Electromagnet

Abstract

The utility model relates to the technical field of electromagnets, in particular to an electromagnet. The electromagnet comprises a shell, a coil, a limiting ring and an unclosed reducing ring, an inner hole is formed in the shell, and the limiting ring is arranged in the inner hole. Locking arcs and releasing arcs are alternately arranged on the inner side of the limiting ring in the circumferential direction, and the diameters of the locking arcs, the inner hole and the releasing arcs are sequentially reduced. And the variable-diameter ring is elastically sleeved on the periphery of the coil. The coil is installed in the inner hole in an inserted mode and can rotate to the assembling position and the disassembling position in the circumferential direction of the shell, and when the coil is located at the assembling position, the outer ring of the variable-diameter ring abuts against the locking arc. When the coil is located at the dismounting position, the outer ring of the reducing ring abuts against the release arc. When the coil rotates to the dismounting position in the circumferential direction of the shell, the outer ring of the variable-diameter ring abuts against the release arc so that the coil can be conveniently pulled out of the inner hole, detachable installation of the coil and the shell is achieved, dismounting and mounting of the coil are easy and convenient, the dismounting and mounting efficiency of the coil is improved, and the maintenance cost of the electromagnet is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electromagnet, especially a kind of electromagnet. BACKGROUND

[0002] Electromagnet is a kind of electrical execution device that converts electrical energy into mechanical energy to complete command action, compared with mechanical device or hydraulic device, electromagnet has the advantages of fast response time, large electromagnetic attraction, small size and light weight, and is widely used in industrial automation field.

[0003] In the existing electromagnet, the shell in the magnetic core tube assembly is integrally arranged with the coil (shell) to enhance the connection strength of the coil and the shell. Limited by the installation mode of the coil, when the coil needs to be replaced and maintained, not only is it inconvenient to disassemble and assemble, but also the shell and the coil need to be replaced or scrapped, which increases the maintenance cost of the electromagnet. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of electromagnet, to realize the detachable assembly of coil, improve the disassembly and assembly efficiency of coil, reduce the maintenance cost of electromagnet.

[0005] To achieve this purpose, the technical scheme adopted by the utility model is:

[0006] Electromagnet, including shell, coil, limit ring and not closed variable-diameter ring, the inner hole is set in the shell, the limit ring is set in the inner hole;The inner side of the limit ring is alternately provided with locking arc and release arc along the circumference, the diameter of the locking arc, the inner hole and the release arc decreases in turn;The variable-diameter ring is elastically sleeved on the outer periphery of the coil;

[0007] The coil is inserted and installed in the inner hole and can rotate to assembly position and disassembly position along the circumference of the shell, when the coil is located at the assembly position, the outer circle of the variable-diameter ring is tightly closed to the locking arc;When the coil is located at the disassembly position, the outer circle of the variable-diameter ring is tightly closed to the release arc.

[0008] As an optional scheme of electromagnet, the inner side wall of the inner hole is provided with first installation slot along the circumference, and the limit ring is installed in the first installation slot;The locking arc is located in the first installation slot, and the release arc protrudes from the first installation slot and protrudes from the inner side wall of the inner hole.

[0009] As an optional scheme of electromagnet, the inner side of the limit ring is further provided with a guide surface, and the guide surface is provided between adjacent locking arc and release arc;

[0010] One end of the guide surface is connected with one end of the corresponding locking arc, and the other end of the guide surface is connected with one end of the corresponding release arc.

[0011] As an alternative to the electromagnet, the guide surface is connected with the adjacent locking arc and release arc smoothly.

[0012] As an alternative to the electromagnet, the limiting ring is an open ring, and the outer circumferential surface of the limiting ring is elastically pressed against the bottom wall of the first mounting groove.

[0013] As an alternative to the electromagnet, the limiting ring has a first end and a second end arranged at intervals, and two through holes are formed in the limiting ring, and the two through holes are arranged adjacent to the first end and the second end, respectively.

[0014] As an alternative to the electromagnet, the locking arc and the release arc are concentrically arranged, and the arc length of the locking arc is greater than the arc length of the release arc.

[0015] As an alternative to the electromagnet, the central angle α corresponding to the arc length of the locking arc is 55°-75°, and the central angle β corresponding to the arc length of the release arc is 25°-45°.

[0016] As an alternative to the electromagnet, the inner side wall of the inner hole is integrally provided with the limiting ring.

[0017] As an alternative to the electromagnet, the variable-diameter ring comprises alternating flange portions and flat portions; the outer periphery of the coil is provided with a second mounting groove in the circumferential direction, the variable-diameter ring is elastically sleeved in the second mounting groove, the flat portion is located in the second mounting groove, and the flange portion protrudes out of the second mounting groove and protrudes out of the outer circumferential surface of the coil.

[0018] When the coil is in the assembled position, the flange portion abuts against the locking arc; when the coil is in the disassembled position, the flange portion abuts against the release arc.

[0019] The beneficial effects of the utility model are as follows:

[0020] The electromagnet provided by the utility model comprises a shell, a coil, a limiting ring and an unclosed variable-diameter ring, when the coil is inserted and installed in the inner hole and located at the assembling position, the outer ring of the variable-diameter ring is abutted to the locking arc, when the coil is rotated along the circumference of the shell to the disassembling position, the outer ring of the variable-diameter ring is abutted to the releasing arc, so as to pull out the coil from the inner hole, and the detachable installation of the coil and the shell is realized. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is the structural exploded schematic view of the electromagnet provided by the utility model embodiment one;

[0022] Figure 2 is the cooperation structure schematic view of the limiting ring and the variable-diameter ring when the coil is located at the assembling position provided by the utility model embodiment one;

[0023] Figure 3 is the structural schematic view of the limiting ring provided by the utility model embodiment one;

[0024] Figure 4 is the structural schematic view of the limiting ring provided by the utility model embodiment two.

