Electromagnetic push rod
By designing a matching structure of sliding magnets and multiple coil components in the electromagnetic push rod, the problem of insufficient thrust in the existing electromagnetic push rod in miniaturization is solved, and the effect of providing greater thrust in miniaturization equipment is achieved.
Patent Information
- Application Number
- CN202421864517.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-02
- Publication Date
- 2025-05-20
- Estimated Expiration
- 2034-08-02
AI Technical Summary
The existing electromagnetic push rods are difficult to provide large thrust while miniaturizing, and cannot meet the high requirements of high-efficiency production and industrial automation for speed and accuracy.
An electromagnetic push rod is designed, including a housing, a sliding magnet, a first coil assembly and a second coil assembly, and the two sets of coil assembly cooperate to exert force to allow the sliding magnet to move stably in the guide groove, thereby providing greater thrust at a smaller size.
It provides greater thrust in miniaturized electromagnetic push rods, meets the high requirements for speed and accuracy of industrial automation, and is conducive to the application of electromagnetic push rods in small equipment and instruments.
Smart Images
Figure CN222888047U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field related to push rods, in particular to an electromagnetic push rod. Background Art
[0002] With the transformation of industrial automation and industrial structure, motors are increasingly widely used in modern society. Whether in production and life, or in national defense, military, aerospace and other fields, motors play a crucial role.
[0003] Machine tools, assembly lines, testing equipment, and household appliances such as electric fans, refrigerators, washing machines, range hoods, vacuum cleaners, etc. all rely on motors. With the gradual formation of the high-efficiency production mode of industrial automation, many industrial assembly lines have higher and higher speed requirements for motors. However, many existing motors are difficult to meet the needs of these high-efficiency productions in terms of speed.
[0004] To solve this problem, some assembly lines have started to use air cylinders. Although air cylinders can meet the requirements in terms of speed, there are certain difficulties in real-time position control, and they require an external air source and have disadvantages such as high noise. This has promoted the development of motor technology to meet the needs of higher speed, higher precision and higher efficiency to meet the requirements of industrial automation.
[0005] An electromagnetic push rod is a device that converts electrical energy into mechanical energy. It uses electromagnetic principles to generate thrust or pull. An electromagnetic push rod usually consists of a fixed electromagnet and a movable push rod. When powered on, the electromagnet generates a magnetic force to attract the push rod and make it move; when powered off, the push rod returns to its original position under the action of spring force or gravity.
[0006] Miniaturization is one of the development directions of electromagnetic push rods. Existing electromagnetic push rods are difficult to provide a large thrust while being miniaturized. Summary of the Utility Model
[0007] The purpose of the utility model is to provide an electromagnetic push rod so that the electromagnetic push rod has a large thrust while being miniaturized.
[0008] To solve the above technical problems, the utility model provides an electromagnetic push rod.
[0009] The electromagnetic push rod of the utility model includes a housing and a sliding magnet, a first coil assembly and a second coil assembly arranged in the housing;
[0010] The first coil assembly and the second coil assembly are respectively arranged on both sides of the sliding magnet. The first coil assembly includes a first coil and a first magnetic core arranged in the first coil. The second coil assembly includes a second coil and a second magnetic core arranged in the second coil;
[0011] The housing has a guiding groove for the reciprocating movement of the sliding magnet;
[0012] It further includes a pushing member. The sliding magnet is connected to the pushing member to drive the reciprocating movement of the pushing member, and one end of the pushing member extends out of the housing.
[0013] Furthermore, there are two first coils arranged at intervals along the movement direction of the sliding magnet, and there are two second coils arranged at intervals along the movement direction of the sliding magnet.
[0014] Furthermore, the first magnetic core includes a first part and a second part connected together, and the first part and the second part are respectively located in the two first coils; the second magnetic core includes a third part and a fourth part connected together, and the third part and the fourth part are respectively located in the two second coils.
[0015] Furthermore, both the first magnetic core and the second magnetic core are U-shaped.
[0016] Furthermore, a plastic housing is arranged on the outer peripheral surface of the sliding magnet, and one end of the plastic housing is connected to the pushing member.
[0017] Furthermore, two guiding plates arranged at intervals and extending along the guiding groove are arranged in the guiding groove, and the plastic housing is slidably arranged in the gap between the two guiding plates.
[0018] Furthermore, an observation hole is arranged on the housing, and the observation hole communicates with the guiding groove.
