Electromagnetic driver
By designing a sealed connection between the fixed iron core and the outer shell, and sealing rings at both ends of the winding frame, combined with a guiding structure, the problem of impurities intruding into the electromagnetic actuator under engine vibration was solved, achieving a dual improvement in sealing performance and processing cost.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGMEN YIHE ELECTROMECHANICAL CO LTD
- Filing Date
- 2025-07-10
- Publication Date
- 2026-07-03
AI Technical Summary
Existing electromagnetic actuators are susceptible to dust and oil contamination under engine vibration, affecting reliability, and the sealing rings are difficult to process and costly.
The fixed iron core is sealed to the outer shell, and sealing rings are set at both ends of the winding frame. Combined with the guide structure and wear-resistant parts, multiple guides are formed to reduce wear and impurity intrusion.
This improves the sealing performance and ease of manufacturing of electromagnetic drives, reduces production costs, and extends service life and reliability.
Smart Images
Figure CN224459470U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of driver technology, and in particular to an electromagnetic driver. Background Technology
[0002] Engines typically employ electromagnetic actuators to control the movement of corresponding cams, meeting operational requirements under various conditions. However, the installation location of these actuators is close to the engine, making them susceptible to contamination from dust, oil, and other impurities due to engine vibrations, thus affecting their reliability. Existing electromagnetic actuators usually incorporate sealing rings on the inner wall of the coil to prevent contamination, but this method is difficult to manufacture, results in low yield rates, and leads to high production costs. Utility Model Content
[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an electromagnetic actuator that not only improves sealing performance but also facilitates processing and manufacturing, thus helping to reduce production costs.
[0004] An electromagnetic driver according to a first aspect of the present invention includes a housing mechanism, a fixed iron core, a moving iron core, and an electromagnetic assembly. The housing mechanism includes a shell and an end cap. One end of the shell has a mounting hole, and the other end of the shell is fixedly connected to the end cap. The shell and the end cap form a mounting cavity. The fixed iron core passes through the mounting hole into the mounting cavity and has a through hole. The moving iron core is slidably disposed in the through hole. The electromagnetic assembly includes a winding frame and a coil. The winding frame is arranged in the mounting cavity, and the coil is disposed on the winding frame. The coil is used to generate a magnetic field to attract the moving iron core to move along the axial direction of the through hole towards the fixed iron core. The fixed iron core and the shell are sealed together at the mounting hole. Both ends of the winding frame have first positioning grooves. The two first positioning grooves are respectively equipped with a first sealing ring and a second sealing ring. The first sealing ring abuts against the end face of the shell near the mounting hole, and the second sealing ring abuts against the end cap.
[0005] The electromagnetic driver according to the embodiments of this utility model has at least the following beneficial effects: the outer shell and the end cover form a mounting cavity, the winding frame is arranged in the mounting cavity, the coil is arranged on the winding frame, the fixed iron core passes through the mounting hole in the mounting cavity, the moving iron core is arranged in the winding frame, and the moving iron core can slide along the axial direction of the through hole. When the coil generates a magnetic field, it can attract the moving iron core to move closer to the fixed iron core; when the coil is closed, the moving iron core moves away from the fixed iron core. By setting a fixed iron core and a housing to be sealed at the mounting hole, and with the first and second sealing rings respectively arranged in the first positioning grooves on both ends of the winding frame, the first sealing ring seals the end face of the housing near the mounting hole with the winding frame, and the second sealing ring seals the end cap with the winding frame, thus preventing impurities from entering the moving iron core. This allows the moving iron core to slide smoothly in the through hole, reducing wear on the moving iron core and extending its service life. Furthermore, by setting a fixed iron core to be sealed at the mounting hole, the two first positioning grooves can be arranged on both ends of the winding frame, eliminating the need to open a first positioning groove on the inside of the winding frame to accommodate the sealing rings. This facilitates manufacturing, helps improve yield, and reduces processing costs.
[0006] According to some embodiments of the present invention, a first wear-resistant component is fixedly connected to one end of the through hole facing the outside of the fixed iron core. The first wear-resistant component has a first guide hole. The outer dimension of the first guide hole is smaller than the outer dimension of the through hole. The moving iron core is slidably connected to the first guide hole.
[0007] According to some embodiments of the present invention, a second wear-resistant member is fixedly connected to the end of the through hole away from the first wear-resistant member. The second wear-resistant member has a second guide hole. The outer dimension of the second guide hole is smaller than the outer dimension of the through hole. The moving iron core is slidably connected to the second guide hole.
