An electromagnetic coil

Abstract

The utility model relates to the technical field of electromagnetic coil discloses an electromagnetic coil, including, skeleton, skeleton includes winding portion, and the one end of winding portion is provided with first stop portion, wire, winding in winding portion, insert piece group, including two fixed in first stop portion's insert piece, and the insert piece includes the connecting of link segment, bending portion, mounting section in proper order, and link segment one end is connected with first stop portion, and the other end is connected with the end of wire, and bending portion is the structure that can be bent, and mounting section is equipped with the diode mounting portion for fixing diode, and mounting section can be bent along bending portion, let diode finally fix in the space that skeleton radial outside has, neither need to occupy extra space, can effectively simplify the overall volume of coil, and can be in initial state make mounting section and winding groove dislocation, avoid shielding wire winding path, reduce wire hook connection, tension uneven etc. when winding.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic technology, and more specifically to an electromagnetic coil. Background Technology

[0002] As the core component for electromagnetic conversion, the electromagnetic coil typically consists of a frame, wire windings, inserts, and an insulating layer. Since the coil is inherently an inductive load, it continuously stores magnetic energy when energized. However, at the moment of de-energization, the rapid change in current causes a sudden change in magnetic flux, generating a high reverse induced electromotive force, i.e., surge voltage. This voltage can easily damage the drive circuit and the coil itself. To suppress surges, current technologies often use diodes connected in parallel across the electromagnetic coil. Diodes usually require mounting structures (such as brackets or slots) for fixation, which occupies additional space, making it difficult to further reduce the overall size of the coil and unsuitable for some miniaturized devices (such as micro relays and hydraulic valve coil assemblies). More importantly, the diodes and their mounting components protruding from the insert plane can easily obstruct the winding path of the wires, interfering with the normal winding process and potentially causing wire tangling, uneven tension, and other problems during winding, affecting the winding quality and coil performance stability.

[0003] Therefore, how to avoid interference with the winding process by diode installation and reduce its impact on spatial layout while ensuring effective surge suppression and circuit safety has become a pressing technical challenge in the field of electromagnetic coil assembly design. Utility Model Content

[0004] The purpose of this invention is to provide an electromagnetic coil that can effectively suppress surges and ensure circuit safety while avoiding interference from diode installation on the winding process and reducing its impact on spatial layout.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: an electromagnetic coil, comprising: a frame including a winding portion, one end of which is provided with a first stop portion; a wire wound around the winding portion; and a plug assembly including two plugs fixed to the first stop portion. Each plug includes a connecting segment, a bending portion, and a mounting segment connected in sequence. One end of the connecting segment is connected to the first stop portion, and the other end is connected to the end of the wire. The bending portion is a bendable structure. The mounting segment is provided with a diode mounting portion for fixing a diode. The mounting segment can be bent along the bending portion to place the diode mounting portion in a preset state.

[0006] As an alternative, the diode mounting portion extends from the side of the mounting section away from the frame, and the end of the diode mounting portion is provided with a slot for accommodating the diode lead. The slot has a notch, and after the diode lead is placed into the notch, the slot can fix the lead by clamping deformation.

[0007] As an alternative, the bending portion includes a bending section with symmetrical notches on both sides, forming a narrow neck structure with a width smaller than that of the wiring section and the mounting section.

[0008] As an alternative, in the preset state, the angle between the mounting section and the wiring section is 80°-100°, and the diode mounting portion is located radially outside the frame.

[0009] As an alternative, the side wall of the first stop portion is provided with a winding groove, the electromagnetic coil has an initial state, and the bending portion further includes a transition section that bends away from the skeleton so that in the initial state, the mounting section is offset relative to the winding groove along a first direction. The transition section and the bending section are integral structures, the transition section is connected to the wiring section, and the bending section is connected to the mounting section.

[0010] As an alternative, the end of the connector away from the first stop has a take-up section, and the end of the conductor is wound and fixed to the take-up section.

[0011] As an alternative, a fixing part is provided extending from one side of the wiring segment. The fixing part can be deformed and bent relative to the wiring segment and fastened to the top of the wiring segment to further compress the wire.

[0012] Alternatively, the insert may further include a plug section for connecting to an external power source, the plug section extending vertically outward from one side of the mounting section.

[0013] As an alternative, the first stop portion has a slot, and the wiring segment has toothed grooves on both sides, with the wiring segment having an interference fit with the inner wall of the slot through the toothed grooves.