[0019] Furthermore, it further includes a PCB board and a circuit module. The PCB board is fixedly connected to the housing, and the circuit module is arranged on the PCB board.
[0020] Furthermore, the circuit module includes a micro control unit, a driving chip and a linear voltage regulator. The micro control unit is electrically connected to the driving chip, the driving chip is electrically connected to the first coil and the second coil, the micro control unit controls the current in the first coil and the second coil through the driving chip, and the linear voltage regulator is used to supply power to the micro control unit.
[0021] Furthermore, the circuit module further includes a digital transistor, and the digital transistor is used for input detection to provide a control signal to the micro control unit.
[0022] Compared with the prior art, the utility model has at least the following beneficial effects:
[0023] A coil assembly is arranged on each side of the sliding magnet. After being electrified, the magnetic field generated by the coil and the magnetic core inside it can make the sliding magnet move in the guiding groove. The cooperation of the two coil assemblies can exert a greater force on the sliding magnet and make the coil move stably. Thus, with a smaller number of coil turns and size, the sliding magnet can provide a greater thrust, which is beneficial to the miniaturization of the electromagnetic push rod. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 FIG. 1 is a schematic structural diagram of an embodiment of an electromagnetic push rod of the present invention;
[0025] Figure 2 FIG. 2 Figure 1 is a schematic structural diagram of the electromagnetic push rod in FIG. 1 with the housing hidden;
[0026] Figure 3 FIG. 3 Figure 2 is a schematic structural diagram of the electromagnetic push rod in FIG. 1 with the PCB board and the second coil hidden;
[0027] Figure 4 FIG. 4 Figure 3 is a schematic structural diagram of the electromagnetic push rod in FIG. 1 with the plastic housing and the pushing member hidden;
[0028] Figure 5 FIG. 5 Figure 1 is a circuit diagram of the circuit module of the electromagnetic push rod in FIG. 1.
[0029] 100, housing; 110, observation hole;
[0030] 210, sliding magnet; 220, plastic housing; 230, pushing member;
[0031] 310, first coil; 320, first magnetic core; 330, second coil; 340, second magnetic core;
[0032] 400, guiding plate;
[0033] 500, PCB board. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0034] The following will describe an electromagnetic push rod of the present invention with reference to the schematic diagrams, in which the preferred embodiments of the present invention are shown. It should be understood that those skilled in the art can modify the present invention described herein while still achieving the advantageous effects of the present invention. Therefore, the following description should be understood as a broad guidance for those skilled in the art and not as a limitation to the present invention.
[0035] The serial numbers assigned to the components in this text itself, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meaning. And the "connection" and "coupling" mentioned in this application, unless otherwise specified, both include direct and indirect connection (coupling). In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present utility model.
[0036] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.
[0037] In the following paragraphs, the present utility model will be described more specifically by way of example with reference to the drawings. According to the following description and the claims, the advantages and features of the present utility model will be clearer. It should be noted that the drawings are all in a very simplified form and use non-precise scales, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present utility model.
[0038] The following combines the description of the specification Figure 1 to the appendix Figure 5 , and introduces the electromagnetic push rod of the present utility model.
[0039] In one of the embodiments, as Figure 1 , Figure 2 and Figure 4 shown, the electromagnetic push rod includes a housing 100 and a sliding magnet 210, a first coil assembly and a second coil assembly provided in the housing 100.
[0040] The first coil assembly and the second coil assembly are respectively arranged on both sides of the sliding magnet 210. The first coil assembly includes a first coil 310 and a first magnetic core 320 arranged in the first coil 310. The second coil assembly includes a second coil 330 and a second magnetic core 340 arranged in the second coil 330. A guiding groove for the reciprocating movement of the sliding magnet 210 is provided in the housing 100.
[0041] The electromagnetic push rod further includes a pushing member 230. The sliding magnet 210 is connected to the pushing member 230 to drive the pushing member 230 to reciprocate. One end of the pushing member 230 extends out of the housing 100. The structure of the pushing member 230 can be set according to requirements to drive other mechanical components. For example, threaded holes can be provided on the fixed pushing member for connecting to other mechanical components by means of threaded connection, thereby driving the movement of other mechanical components.