[0008] According to some embodiments of the present invention, the end cap is provided with a guide groove along the axial direction of the moving iron core, and the moving iron core is slidably connected to the guide groove.
[0009] According to some embodiments of the present invention, the moving iron core includes a central shaft passing through the through hole, the middle part of the central shaft being spaced apart from the inner wall of the through hole, and the two ends of the central shaft being supported on the fixed iron core by the first wear-resistant member and the second wear-resistant member, respectively.
[0010] According to some embodiments of the present invention, the surface of the central shaft has a nitrided layer.
[0011] According to some embodiments of the present invention, the moving iron core further includes a fixing block, a shock-absorbing block, and an elastic element. The fixing block is fixedly connected to the end of the central shaft near the end cover. The fixing block has a sliding groove. The shock-absorbing block is slidably connected to the sliding groove. The elastic element is arranged between the central shaft and the shock-absorbing block. The elastic element is used to drive the shock-absorbing block to extend out of the sliding groove.
[0012] According to some embodiments of the present invention, the shock absorber includes a main body and two abutting parts, the main body is slidably connected to the groove, and the two abutting parts are respectively arranged at both ends of the main body.
[0013] According to some embodiments of the present invention, the fixed iron core is provided with a second positioning groove, the second positioning groove is arranged around the fixed iron core, and a third sealing ring is fitted into the second positioning groove.
[0014] 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
[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:
[0016] Figure 1 This is a schematic diagram of an electromagnetic driver according to an embodiment of the present invention;
[0017] Figure 2 This is a cross-sectional view of the electromagnetic driver according to an embodiment of the present invention;
[0018] Figure 3 This is an exploded view of the electromagnetic driver according to an embodiment of the present invention.
[0019] Figure label:
[0020] Housing mechanism 100, outer shell 110, mounting hole 111, end cap 120, guide groove 121, mounting cavity 130;
[0021] Fixed iron core 210, through hole 211, first wear-resistant part 212, first guide hole 213, second wear-resistant part 214, second guide hole 215, second positioning groove 216, third sealing ring 217;
[0022] Moving iron core 220, central shaft 221, fixing block 222, sliding groove 223, shock absorber block 224, main body 225, abutting part 226, elastic element 227;
[0023] Electromagnetic component 230, winding frame 231, coil 232, first positioning groove 233, first sealing ring 234, second sealing ring 235. Detailed Implementation
[0024] 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 are only used to explain this utility model, and should not be construed as limiting this utility model.
[0025] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.
[0026] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.
[0027] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0028] Understandably, referring to Figures 1 to 3The electromagnetic actuator of this utility model includes a housing mechanism 100, a fixed iron core 210, a moving iron core 220, and an electromagnetic assembly 230. The housing mechanism 100 includes a shell 110 and an end cap 120. One end of the shell 110 has a mounting hole 111, and the other end of the shell 110 is fixedly connected to the end cap 120. The shell 110 and the end cap 120 form a mounting cavity 130. The fixed iron core 210 passes through the mounting hole 111 and is installed in the mounting cavity 130. The fixed iron core 210 has a through hole 211. The moving iron core 220 is slidably disposed in the through hole 211. The electromagnetic assembly 230 includes a winding frame 231 and a coil 232. 231 is arranged in the mounting cavity 130, and the coil 232 is set on the winding frame 231. The coil 232 is used to generate a magnetic field to attract the moving iron core 220 to move along the axial direction of the through hole 211 towards the fixed iron core 210. The fixed iron core 210 is sealed to the outer shell 110 at the mounting hole 111. The two end faces of the winding frame 231 are provided with first positioning grooves 233. The two first positioning grooves 233 are respectively equipped with a first sealing ring 234 and a second sealing ring 235. The first sealing ring 234 abuts against the end face of the outer shell 110 near the mounting hole 111, and the second sealing ring 235 abuts against the end cover 120.
[0029] The outer shell 110 and the end cap 120 form a mounting cavity 130. The winding frame 231 is arranged in the mounting cavity 130, the coil 232 is arranged on the winding frame 231, the fixed iron core 210 passes through the mounting hole 111 in the mounting cavity 130, the moving iron core 220 is arranged in the winding frame 231, and the moving iron core 220 can slide along the axial direction of the through hole 211.