[0014] As an alternative, the electromagnetic coil further includes a housing, an upper cover plate, a lower cover plate, and a grounding plug. The housing is arranged around the frame, the upper cover plate and the lower cover plate are respectively snapped onto both ends of the housing, and the lower cover plate is located at the end of the housing away from the first baffle. The grounding plug is fixedly connected to the lower cover plate.

[0015] The beneficial effects of this utility model are:

[0016] This invention provides an electromagnetic coil that integrates a mounting section and a diode mounting part with a slot on a insert. By utilizing a bending part, the mounting section can be bent to a preset state, allowing the diode to be finally fixed in the existing space on the radially outer side of the frame. This not only eliminates the need for additional space and effectively simplifies the overall size of the coil to accommodate miniaturized devices such as micro relays, but also allows the mounting section to be misaligned with the winding slot in the initial state via a transition section. This avoids obstructing the winding path of the wires and reduces problems such as wire tangling and uneven tension during winding, thus ensuring the winding quality and coil performance stability. While achieving surge suppression to protect the drive circuit and coil, it also takes into account structural compactness and assembly reliability. Attached Figure Description

[0017] Figure 1 A schematic diagram of the skeleton structure of the electromagnetic coil provided by this utility model;

[0018] Figure 2 This is a schematic diagram of the initial state of the electromagnetic coil provided by this utility model;

[0019] Figure 3 A schematic diagram of the electromagnetic coil in a preset state provided by this utility model;

[0020] Figure 4 A schematic diagram of the insert structure provided by this utility model;

[0021] In the picture:

[0022] 1. Frame; 11. Winding section; 12. First stop section; 121. Winding groove; 122. Slot;

[0023] 13. Second stop section; 2. Wire; 3. Insert; 31. Connecting section; 311. Take-up section;

[0024] 312. Fixing part; 313. Tooth groove; 32. Bending part; 321. Bending section; 322. Transition section;

[0025] 33. Mounting section; 331. Diode mounting section; 3311. Slot; 3312. Slot opening; 34. Connecting section;

[0026] 4. Grounding connector; 5. Diode; 6. Housing; 7. Top cover; 8. Bottom cover. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0028] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0029] In the description of this embodiment, "first direction" refers to the direction along the axial direction of the skeleton from the second stop portion to the first stop portion.

[0030] This utility model provides an electromagnetic coil that can be used in a solenoid valve. Specifically, refer to... Figure 1 , Figure 2 An electromagnetic coil includes a frame 1, a conductor 2, a plug assembly, and a grounding plug 4. The frame 1 is made of insulating material and includes a cylindrical winding portion 11. The conductor 2 is at least partially wound around the winding portion 11 to form a winding. One end of the winding portion 11 is provided with a disc-shaped first stop portion 12 with a radial dimension larger than the winding portion 11. The side wall of the first stop portion 12 has a winding groove 121, which includes an inlet groove and an outlet groove for guiding the conductor 2 into or out of the winding portion 11. The inlet groove and outlet groove can restrict the conductor 2, keeping it taut and preventing it from being suspended. During subsequent resin injection molding, this prevents the conductor 2 from breaking due to high injection pressure, thus avoiding a short circuit in the electromagnetic coil. A slot 122 is provided between the inlet groove and the outlet groove on the side wall of the first stop portion 12 for connecting with the plug assembly. A second stop 13, with a radial dimension larger than that of the winding portion 11, is provided at the end of the winding portion 11 away from the first stop 12. The first stop 12 and the second stop 13 together restrict the axial displacement of the wire 2 in the winding portion 11. A housing 6 surrounds the frame 1. An upper cover plate 7 and a lower cover plate 8 are respectively snapped onto both ends of the housing 6. The upper cover plate 7 is located at the end of the housing 6 near the first stop 12, and the lower cover plate 8 is located at the end of the housing 6 near the second stop 13. These cover plates are used to protect the internal coil and can also form a closed magnetic circuit with the matching components during use. A grounding plug 4 is fixedly connected to the lower cover plate 8. The electromagnetic coil is electrically connected to the external circuit through the plug group and the grounding plug 4.

