A circular electromagnet

Abstract

A circular electromagnet includes a shell, an iron core integrally formed within the shell, a wire frame disposed within the shell and fitted onto the iron core, an insulating cover disposed at the open end of the shell and fitted onto the iron core, and an external wire connected to the wire frame. The open end of the shell forms a stepped, circular stop that overlaps with the inner circumference of the shell. The insulating cover is disposed within the stop and its final position on the shell is defined. A downwardly extending connecting node is provided on the bottom surface of the shell from the stop. A connecting component is provided on the insulating cover that engages with the connecting node and prevents separation of the insulating cover from the shell after engagement. The connecting component and the connecting node are detachably connected. The principle of this invention lies in the detachable connection between the insulating cover and the shell, which is a threaded connection. This means that when replacing the insulating cover, only the connection between the two needs to be released, which is convenient and avoids tearing.

Description

Technical Field

[0001] This utility model relates to the field of electromagnet technology, and in particular to a circular electromagnet. Background Technology

[0002] A circular electromagnet is a device that uses the principle of electromagnetic induction to convert electrical energy into mechanical energy (magnetic force). Its core feature is that its iron core and coil are typically designed in a cylindrical or disc shape, hence its name. When an electric current passes through the coil inside, it generates a strong magnetic field, which attracts ferromagnetic objects (such as iron and steel); once the current is cut off, the magnetic field disappears, and the magnetic force also disappears.

[0003] Currently, the insulating cover used in existing circular electromagnets (the insulating cover is fitted onto the iron core and encloses the wire frame) is glued to the outer shell. Although gluing ensures the stability of the connection between the insulating cover and the outer shell, it has drawbacks, mainly in that it is not easy to replace. On the one hand, there is no way for the user to manually remove it; the user needs to use an auxiliary tool with a pointed tip to try to pinch up a raised crease on the surface of the insulating cover. Because the gluing reduces the flexibility of the insulating cover, it is necessary to try multiple times to break the glue coating before it can be removed. On the other hand, because the glue strength is strong enough, the insulating cover may be torn when it is removed. This is because the insulating cover is glued not only to the outer shell but also to the iron core. After tearing, part of the insulating cover remains on the iron core and the outer shell, which adds an extra cleaning step and requires complete removal of the glue residue, making it too cumbersome. Utility Model Content

[0004] This invention aims to overcome the shortcomings of the prior art by providing a circular electromagnet to solve the aforementioned problems.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: This circular electromagnet includes a shell, an iron core integrally formed inside the shell, a wire frame disposed inside the shell and fitted on the iron core, an insulating cover disposed at the open end of the shell and fitted on the iron core, and an external wire connected to the wire frame. The open end of the shell forms a stop that forms a stepped configuration with the inner circumference of the shell and is arranged in a circle. The insulating cover is disposed inside the stop and can limit its final placement position on the shell. The stop has a downwardly extending connection node on the bottom surface of the shell. The insulating cover is provided with a connecting component that combines with the connecting node and can prevent the insulating cover from separating from the shell after combination. The connecting component and the connecting node are detachably fitted.

[0006] Further improvements include a circular sealing groove on the iron core, into which the final insulating cover is placed.

[0007] Further improvements include a groove formed on the bottom surface of the housing and arranged in a ring, and an assembly space defined within the groove that allows the connecting components to enter. The inner circumferential surface of the groove has an internal thread structure. The connecting components include a connecting ring and several plugs disposed on the connecting ring for connecting the insulating cover. The outer circumferential surface of the connecting ring has an external thread structure. The connecting ring enters the assembly space through a threaded connection with the groove, thereby achieving the combination of the connecting node and the connecting components.

[0008] Further improvements include a circular groove on the side of the casing where the stop is located. The outer diameter of the groove is larger than the outer diameter of the stop on the side of the casing. When the insulating cover is placed inside the stop, it partially enters the groove.

[0009] Further improvements include an insulating cover comprising a main body and an extension extending from the main body. The main body is used to connect with the connecting ring and partially enter the embedded groove, while the extension is used to fill the stop.

[0010] Further improvements include the addition of several mounting holes on the connecting ring to clearly indicate the location of the plug, forming an I-shaped configuration. These mounting holes have internal threads that connect to the plug, and allow a portion of the insulating cover to be placed inside the mounting holes and connected to the plug.

[0011] Further improvements include the addition of plug-in posts at the lower end of the main body, with the same number and position of plugs. The plugs are inserted into the plug-in posts to connect the insulating cover and the connecting ring.