[0030] When the coil 232 generates a magnetic field, it attracts the moving iron core 220 to move closer to the fixed iron core 210; when the coil 232 is closed, the moving iron core 220 moves away from the fixed iron core 210. By setting the fixed iron core 210 and the outer casing 110 to be sealed at the mounting hole 111, and the first sealing ring 234 and the second sealing ring 235 respectively arranged in the first positioning groove 233 on both ends of the winding frame 231, the first sealing ring 234 seals the end face of the outer casing 110 near the mounting hole 111 with the winding frame 231, and the second sealing ring 235 seals the end cover 120 with the winding frame 231, so as to prevent impurities from entering the moving iron core 220, allowing the moving iron core 220 to slide smoothly in the through hole 211, reducing the wear of the moving iron core 220 and extending its service life.
[0031] By setting the fixed iron core 210 to be sealed at the mounting hole 111, the two first positioning grooves 233 can be arranged on both ends of the winding frame 231. There is no need to open the first positioning groove 233 on the inner side of the winding frame 231 to accommodate the sealing ring, which facilitates processing and manufacturing, helps to improve the yield rate and reduce processing costs.
[0032] It should be noted that since the coil 232 needs to be connected to the power supply through an interface, the outer casing 110 needs to have an opening to avoid the interface location, which makes it easy for impurities to enter the electromagnetic driver. By setting the fixed iron core 210 to be sealed at the mounting hole 111, impurities can be prevented from entering the mounting cavity 130 through the mounting hole 111. This allows the first sealing ring 234 and the second sealing ring 235 to be arranged on both ends of the winding frame 231, and the first positioning groove 233 to be arranged on the end face of the winding frame 231. It is not necessary to arrange the first positioning groove 233 on the inner side wall of the winding frame 231, which facilitates the processing and manufacturing of the winding frame 231 and helps to reduce processing difficulty and production costs.
[0033] The fixed iron core 210 and the outer shell 110 can be fixed at the mounting hole 111 by welding, gluing or other means, so that the fixed iron core 210 and the outer shell 110 are sealed at the mounting hole 111. This not only makes it easy to seal the mounting hole 111, but also allows the first sealing ring 234 and the second sealing ring 235 to be arranged on both ends of the winding frame 231, making the electromagnetic driver easier to process, helping to improve the yield rate and reduce production costs.
[0034] In addition, by arranging the first sealing ring 234 and the second sealing ring 235 in the first positioning groove 233, the positions of the first sealing ring 234 and the second sealing ring 235 can be easily positioned, so that the first sealing ring 234 and the second sealing ring 235 can be stably placed in the first positioning groove 233, avoiding positional displacement of the first sealing ring 234 and the second sealing ring 235 and improving sealing stability.
[0035] Both the first sealing ring 234 and the second sealing ring 235 can be elastic components such as rubber or silicone parts to absorb gaps in the connection area and improve sealing performance.
[0036] Understandably, referring to Figure 2 A first wear-resistant component 212 is fixedly connected to one end of the through hole 211 facing the outside of the fixed iron core 210. The first wear-resistant component 212 has a first guide hole 213, the outer dimension of which is smaller than that of the through hole 211. The moving iron core 220 is slidably connected to the first guide hole 213. The first wear-resistant component 212 is fixedly connected to the outside of the through hole 211 facing the fixed iron core 210. By providing the first guide hole 213 on the first wear-resistant component 212 and slidably connecting the moving iron core 220 to the first guide hole 213, the first guide hole 213 can guide the movement direction of the moving iron core 220, making the movement of the moving iron core 220 stable and reducing the possibility of deviation.
[0037] In addition, by setting the outer dimension of the first guide hole 213 to be smaller than the outer dimension of the through hole 211, the moving iron core 220 can be separated from the inner wall of the through hole 211, thereby avoiding wear between the moving iron core 220 and the inner wall of the through hole 211, thus extending the service life of the moving iron core 220 and improving the reliability of the electromagnetic driver.
[0038] It should be noted that the first wear-resistant part 212 can be made of cast iron, copper, etc., which will not be elaborated here.
[0039] Specifically, refer to Figure 2 A second wear-resistant component 214 is fixedly connected to the end of the through hole 211 away from the first wear-resistant component 212. The second wear-resistant component 214 has a second guide hole 215, the outer dimension of which is smaller than that of the through hole 211. The moving iron core 220 is slidably connected to the second guide hole 215. The second wear-resistant component 214 is arranged at the end of the through hole 211 away from the first wear-resistant component 212. The second wear-resistant component 214 has a second guide hole 215. By setting the moving iron core 220 to be slidably connected to the second guide hole 215, the moving iron core 220 can move smoothly along the axial direction of the second guide hole 215, thereby guiding the movement direction of the moving iron core 220 and making its movement stable. Moreover, the outer dimension of the second guide hole 215 is smaller than that of the through hole 211, which separates the moving iron core 220 from the inner wall of the through hole 211, avoiding mutual wear and extending service life.