[0031] Reference Figure 2 , Figure 4The insert assembly includes two symmetrical metal inserts 3. Each insert 3 includes a wiring segment 31, a bent portion 32, and a mounting section 33 connected in sequence. One end of the wiring segment 31 is inserted into the slot 122 of the first stop portion 12. Gears 313 are provided on both sides of the end of the wiring segment 31 inserted into the slot 122, achieving a fixed connection through an interference fit between the gears 313 and the inner wall of the slot 122. A "U"-shaped notch is provided on the side of the wiring segment 31 away from the first stop portion 12, forming a hook-shaped take-up portion 311. The wire 2 is wound around the winding portion 11 to form a winding, with its two ends respectively tightened at the take-up portions 311 of the two inserts 3. It should be noted that the wire 2 and the insert 3 are usually fixedly connected by welding to ensure connection strength, better resist the pressure of injection molding, and prevent the connection from breaking. Simultaneously, the high temperature during welding can also break the enameled layer of the wire 2, achieving an electrical connection between the wire 2 and the insert 3. The end of the wire 2 is wrapped around the take-up portion 311 for initial fixation, limiting the displacement of the wire 2 in subsequent processes and preventing it from deviating from the welding position. To further strengthen the connection between the wire 2 and the connector 3, a fixing portion 312 is integrally extended from one side of the connector segment 31. This fixing portion 312 is a thin-walled sheet structure that can be deformed and bent relative to the connector segment 31 and fastened to the top of the connector segment 31, thereby pressing the wire 2 tightly onto the connector segment 31. Through the above arrangement, during the welding process of the wire 2 and the connector 3, after the fixing portion 312 is fastened to the top of the connector segment 31, the wire 2 can be pressed tightly onto the connector segment 31, ensuring that the welding surfaces of the wire 2 and the connector segment 31 are always in tight contact, avoiding the problem of incomplete welding caused by excessive gaps between the two or displacement during welding.

[0032] To prevent the insert from obstructing the winding path, the electromagnetic coil provided by this invention has an initial state and a preset state. In the initial state, refer to... Figure 2 The plane where the mounting section 33 is located is parallel to the plane where the wiring section 31 is located, and the mounting section 33 is offset relative to the winding groove 121 along the first direction, so that the mounting section 33 will not obstruct the winding path of the wire 2. In the preset state, refer to Figure 3 The mounting section 33 is located on the radial outer side of the frame 1, and the diode 5 is installed below the wiring section 31 in the space on the radial outer side of the frame 1, which can make full use of the existing structural gaps and avoid taking up extra space.

[0033] Specifically, refer to Figure 2 , Figure 4The bending portion 32 extends from one side of the wiring segment 31. The bending portion 32 includes a bending section 321, with symmetrical "V"-shaped notches on both sides, creating a narrow neck structure with a width smaller than that of the wiring segment 31 and the mounting section 33. This narrow neck structure has lower mechanical strength and facilitates bending operations. Furthermore, the bending portion 32 also includes a transition section 322 that bends away from the frame 1, allowing the mounting section 33 to be offset relative to the winding groove 121 in the first direction in the initial state, thus preventing the mounting section 33 from obstructing the winding path of the wire 2 and interfering with the normal winding of the automated winding equipment. The transition section 322 and the bending section 321 are integral structures; the transition section 322 is connected to the wiring segment 31, and the bending section 321 is connected to the mounting section 33.

[0034] Reference Figure 3 , Figure 4 The mounting section 33 extends from the end of the bending section 321 away from the transition section 322. A diode mounting portion 331 for fixing the diode 5 extends from the side of the mounting section 33 away from the frame 1. The diode 5, as a key component ensuring circuit safety, is connected in parallel with the electromagnetic coil through the diode mounting portion 331. The end of the diode mounting portion 331 has a slot 3311 for accommodating the lead wire of the diode 5. The slot 3311 has a semi-enclosed structure, with a slot 3312 at its tail that matches the diameter of the diode 5 lead wire. During assembly, when the diode 5 lead wire is placed into the slot 3312, external force can be applied to the slot 3311 to cause plastic clamping deformation, thereby clamping the lead wire and achieving mechanical fixing and electrical connection of the diode 5. This diode 5 fixing method has a simple structure and is easy to automate assembly. In this embodiment, diode 5 is selected as a transient suppression diode, which has a nanosecond-level response speed. It can both perform rectification and quickly block reverse current, effectively absorbing the surge voltage generated by the electromagnetic coil when the power is off, providing reliable protection for the stable operation of the entire coil circuit. It should be noted that the layout of the mounting section 33 and the fixing part 312 on the wiring section 31 is flexible. The mounting section 33 and the fixing part 312 can be set on the same side of the wiring section 31, or they can be set on different sides of the wiring section 31.

[0035] In addition, one side of the mounting section 33 extends away from the frame 1 to form a plug section 34, and the plug section 34 is perpendicular to the mounting section 33 for connection to an external power source.

[0036] Reference Figure 3After the winding is completed, the mounting section 33 can be bent along the bending section 321, thereby placing the diode mounting part 331 in a preset state suitable for mounting the diode 5. In the preset state, the angle between the mounting section 33 and the wiring section 31 is approximately 80° to 100°, preferably 90°, and the mounting section 33 and the diode mounting part 331 are located radially outside the frame 1, so that the diode 5 is installed in the space below the wiring section 31 and radially outside the frame 1, making full use of the existing structural gaps and avoiding additional space occupation, thereby ensuring that the overall volume of the coil is not affected by the added diode 5.