[0012] The beneficial effects of this utility model are:

[0013] 1. The insulating cover and the outer shell of this utility model are detachably connected and are connected by the groove and the thread of the connecting ring. That is, when replacing the insulating cover, it is only necessary to disconnect the connection between the two. Moreover, it has a fixed operation action. Compared with the traditional gluing method, it is more convenient to disassemble the insulating cover and will not produce tear marks.

[0014] 2. The insulating cover and the connecting ring of this utility model are interlocked, and the plug that is threadedly connected to the connecting ring is used as the interlocking part. The insulating cover is also provided with an additional insertion post that wraps around the plug after it is inserted, so that it can fill the groove of the thread, thereby generating a clamping force and enhancing the "hooking" effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0017] Figure 3This is a full cross-sectional structural diagram of the insulating cover and the outer shell of the connecting assembly of this utility model;

[0018] Figure 4 This utility model Figure 3 A magnified view of part A in the middle;

[0019] Figure 5 This is a full cross-sectional structural diagram of the insulating cover of the connecting assembly of this utility model;

[0020] Figure 6 This utility model Figure 5 A magnified view of part B in the diagram. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings:

[0022] Referring to the attached diagram: This circular electromagnet includes a housing 1, an iron core 2 integrally formed within the housing 1, a wire frame 6 disposed within the housing 1 and fitted onto the iron core 2, an insulating cover 3 disposed at the open end of the housing 1 and fitted onto the iron core 2, and an external wire 61 connected to the wire frame 6. The open end of the housing 1 forms a stop 11 that forms a stepped configuration with the inner circumference of the housing 1 and is arranged in a circle. The insulating cover 3 is disposed within the stop 11 and can limit its final placement position on the housing 1. The stop 11 has a downwardly extending connection node 4 on the bottom surface of the housing 1. The insulating cover 3 is provided with a connecting component 5 that engages with the connecting node 4 and can prevent the insulating cover 3 from separating from the housing 1 after engagement. The connecting component 5 and the connecting node 4 are detachably fitted. The principle of this utility model is that the insulating cover 3 is detachably set at the opening end of the outer shell 1. The stop 11 is specifically set based on the setting method of the insulating cover 3. On the one hand, it can quickly limit the final assembly position of the insulating cover 3 on the outer shell 1. That is, after setting, the upper end surface of the insulating cover 3 must be lower than the upper end surface of the iron core 2 and the upper end surface of the outer shell 1. This is to avoid the insulating cover 3 obstructing the contact between the upper end surface of the iron core 2 and the outer shell 1 and the magnetically attracted object. On the other hand, it is used to set the connecting node 4. Since the connecting node 4 extends downward, the connecting component 5 combined with the connecting node 4 will not affect the setting position of the insulating cover 3 after entering. At the same time, the connecting node 4 and the connecting component 5 are detachably connected. That is, when replacing the insulating cover 3, it is only necessary to disconnect the connection between the two. Moreover, it has a fixed operation action. Compared with the traditional gluing method, it is more convenient to disassemble the insulating cover 3 and will not produce tear marks.

[0023] The iron core 2 is provided with a ring-shaped sealing groove 21, which is used to house the partially installed insulating cover 3. The insulating cover 3 has a central insertion hole for the iron core 2 to pass through. The inner diameter of the insertion hole is slightly smaller than the outer diameter of the iron core 2. When the insulating cover 3 is fitted onto the iron core 2, it will be squeezed and deformed to adapt to the outer diameter of the iron core 2, thereby achieving a tight contact and ensuring a seal. However, this sealing method is not entirely suitable for environments with high flatness requirements. This deformation will inevitably cause other parts of the insulating cover 3 to bulge, which will affect the contact effect between the electromagnet and the object to be magnetically attracted. Therefore, a ring-shaped sealing groove 21 is provided on the iron core 2, that is, after the insulating cover 3 is in the final installation position, part of the insulating cover 3 will be placed into the sealing groove 21. The inner diameter of the sealing groove 21 is consistent with the inner diameter of the insertion hole of the insulating cover 3. This ensures both a sealed connection and the flatness of the insulating cover 3.