[0040] By setting the moving iron core 220 to pass through the first guide hole 213 and the second guide hole 215, the moving iron core 220 can be stably placed in the first wear-resistant part 212 and the second wear-resistant part 214. This not only separates the moving iron core 220 from the inner wall of the through hole 211, preventing wear between the moving iron core 220 and the inner wall of the through hole 211 and extending its service life, but also increases the support area of the moving iron core 220, making the movement of the moving iron core 220 more stable.
[0041] Specifically, refer to Figure 2 The end cover 120 is provided with a guide groove 121 along the axial direction of the moving iron core 220, and the moving iron core 220 is slidably connected to the guide groove 121. The guide groove 121 is arranged on the end cover 120 along the axial direction of the moving iron core 220. By setting the moving iron core 220 to slide smoothly along the length direction of the guide groove 121, the possibility of deviation is reduced, the moving iron core 220 can move stably, and the working accuracy and stability of the electromagnetic actuator are improved.
[0042] In addition, the first guide hole 213, the second guide hole 215 and the guide groove 121 work together to form a multi-guide structure, which can further precisely limit the movement trajectory of the moving iron core 220, so that the moving iron core 220 moves accurately along the axial direction during the sliding process, effectively avoiding abnormal movements such as swaying and shaking caused by uneven force or external interference, and improving the working stability of the electromagnetic actuator.
[0043] Specifically, refer to Figure 2 and Figure 3 The moving iron core 220 includes a central shaft 221 passing through a through hole 211. The middle part of the central shaft 221 is spaced apart from the inner wall of the through hole 211. The two ends of the central shaft 221 are supported on the fixed iron core 210 by a first wear-resistant member 212 and a second wear-resistant member 214, respectively. The first wear-resistant member 212 and the second wear-resistant member 214 are respectively arranged at both ends of the central shaft 221 so that the central shaft 221 can be supported in the fixed iron core 210. This not only balances the force on the central shaft 221 and reduces the possibility of positional displacement of the central shaft 221, but also enhances the stability and straightness of the movement of the moving iron core 220 and avoids the possibility of swaying or jamming of the moving iron core 220 during sliding. Furthermore, the spaced arrangement of the middle part of the central shaft 221 from the inner wall of the through hole 211 can reduce the wear of the central shaft 221, extend its service life, and improve the reliability of the electromagnetic actuator.
[0044] Specifically, refer to Figure 2 and Figure 3 The surface of the central shaft 221 has a nitrided layer (not shown in the attached figure). By providing a nitrided layer on the surface of the central shaft 221 of the moving iron core 220, the surface hardness of the central shaft 221 can be improved, giving the central shaft 221 stronger wear resistance. During sliding contact with the first wear-resistant part 212 and the second wear-resistant part 214, the wear on the surface of the central shaft 221 can be effectively reduced, extending the service life of the moving iron core 220.
[0045] Specifically, refer to Figure 2 and Figure 3The moving iron core 220 also includes a fixing block 222, a damping block 224, and an elastic element 227. The fixing block 222 is fixedly connected to the end of the central shaft 221 near the end cover 120. The fixing block 222 has a sliding groove 223. The damping block 224 is slidably connected to the sliding groove 223. The elastic element 227 is arranged between the central shaft 221 and the damping block 224. The elastic element 227 is used to drive the damping block 224 out of the sliding groove 223. The fixing block 222 is fixedly connected to the end of the central shaft 221 near the end cover 120, and the damping block 224 is slidably connected to the sliding groove 223. By setting the elastic element 227 between the central shaft 221 and the damping block 224, the elastic element 227 can drive the damping block 224 out of the sliding groove 223. When coil 232 is closed, the central shaft 221 moves away from the fixed iron core 210, causing the damping block 224 to abut against the end cover 120 and allowing the damping block 224 to retract into the slide groove 223. At the same time, the elastic element 227 is compressed, thereby reducing the impact between the damping block 224 and the end cover 120. This not only reduces the noise generated by the collision between the moving iron core 220 and the end cover 120, but also absorbs the kinetic energy of the reciprocating swing of the central shaft 221 caused by the impact, thus reducing the wear of the central shaft 221 and extending its service life.
[0046] Among them, the elastic element 227 can be a compression spring, a leaf spring, or a rubber or silicone component, etc., which are elastic elements and are not limited here.
[0047] Specifically, refer to Figure 2 The damping block 224 includes a main body 225 and two abutment portions 226. The main body 225 is slidably connected to a slide groove 223, and the two abutment portions 226 are respectively arranged at both ends of the main body 225. By slidably connecting the main body 225 to the slide groove 223, the main body 225 can smoothly slide along the axial direction of the slide groove 223, thereby improving the motion stability of the damping block 224.
