0mm, 3.5mm, 4.0mm, 4.5mm, 5.0mm, etc. Of course, in other embodiments, the depth of the guide groove 122 can also be any other value between 2.0mm and 5.0mm.

[0068] In some embodiments, the first end of the front yoke 12 is frustum-shaped. This arrangement significantly reduces the air gap reluctance, allowing the magnetic field lines to pass through the air gap more concentratedly, forming a more uniform magnetic field distribution and avoiding edge scattering or distortion of the magnetic field. Furthermore, it increases the contact area between the magnetic poles and the air gap, increasing the air gap permeability, thereby generating a stronger magnetic field and a greater initial attraction under the same excitation current. Simultaneously, setting the first end of the front yoke 12 to a frustum shape also serves as a guide, improving the alignment between the front yoke 12 and the coil assembly 30 and increasing assembly efficiency.

[0069] like Figure 1 and Figure 3 As shown, a limiter 521 is provided on the push rod 52, which is used to limit the maximum displacement of the armature assembly 50. Specifically, when the armature assembly 50 moves to the position where the limiter 521 abuts against the front yoke 12, it is the maximum displacement of the armature assembly 50, which is also the maximum stroke of the proportional electromagnet.

[0070] In this embodiment, Figure 4 As shown, the limiting member 521 is a limiting washer. The limiting washer has a certain elasticity, which allows the limiting member 521 and the front yoke 12 to make flexible contact, preventing damage to one of them when they collide, thereby ensuring the safety of the proportional electromagnet. Optionally, the limiting washer has a notch to facilitate the installation of the limiting washer and the push rod 52.

[0071] like Figure 5 and combined Figure 1 As shown, the coil assembly 30 includes a coil frame 31 and enameled wire 32 wound on the coil frame 31. The coil frame 31 is cylindrical, with one end clamped between the shell body 11 and the front yoke 12, and the other end clamped between the shell body 11 and the tail yoke 40. A first sealing element 61 is provided between the inner wall of the coil frame 31 and the front yoke 12, and a second sealing element 62 is provided between the inner wall of the coil frame 31 and the tail yoke 40. By configuring the coil assembly 30 as a coil frame 31 and enameled wire 32 wound on the coil frame 31, and by providing the first sealing element 61 and the second sealing element 62 between the coil frame 31 and the front yoke 12 and between the coil frame 31 and the tail yoke 40 respectively, it is possible to ensure that the coil assembly 30 has good insulation, waterproof, corrosion resistance and heat dissipation performance without encapsulating the coil assembly 30, simplifying the assembly process, improving assembly efficiency, and reducing production costs to a certain extent.

[0072] In some embodiments, the inner wall of the coil frame 31 is further provided with a liner 33, a first seal 61 is located between the liner 33 and the front yoke 12, and a second seal 62 is located between the liner 33 and the tail yoke 40. In this embodiment, the liner 33 is made of a non-magnetic material, which can act as a magnetic barrier to reduce the coupling effect of external magnetic fields on the coil assembly 30, thereby maintaining the stability of the proportional electromagnet's performance. Exemplarily, the liner 33 can be made of non-metallic materials, such as plastic or rubber, or it can be made of metallic materials, such as copper or aluminum. When a metallic liner 33 is used, it can also increase the rigidity of the coil frame 31 and improve the pressure resistance of the coil frame 31.

[0073] In some embodiments, the inner liner 33 is integrally molded onto the coil frame 31 to reduce the number of parts, simplify the assembly process, and facilitate installation. When the inner liner 33 is made of a non-metallic material, the inner liner 33 and the coil frame 31 are integrally injection molded, resulting in high injection molding production efficiency and good product quality. When the inner liner 33 is made of a metallic material, the inner liner 33 can be used as an insert integrally molded with the coil frame 31, simplifying the assembly process and improving assembly efficiency.

[0074] It should be noted that when the inner wall of the coil frame 31 is lined with a metal inner liner 33, the high structural strength of the metal inner liner 33 allows this proportional electromagnet to be used in applications requiring high pressure ratings. When the inner wall of the coil frame 31 is lined with a non-metallic inner liner 33, or when no inner liner 33 is provided, this proportional electromagnet can be used in applications requiring lower pressure ratings. Users can select the appropriate coil assembly 30 according to their actual needs.