[0024] The connecting node 4 includes a groove 41 formed in a circular pattern on the bottom surface of the stop 11 on the outer shell 1, and an assembly space 42 defined within the groove 41 and allowing the connecting component 5 to enter. The inner circumferential surface of the groove 41 has an internal thread structure. The connecting component 5 includes a connecting ring 51 and several plugs 52 disposed on the connecting ring 51 for connecting the insulating cover 3. The outer circumferential surface of the connecting ring 51 has an external thread structure. The connecting ring 51 enters the assembly space 42 through a threaded connection with the groove 41, thereby achieving the combination of the connecting node 4 and the connecting component 5. The groove 41 is a recessed structure formed on the bottom surface of the stop 11 on the outer shell 1. The recess makes the simultaneously obtained assembly space 42 located below the bottom surface. Thus, the connecting ring 51 is also recessed after entering the groove 41, ensuring that the lower end face of the insulating cover 3 fits against the bottom surface of the stop 11 on the outer shell 1. Furthermore, a threaded structure is provided between the groove 41 and the connecting ring 51. This makes the connection between the two a threaded connection. The threaded connection not only ensures the stability of the connection, but also makes the disassembly and assembly process very convenient. Whether disassembling or assembling, the user only needs to press on the insulating cover 3 with multiple fingers, with the finger landing point on the connecting ring 51. Then, by applying downward pressure and combining it with the swing of the wrist, the connecting ring 51 is rotated to complete the disassembly or assembly. This operation method can also effectively overcome the resistance of the insulating cover 3 before it enters the sealing groove 21. When the insertion hole of the insulating cover 3 is fitted onto the iron core 2, the inner diameter is small, so the insertion hole needs to be turned outward to increase the inner diameter to adapt to the outer diameter of the iron core 2. Since this is also a deformation method, some resistance will inevitably be generated. The displacement of the insulating cover 3 is based on the threaded engagement of the connecting ring 51 and the groove 41. Rotation can overcome the static friction obstacle, making it easier for the rubber sheet to start moving. Once the relative movement starts, the dynamic friction is small, and the movement will be smoother.

[0025] The plug 52 is the connecting component between the connecting ring 51 and the insulating cover 3, and three are used. In this embodiment, the plug 52 is set as a screw, and the insulating cover 3 is made of rubber. The plug 52 and the connecting ring 51 are connected by a threaded connection, which can ensure the connection stability of the plug 52. The thread structure makes the thread tip of the plug 52 penetrate and hook part of the insulating cover 3 like a tiny "ring barb" when it is inserted. Moreover, the elasticity and deformation characteristics of the rubber can fill the groove of the thread, thereby generating a clamping force and enhancing the "hooking" effect. The plug 52 can be inserted into the insulating cover 3 by direct insertion or rotation, depending on the user's operating habits. Although some debris may remain in the groove of the thread after disassembly, this debris is easy to clean. It can be blown away by the air gun connected to the air compressor. This method is more convenient than the glue method, as it does not require waiting for the glue to solidify. When replacing the insulating cover 3, it is not necessary to clean the residue remaining on the connecting ring 51.

[0026] The stop 11 has a circular groove 111 on the side of the outer shell 1. The outer diameter of the groove 111 is larger than the outer diameter of the stop 11 on the side of the outer shell 1. When the insulating cover 3 is placed in the stop 11, it partially enters the groove 111. The function of the groove 111 is to enlarge the hole, that is, to expand the outer diameter of part of the stop 11. This is to avoid problems with the sealing connection between the insulating cover 3 and the iron core 2. Considering that the outer diameter of the insulating cover 3 matches the groove 111, the outer diameter of the insulating cover 3 must be larger than the inner diameter of the flared opening 11. Therefore, in order to facilitate passage, the outer edge of the insulating cover 3 can be folded down to achieve size adaptation. The displacement of the insulating cover 3 is based on the threaded engagement of the connecting ring 51 and the groove 41. Rotation can overcome the static friction barrier, making it easier for the insulating cover 3 to start moving. Once the relative movement starts, the dynamic friction is small and the movement will be smoother. After reaching the groove 111, the lower part of the insulating cover 3 will gradually return and enter.

[0027] The insulating cover 3 includes a main body 31 and an extension 32 extending from the main body 31. The main body 31 is used to connect with the connecting ring 51 and partially enter the embedded groove 111. The extension 32 is used to fill the stop 11. Considering that the embedded groove 111 is expanded, the embedded groove 111 and the stop 11 are in a stepped configuration. In order to enable the insulating cover 3 to fully close the opening end of the outer shell 1, the main body 31 and the extension 32 forming the insulating cover 3 are also in a stepped configuration, that is, the size is adapted to the size of the embedded groove 111 and the stop.