[0048] In addition, one of the abutting parts 226 can abut against the central shaft 221, and the other abutting part 226 can abut against the end cover 120. The two abutting parts 226 can cooperate to limit the movement position of the damping block 224, so that the damping block 224 can move smoothly and improve the reliability of the moving iron core 220.
[0049] It should be noted that the bottom end of the fixing block 222 is provided with an opening for communicating with the sliding groove 223, so that the elastic element 227 can drive the abutment part 226 to extend out of the opening.
[0050] Understandably, referring to Figure 1The fixed iron core 210 has a second positioning groove 216, which surrounds the fixed iron core 210. A third sealing ring 217 is fitted into the second positioning groove 216. The second positioning groove 216 surrounds the fixed iron core 210. By placing the third sealing ring 217 in the second positioning groove 216, the position of the third sealing ring 217 can be stabilized. Moreover, the third sealing ring 217 can seal the through hole 211, preventing impurities from entering the mounting cavity 130 through the through hole 211, thereby improving the sealing performance of the electromagnetic actuator.
[0051] It should be noted that the electromagnetic actuator can be assembled with the engine via a bracket. By setting the third sealing ring 217, the connection position of the electromagnetic actuator can be kept sealed, thereby preventing impurities from entering, improving the sealing performance of the electromagnetic actuator, and reducing the possibility of failure.
[0052] The third sealing ring 217 can be an elastic component such as a rubber or silicone part to absorb gaps in the connection and improve sealing.
[0053] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.
Claims
1. Electromagnetic drive, characterized in that include: A housing mechanism includes an outer shell and an end cap. One end of the outer shell has a mounting hole, and the other end of the outer shell is fixedly connected to the end cap. The outer shell and the end cap form a mounting cavity. A fixed iron core is inserted into the mounting cavity through the mounting hole, and the fixed iron core has a through hole; The moving iron core is slidably disposed in the through hole; An electromagnetic component includes a winding frame and a coil. The winding frame is arranged in the mounting cavity, and the coil is disposed on the winding frame. The coil is used to generate a magnetic field to attract the moving iron core to move along the axial direction of the through hole towards the stationary iron core. The fixed iron core and the outer shell are sealed together at the mounting hole. The two ends of the winding frame are provided with first positioning grooves. The two first positioning grooves are respectively equipped with a first sealing ring and a second sealing ring. The first sealing ring abuts against the end face of the outer shell near the mounting hole, and the second sealing ring abuts against the end cover.
2. The electromagnetic driver of claim 1, wherein, A first wear-resistant component is fixedly connected to one end of the through hole facing the outside of the fixed iron core. The first wear-resistant component has a first guide hole. The outer dimension of the first guide hole is smaller than the outer dimension of the through hole. The moving iron core is slidably connected to the first guide hole.
3. The electromagnetic driver of claim 2, wherein, A second wear-resistant component is fixedly connected to the end of the through hole away from the first wear-resistant component. The second wear-resistant component has a second guide hole. The outer dimension of the second guide hole is smaller than the outer dimension of the through hole. The moving iron core is slidably connected to the second guide hole.
4. The electromagnetic drive of claim 1 or 3, wherein The end cap is provided with a guide groove along the axial direction of the moving iron core, and the moving iron core is slidably connected to the guide groove.
5. The electromagnetic driver according to claim 3, characterized in that, The moving iron core includes a central shaft passing through the through hole, the middle part of the central shaft being spaced apart from the inner wall of the through hole, and the two ends of the central shaft being supported on the fixed iron core by the first wear-resistant member and the second wear-resistant member, respectively.
6. The electromagnetic driver of claim 5, wherein, The surface of the central axis has a nitrided layer.
7. The electromagnetic driver of claim 5, wherein, The moving iron core also includes a fixing block, a damping block, and an elastic element. The fixing block is fixedly connected to the end of the central shaft near the end cover. The fixing block has a sliding groove. The damping block is slidably connected to the sliding groove. The elastic element is arranged between the central shaft and the damping block. The elastic element is used to drive the damping block to extend out of the sliding groove.
8. The electromagnetic driver of claim 7, wherein, The shock absorber includes a main body and two abutting parts. The main body is slidably connected to the groove, and the two abutting parts are respectively arranged at both ends of the main body.
9. The electromagnetic driver of claim 1, wherein, The fixed iron core has a second positioning groove, which is arranged around the fixed iron core, and a third sealing ring is fitted into the second positioning groove.