[0075] like Figure 1 As shown, one end of the inner liner 33 is provided with a first conical sealing surface 331, which is inclined from top to bottom away from the central axis of the coil frame 31. The first sealing element 61 is located between the first conical sealing surface 331 and the front yoke 12. The other end of the inner liner 33 is provided with a second conical sealing surface 332, which is inclined from bottom to top away from the central axis of the coil frame 31. The second sealing element 62 is located between the second conical sealing surface 332 and the tail yoke 40. By providing the first conical sealing surface 331 and the second conical sealing surface 332 on the inner liner 33, reliable installation of the first sealing element 61 and the second sealing element 62 can be achieved, ensuring good sealing performance between the coil assembly 30 and the front yoke 12, and between the coil assembly 30 and the tail yoke 40.

[0076] Optionally, both the first seal 61 and the second seal 62 can be rubber sealing rings, which have a simple structure, are easy to install, and have a good sealing effect.

[0077] It should be noted that the directional terms such as "up," "down," "inner," and "outer" used in this embodiment are all in the context of... Figure 1 The description of the orientation and positional relationships shown should not be construed as limiting this embodiment.

[0078] like Figure 1 , Figure 6 and Figure 7 As shown, the proportional electromagnet also includes a plug assembly 20, which is disposed on the housing body 11. The plug assembly 20 is used to supply power to the coil assembly 30 to form a ring magnetic field between the housing body 11, the tail 40 and the front yoke 12.

[0079] In this embodiment, the plug assembly 20 includes a socket 21 and a pin 22. The socket 21 includes a fixed part 211 and an annular mounting part 212 connected to each other. The fixed part 211 is disposed on the side of the housing body 11 and has an electrical connector for connecting to an external power source. The annular mounting part 212 is located in the housing body 11 and between the adjusting seat 71 and the tail 40. The pin 22 is disposed on the annular mounting part 212 and is electrically connected to the terminal 321 of the coil assembly 30.

[0080] In some embodiments, the coil frame 31 is provided with mounting holes 310 corresponding to the pins 22. The pins 22 and the terminals 321 of the enameled wire 32 are interference-fitted into the mounting holes 310 so that the pins 22 and the terminals 321 abut against each other. By providing mounting holes 310 on the coil frame 31, and interference-fitting the terminals 321 of the enameled wire 32 and the pins 22 into the mounting holes 310, stable mounting of the pins 22 and the terminals 321 in the mounting holes 310 is achieved, while ensuring that they abut against each other, thus achieving a stable electrical connection.

[0081] To facilitate the quick insertion of pin 22 into mounting hole 310, such as Figure 7 As shown, the end of the pin 22 is truncated cone-shaped. The truncated cone structure can guide the pin 22 into the mounting hole 310, so that it can be inserted into the mounting hole 310 quickly and accurately.

[0082] Continue as Figure 1 As shown, a third sealing element 63 is provided between the annular mounting portion 212 and the housing body 11 to ensure the sealing performance between the socket 21 and the housing body 11. A fourth sealing element 64 is provided between the annular mounting portion 212 and the tail 40 to ensure the sealing performance between the socket 21 and the tail 40. Optionally, both the third sealing element 63 and the fourth sealing element 64 can be rubber sealing rings, which have a simple structure, are easy to install, and have a good sealing effect.

[0083] In this embodiment, the tail 40 and the shell body 11 are interference-fitted, which facilitates assembly and ensures stable installation between the two.

[0084] After the coil assembly 30, tail 40, armature assembly 50, and plug assembly 20 are all installed on the housing body 11, the opening 110 of the housing body 11 is rolled to complete the encapsulation, thereby ensuring the overall stability and sealing of the electromagnet. This also ensures that the annular mounting portion 212, tail 40, coil assembly 30, and front yoke 12 are tightly abutted against each other, further guaranteeing the connection quality of the terminal 321 and pin 22, preventing them from falling off during use and affecting the electromagnet's performance.

[0085] Example 2

[0086] This embodiment provides a proportional electromagnet, the specific structure of which is roughly the same as that of the proportional electromagnet provided in Embodiment 1, the difference being that the structure of the limiting member 521 is different.

[0087] like Figures 8-9 As shown, in this embodiment, the limiting member 521 is a limiting nut, which is screwed onto the push rod 52 to limit the maximum displacement of the armature assembly 50. By setting the limiting member 521 as a limiting nut, the ease of installation of the limiting member 521 and the push rod 52 can be improved, and the processing cost of this proportional electromagnet can be reduced to a certain extent.

[0088] Example 3

[0089] This embodiment provides a proportional electromagnet, the specific structure of which is roughly the same as that of the proportional electromagnet provided in Embodiment 1, the difference being that the structure of the plug assembly 20 is different.