[0028] The connecting ring 51 is provided with several mounting holes 511 of an I-shape to define the position of the plug 52. The mounting holes 511 have internal threads and are threaded to the plug 52. They also allow part of the insulating cover 3 to be placed inside the mounting holes 511 and connected to the plug 52. The I-shaped mounting holes 511 consist of three parts: a large diameter section, a small diameter section, and a medium diameter section. The large diameter section is for the cap of the plug 52 to be placed inside. The small diameter section is not only interconnected with the large diameter section and the medium diameter section, but also has an internal thread structure to achieve threaded connection with the plug 52. The medium diameter section is for part of the insulating cover 3 to be placed inside, and also allows the screw part of the plug 52 that passes through the small diameter section to be placed inside. In this way, the plug 52 can be threaded to the connecting ring 51 and can also be inserted into the insulating cover 3.

[0029] The lower end of the main body 31 is provided with a number of plugs 52 in the same position and with the same number of insertion posts 311. The plugs 52 are inserted into the insertion posts 311 to connect the insulating cover 3 and the connecting ring 51. The insertion posts 311 allow the insulating cover 3 to have an extra part that can enter the middle diameter section of the mounting hole 511. The main body 31 of the insulating cover 3 does not need to be recessed (recession would affect the flatness). Moreover, after the plugs 52 are inserted into the insertion posts 311, they will be wrapped by the insertion posts 311, so that they can fill the groove of the thread, thereby generating a clamping force and enhancing the "hooking" effect.

[0030] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. A circular electromagnet, comprising a housing (1), an iron core (2) integrally formed within the housing (1), a wire frame (6) disposed within the housing (1) and fitted onto the iron core (2), an insulating cover (3) disposed at the open end of the housing (1) and fitted onto the iron core (2), and an external wire (61) connected to the wire frame (6), characterized in that: The opening end of the outer shell (1) is formed with a stop (11) that forms a stepped configuration with the inner cavity circumference of the outer shell (1) and is arranged in a circle. The insulating cover (3) is disposed in the stop (11) and can limit its final placement position on the outer shell (1). The stop (11) is provided with a downwardly extending connection node (4) on the bottom surface of the outer shell (1). The insulating cover (3) is provided with a connection component (5) that is combined with the connection node (4) and can prevent the insulating cover (3) from separating from the outer shell (1) after being combined. The connection component (5) and the connection node (4) are detachably fitted.

2. The circular electromagnet according to claim 1, characterized in that: The iron core (2) is provided with a ring-shaped sealing groove (21), which is provided for the insulating cover (3) located in the final part of the installation to be placed inside.

3. The circular electromagnet according to claim 1, characterized in that: The connection node (4) includes a groove (41) formed on the bottom surface of the housing (1) on the stop (11) and arranged in a circle, and an assembly space (42) defined within the groove (41) and allowing the connection assembly (5) to enter. The inner circumferential surface of the groove (41) has an internal thread structure. The connection assembly (5) includes a connecting ring (51) and a plurality of plugs (52) disposed on the connecting ring (51) and used to connect the insulating cover (3). The outer circumferential surface of the connecting ring (51) has an external thread structure. The connection ring (51) enters the assembly space (42) by threading into the groove (41) to realize the combination of the connection node (4) and the connection assembly (5).

4. The circular electromagnet according to claim 3, characterized in that: The stop (11) has a circular groove (111) on the side of the outer shell (1). The outer diameter of the groove (111) is larger than the outer diameter of the stop (11) on the side of the outer shell (1). When the insulating cover (3) is placed in the stop (11), it partially enters the groove (111).

5. The circular electromagnet according to claim 4, characterized in that: The insulating cover (3) includes a body (31) and an extension (32) extending from the body (31). The body (31) is used to connect with the connecting ring (51) and partially enter the recess (111). The extension (32) is used to fill the stop (11).

6. The circular electromagnet according to claim 5, characterized in that: The connecting ring (51) is provided with a plurality of mounting holes (511) in the shape of an I-beam to indicate the position of the plug (52). The mounting holes (511) have an internal thread structure and are threadedly connected to the plug (52), and allow part of the insulating cover (3) to be placed in the mounting holes (511) and connected to the plug (52).

7. The circular electromagnet according to claim 6, characterized in that: The lower end of the main body (31) is provided with a number of plugs (52) in the same position as the insertion post (311). The plugs (52) are inserted into the insertion post (311) to realize the connection between the insulating cover (3) and the connecting ring (51).

Images