[0037] During assembly, first insert the wiring segments 31 of the two plugs 3 into the slots 122 of the first stop part 12 for fixation. Then, wrap one end of the wire 2 around the take-up part 311 of one of the plugs 3 and bend the fixing part 312 to press the wire 2 tightly to prevent the wire 2 from loosening. Then, guide the wire 2 through the inlet slot into the winding part 11 for winding. After winding according to the set number of turns, lead the tail end of the wire 2 out from the outlet slot and wrap it around the take-up part 311 of the other plug 3. Then, bend the bending part 32 so that the mounting section 33 and the diode mounting part 331 are located in the preset position for mounting the diode 5. Finally, put the two leads of the diode 5 into the slots 3312 of the two plugs 3 respectively, press the slot seat 3311 to make it clamp and deform, so as to realize the mechanical fixation and electrical connection of the diode 5.

[0038] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An electromagnetic coil, characterized in that, include: The skeleton (1) includes a winding part (11), and a first stop part (12) is provided at one end of the winding part (11); The conductor (2) is at least partially wound around the winding portion (11); The insert assembly includes two inserts (3) fixed to the first stop (12). Each insert (3) includes a wiring segment (31), a bending segment (32), and a mounting segment (33) connected in sequence. One end of the wiring segment (31) is connected to the first stop (12), and the other end is connected to the end of the wire (2). The bending segment (32) is a bendable structure. The mounting segment (33) is provided with a diode mounting part (331) for fixing the diode (5). The mounting segment (33) can be bent along the bending segment (32) so that the diode mounting part (331) is in a preset state.

2. An electromagnetic coil according to claim 1, characterized in that: The diode mounting portion (331) extends from the mounting section (33) away from the frame (1). The end of the diode mounting portion (331) is provided with a slot (3311) for accommodating the lead wire of the diode (5). The slot (3311) has a slot (3312). After the lead wire of the diode (5) is placed into the slot (3312), the slot (3311) can fix the lead wire by clamping deformation.

3. An electromagnetic coil according to claim 2, characterized in that: The bending portion (32) includes a bending section (321), and the bending section (321) has symmetrical notches on both sides, so that the part forms a narrow neck structure with a width smaller than that of the wiring section (31) and the mounting section (33).

4. An electromagnetic coil according to claim 3, characterized in that: In the preset state, the angle between the mounting section (33) and the wiring section (31) is 80° to 100°, and the diode mounting part (331) is located on the radial outer side of the frame (1).

5. An electromagnetic coil according to claim 3, characterized in that: The first stop (12) has a winding groove (121) on its side wall. The electromagnetic coil has an initial state. The bending part (32) also includes a transition section (322) that bends away from the skeleton (1) so that in the initial state, the mounting section (33) is offset relative to the winding groove (121) in a first direction. The transition section (322) and the bending section (321) are an integral structure. The transition section (322) is connected to the wiring section (31), and the bending section (321) is connected to the mounting section (33).

6. An electromagnetic coil according to claim 5, characterized in that: The end of the wiring segment (31) away from the first stop (12) is provided with a take-up section (311), and the end of the wire (2) is wound and fixed to the take-up section (311).

7. An electromagnetic coil according to claim 6, characterized in that: A fixing part (312) extends from one side of the wiring segment (31). The fixing part (312) can be deformed and bent relative to the wiring segment (31) and fastened to the top of the wiring segment (31) to further press the wire (2).

8. An electromagnetic coil according to claim 7, characterized in that: The insert (3) also includes a plug section (34) for connecting an external power source, the plug section (34) extending vertically outward from one side of the mounting section (33).

9. An electromagnetic coil according to claim 8, characterized in that: The first stop (12) has a slot (122), and the wiring segment (31) has toothed grooves (313) on both sides. The wiring segment (31) is press-fitted with the inner wall of the slot (122) through the toothed grooves (313).

10. An electromagnetic coil according to any one of claims 1-9, characterized in that: The electromagnetic coil also includes a housing (6), an upper cover plate (7), a lower cover plate (8), and a grounding plug (4). The housing (6) surrounds the frame (1). The upper cover plate (7) and the lower cover plate (8) are respectively snapped onto the two ends of the housing (6), and the lower cover plate (8) is located at the end of the housing (6) away from the first baffle. The grounding plug (4) is fixedly connected to the lower cover plate (8).

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