[0042] A coil assembly is arranged on each side of the sliding magnet 210. After being energized, the magnetic field generated by the coil and the magnetic core inside it can make the sliding magnet 210 move in the guiding groove. The cooperation of the two coil assemblies can apply a greater force to the sliding magnet 210 and enable the coil to move stably. Thus, with fewer coil turns and smaller size, the sliding magnet 210 can provide a greater thrust, which is beneficial to the miniaturization of the electromagnetic push rod.
[0043] To further improve the thrust of the electromagnetic push rod, there are two first coils 310 arranged at intervals along the movement direction of the sliding magnet 210, and there are two second coils 330 arranged at intervals along the movement direction of the sliding magnet 210. Of course, in other embodiments, three first coils 310 and three second coils 330 can also be provided, or four first coils 310 and four second coils 330 can be provided.
[0044] Further, in one embodiment, the first magnetic core 320 includes a first part and a second part connected together. The first part and the second part are respectively located in the two first coils 310; the second magnetic core 340 includes a third part and a fourth part connected together. The third part and the fourth part are respectively located in the two second coils 330. That is, two first coils 310 share one first magnetic core 320, and two second coils 330 share one second magnetic core 340. Since a continuous magnetic core is used, a synergistic cooperation effect can be achieved. Compared with configuring an independent magnetic core for each coil, this structure of multiple coils sharing one magnetic core can provide a greater force to the sliding magnet 210, thereby enabling the electromagnetic push rod to have a greater thrust, which is beneficial to the miniaturization of the electromagnetic push rod.
[0045] Preferably, asFigure 2 and Figure 3 As shown in Figure 3 , both the first magnetic core 320 and the second magnetic core 340 are U-shaped. The two overhanging arms of the U-shaped first magnetic core 320 serve as the first part and the second part respectively, and are respectively inserted into the two first coils 310. The two overhanging arms of the U-shaped second magnetic core 340 serve as the third part and the fourth part respectively, and are respectively inserted into the two second coils 330.
[0046] In other embodiments, two first magnetic cores 320 may also be provided and inserted into the two first coils 310 correspondingly, and two second magnetic cores 340 may be provided and inserted into the two second coils 330 correspondingly.
[0047] In one embodiment, as Figure 2 and Figure 4 shown, a plastic housing 220 is provided on the outer peripheral surface of the sliding magnet 210, and one end of the plastic housing 220 is connected to the pushing member 230. Providing the plastic housing 220 outside the sliding magnet 210 can reduce the frictional resistance encountered during the sliding of the sliding magnet 210, thereby increasing the thrust output by the electromagnetic push rod. Preferably, the plastic housing 220 can be made of polytetrafluoroethylene material.
[0048] To further reduce the frictional resistance encountered by the sliding magnet 210, as Figure 2 and Figure 3 shown, two guiding plates 400 are provided in the guiding groove, which are arranged at intervals and extend along the guiding groove. The plastic housing 220 is slidably arranged in the gap between the two guiding plates 400. Specifically, both of the two guiding plates 400 are L-shaped plates and are also made of polytetrafluoroethylene material. Among them, the gap between the two plastic housings 220 is slightly wider than the plastic housing 220, so that the plastic housing 220 can freely guide and slide in the gap between the two guiding plates 400. In other embodiments, only one U-shaped plate may also be provided, and the groove of the U-shaped plate can accommodate the plastic housing 220 to enable the plastic housing 220 to guide and slide.
[0049] Preferably, the first coil assembly and the second coil assembly are symmetrically arranged on both sides of the sliding magnet 210, so that the sliding magnet 210 can move more stably.
[0050] In one embodiment, an observation hole 110 is provided on the housing 100, and the observation hole 110 communicates with the guiding groove, so that the sliding magnet 210 and the external plastic housing 220 are exposed. Of course, if the plastic housing 220 completely wraps the sliding magnet 210, only the plastic housing 220 is exposed. Providing the observation hole 110 is convenient for observing the movement of the sliding magnet 210 on the one hand, and can reduce the frictional force received by the sliding magnet 210 during movement on the other hand.
[0051] In one embodiment, it further includes a PCB board 500 and a circuit module. The PCB board 500 is fixedly connected to the housing 100, and the circuit module is disposed on the PCB board 500.