[0090] like Figures 10-11 As shown, in this embodiment, the plug assembly 20 includes a socket 21 and a pin 22 disposed on the socket 21. The socket 21 is annular and located within the housing body 11, between the adjusting seat 71 and the tail 40. A connecting lead 23 for electrically connecting to an external power source is connected to the socket 21. The pin 22 is electrically connected to the terminal 321 of the coil assembly 30. This arrangement saves installation space for the plug assembly 20 and meets the miniaturization design requirements of the proportional electromagnet.

[0091] The matching method between the socket 21 and the shell body 11 and between the socket 21 and the tail 40 in this embodiment is the same as the matching method between the annular mounting part 212 and the shell body 11 and between the annular mounting part 212 and the tail 40 in Embodiment 1; the connection method between the pin 22 and the terminal 321 in this embodiment is the same as the connection method between the pin 22 and the terminal 321 in Embodiment 1, and will not be described again in this embodiment.

[0092] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that the above embodiments do not limit this utility model in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this utility model.

Claims

1. A proportional electromagnet with preload adjustment function, characterized in that, include: The outer shell (10) includes an integrally formed shell body (11) and a front yoke (12), wherein the shell body (11) has an opening (110) at one end opposite to the front yoke (12). Tail yoke (40) is disposed in the shell body (11), and the tail yoke (40) is disposed opposite to the front yoke (12); A coil assembly (30) is disposed in the shell body (11) and surrounds the front yoke (12) and the tail yoke (40); The armature assembly (50) includes an armature (51) and a push rod (52) connected to the armature (51). The armature (51) is movably inserted into the tailstock (40). The push rod (52) is disposed with one end away from the armature (51) passing through the front yoke (12). The armature (51) can move relative to the tailstock (40) when the coil assembly (30) is energized, and at the same time drive the push rod (52) to move relative to the front yoke (12). The adjustment assembly (70) includes an adjustment seat (71), an adjustment rod (72), and an adjustment spring (73). The adjustment seat (71) is installed at the opening (110) of the shell body (11). The adjustment rod (72) is axially adjustable on the adjustment seat (71). The two ends of the adjustment spring (73) abut against one end of the adjustment rod (72) and the armature (51), respectively. The other end of the adjustment rod (72) extends out of the shell body (11).

2. The proportional electromagnet with preload adjustment function according to claim 1, characterized in that, The adjusting rod (72) is a screw, which is threadedly connected to the adjusting seat (71).

3. The proportional electromagnet with preload adjustment function according to claim 2, characterized in that, The adjustment assembly (70) also includes a fixing nut (74), which is screwed onto one end of the adjustment rod (72) that extends out of the housing body (11) and can abut against the adjustment seat (71).

4. The proportional electromagnet with preload adjustment function according to claim 1, characterized in that, The armature (51) is provided with a receiving groove (511), and the adjusting spring (73) is at least partially received in the receiving groove (511).

5. The proportional electromagnet with preload adjustment function according to claim 1, characterized in that, The push rod (52) is provided with a limiting member (521), which can abut against the front yoke (12) to limit the maximum displacement of the armature assembly (50).

6. The proportional electromagnet with preload adjustment function according to claim 5, characterized in that, The limiting component (521) is a limiting washer; or the limiting component (521) is a limiting nut.

7. The proportional electromagnet with preload adjustment function according to claim 1, characterized in that, The front yoke (12) is provided with a guide groove (122) at one end facing the tail (40), and the armature (51) is guided and fitted into the guide groove (122) at one end away from the tail (40). And / or, the end of the front yoke (12) facing the tail (40) is frustoconical.

8. The proportional electromagnet with preload adjustment function according to any one of claims 1 to 7, characterized in that, The proportional electromagnet with preload adjustment function also includes a plug assembly (20) configured to supply power to the coil assembly (30).

9. The proportional electromagnet with preload adjustment function according to claim 8, characterized in that, The plug assembly (20) includes: The socket (21) includes a fixed part (211) and an annular mounting part (212) connected to each other. The fixed part (211) is disposed on the side of the housing body (11) and has an electrical connector for connecting to an external power source. The annular mounting part (212) is located in the housing body (11) and between the adjusting seat (71) and the tail (40). A pin (22) is disposed on the annular mounting portion (212), and the pin (22) is electrically connected to the terminal (321) of the coil assembly (30).

10. The proportional electromagnet with preload adjustment function according to claim 8, characterized in that, The plug assembly (20) includes: The socket (21) is ring-shaped and is disposed in the housing body (11) and located between the adjusting seat (71) and the tail (40); A pin (22) is disposed on the socket (21), and the pin (22) is electrically connected to the terminal (321) of the coil assembly (30); Connecting lead (23) is connected to the socket (21) and can be electrically connected to an external power source.

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