[0052] Specifically, the circuit module includes a microcontroller unit (MCU, Micro Controller Unit), a driver chip, and a linear voltage regulator. The microcontroller unit is electrically connected to the driver chip, and the driver chip is electrically connected to the first coil and the second coil. Preferably, the driver chip can specifically be a DC motor driver chip. The microcontroller unit controls the current in the first coil and the second coil through the driver chip. By changing the direction of the current, the movement direction of the sliding magnet can be changed. The linear voltage regulator is used to supply power to the microcontroller unit. The circuit module further includes a digital transistor, and the digital transistor is used for input detection to provide a control signal to the microcontroller unit. Preferably, the digital transistor can be a dual digital transistor.
[0053] The circuit diagram of the circuit module is as Figure 5 shown. In Figure 5 , U1 is a low-power linear voltage regulator for supplying power to the logic part of the driving IC of the microcontroller unit; U2 is the microcontroller unit; U3 is the driver chip, and this driver chip can specifically be a DC motor driver chip, so that under the control of the microcontroller unit, the sliding magnet reciprocates; U4 is a dual digital transistor; JP1 is a reserved wiring terminal; JP2 is the first coil and the second coil; JP3 is the programming port for the code, so as to facilitate developers to transfer the written program or firmware into the circuit module.
[0054] As an example, in one specific embodiment, without considering the size of the pusher, only considering the housing and the PCB board, the length of the electromagnetic pusher is 15.5 mm, the width is 12 mm, and the height is 3.1 mm. The size of the sliding magnet used is 1.5 mm × 1.5 mm × 5 mm. Two coils are arranged on each side of the sliding magnet, and the two coils on each side share a U-shaped magnetic core. Each coil is wound about 80 turns. The cross-section of the wire used for winding the coil is rectangular, and the size of its cross-section is 40 μm × 150 μm. The overall size is small. Compared with electromagnetic pushers of the same specification, it can provide a greater thrust and can be applied to various small devices and instruments, such as precision positioning devices, small robots, medical devices, aerospace control systems, etc.
[0055] Obviously, those skilled in the art can make various modifications and variations to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and their equivalent technologies, the present utility model is also intended to include these modifications and variations.
Claims
1. An electromagnetic push rod, characterized in that: It includes a housing and a sliding magnet, a first coil assembly and a second coil assembly arranged in the housing; The first coil assembly and the second coil assembly are respectively arranged on both sides of the sliding magnet, the first coil assembly includes a first coil and a first magnetic core arranged in the first coil, and the second coil assembly includes a second coil and a second magnetic core arranged in the second coil; The housing is provided with a guide groove for the sliding magnet to reciprocate; It also includes a pushing piece, the sliding magnet is connected to the pushing piece to drive the pushing piece to reciprocate, and one end of the pushing piece extends out of the shell.
2. The electromagnetic push rod according to claim 1, characterized in that: There are two first coils and they are arranged at intervals along the moving direction of the sliding magnet; there are two second coils and they are arranged at intervals along the moving direction of the sliding magnet.
3. The electromagnetic push rod according to claim 2, characterized in that: The first magnetic core includes a first part and a second part connected together, and the first part and the second part are respectively located in the two first coils; the second magnetic core includes a third part and a fourth part connected together, and the third part and the fourth part are respectively located in the two second coils.
4. The electromagnetic push rod according to claim 3, characterized in that: The first magnetic core and the second magnetic core are both U-shaped.
5. The electromagnetic push rod according to claim 1, characterized in that: A plastic shell is arranged on the outer peripheral surface of the sliding magnet, and one end of the plastic shell is connected to the pushing member.
6. The electromagnetic push rod according to claim 5, characterized in that: The guide groove is provided with two guide plates which are arranged at intervals and extend along the guide groove, and the plastic shell is slidably arranged in the gap between the two guide plates.
7. The electromagnetic push rod according to claim 1, characterized in that: The shell is provided with an observation hole, and the observation hole is communicated with the guide groove.
8. The electromagnetic push rod according to claim 1, characterized in that: It also includes a PCB board and a circuit module. The PCB board is fixedly connected to the housing, and the circuit module is arranged on the PCB board.
9. The electromagnetic push rod according to claim 8, characterized in that: The circuit module includes a microcontroller unit, a driving chip and a linear regulator. The microcontroller unit is electrically connected to the driving chip, and the driving chip is electrically connected to the first coil and the second coil. The microcontroller unit controls the current in the first coil and the second coil through the driving chip, and the linear regulator is used to power the microcontroller unit.
10. The electromagnetic push rod according to claim 9, characterized in that: The circuit module further comprises a digital transistor, and the digital transistor is used for input detection to provide a control signal to the micro control unit.