[0025] The component names and numbers in the drawing are as follows:

[0026] 1, shell;11, inner hole;111, first installation groove;2, coil;21, second installation groove;3, limiting ring;31, locking arc;32, releasing arc;33, guide surface;34, first end;35, second end;36, through hole;4, variable-diameter ring;41, flange part;42, straight part. DETAILED DESCRIPTION

[0027] In order to make the technical problems solved by the utility model, the technical scheme adopted and the technical effects reached more clear, the technical scheme of the utility model is further illustrated by specific implementation manners below in combination with the drawings. It can be understood that the specific embodiments described here are only used for explaining the utility model, not limiting the utility model. In addition, it needs to be explained that, in order to facilitate the description, only the parts related to the utility model are shown in the drawings, not all.

[0028] In the description of the utility model, unless another definite provision and limitation, the term "link", "connect", "fix" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can pass through the intermediate medium indirectly connected, can be two element internal communication or two element mutual action relation.For the ordinary skilled in the art, the above-mentioned terms can be understood in the utility model according to the specific meaning of the specific circumstances.

[0029] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include the first and second features direct contact, also can include the first and second features are not direct contact but contact through the additional feature between them.Moreover, the first feature is "on", "above" and "on" the second feature includes the first feature is directly above and obliquely above the second feature, or just indicates that the horizontal height of the first feature is higher than the second feature.The first feature is "under", "below" and "under" the second feature includes the first feature is directly below and obliquely below the second feature, or just indicates that the horizontal height of the first feature is less than the second feature.

[0030] In the description of the embodiment, the orientation or position relationship of the terms "on", "under", "right", "left" and the like is based on the orientation or position relationship shown in the drawing, only for the convenience of description and simplification operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model.In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0031] The technical scheme of the utility model will be further illustrated below by specific embodiments in conjunction with the drawings.

[0032] Embodiment one

[0033] In the existing electromagnet, the shell in the magnetic core tube assembly is integrally arranged with the coil to enhance the connection strength of the coil and the shell.Restricted by the installation mode of the coil, when the coil needs to be replaced and maintained, not only is it inconvenient to disassemble and assemble, but also the shell and the coil need to be replaced or scrapped, which increases the maintenance cost of the electromagnet.

[0034] To solve the above problems, such as Figures 1-3As shown, the embodiment also includes an electromagnet, which includes a shell 1, a coil 2, a limiting ring 3 and an unclosed variable-diameter ring 4, the shell 1 is provided with an inner hole 11, and the limiting ring 3 is arranged in the inner hole 11. The inner side of the limiting ring 3 is alternately provided with locking arcs 31 and release arcs 32 in the circumferential direction, and the diameters of the locking arcs 31, the inner hole 11 and the release arcs 32 decrease in turn. The variable-diameter ring 4 is elastically sleeved on the outer periphery of the coil 2. The coil 2 is plug-in installed in the inner hole 11 and can rotate to an assembly position and a disassembly position along the circumferential direction of the shell 1. When the coil 2 is located at the assembly position, the outer circle of the variable-diameter ring 4 abuts against the locking arc 31; when the coil 2 is located at the disassembly position, the outer circle of the variable-diameter ring 4 abuts against the release arc 32. When the coil 2 is plug-in installed in the inner hole 11 and located at the assembly position, the outer circle of the variable-diameter ring 4 abuts against the locking arc 31; when the coil 2 rotates to the disassembly position along the circumferential direction of the shell 1, the outer circle of the variable-diameter ring 4 abuts against the release arc 32, so as to pull out the coil 2 from the inner hole 11, realizing the detachable installation of the coil 2 and the shell 1. By rotating the coil 2, the variable-diameter ring 4 is rotated from the locking arc 31 to the release arc 32, so that the coil 2 is separated from the shell 1, and the disassembly operation of the coil 2 is simple and easy to operate, facilitating the replacement and maintenance of the coil 2, improving the disassembly efficiency of the coil 2 and reducing the maintenance cost of the electromagnet.

[0035] As shown in Figure 1 and Figure 2 , the inner side wall of the inner hole 11 is provided with a first installation groove 111 in the circumferential direction, and the limiting ring 3 is installed in the first installation groove 111. The locking arc 31 is located in the first installation groove 111, and the release arc 32 protrudes out of the first installation groove 111 and protrudes out of the inner side wall of the inner hole 11. The limiting ring 3 is installed in the first installation groove 111, realizing the stable installation of the limiting ring 3. Since the locking arc 31 is located in the first installation groove 111, when the coil 2 is plug-in installed in the inner hole 11, the variable-diameter ring 4 extends into the first installation groove 111 and abuts against the locking arc 31, so that the side wall of the first installation groove 111 axially limits the variable-diameter ring 4, realizing the positioning installation of the coil 2 in the axial direction, avoiding the coil 2 from sliding out of the inner hole 11.

[0036] As shown in Figure 2 and Figure 3As shown, the limiting ring 3 is an unclosed ring body, and the outer circumferential surface of the limiting ring 3 elastically abuts against the bottom wall of the first mounting groove 111. The limiting ring 3 of the present embodiment is a clasp spring, so that the limiting ring 3 can be elastically deformed, thereby flexibly adjusting the inner diameter of the limiting ring 3. The diameter of the limiting ring 3 in a natural state (not subjected to external force) (i.e. the outer diameter of the limiting ring 3) is greater than the diameters of the inner hole 11 and the first mounting groove 111. When the limiting ring 3 is mounted in the first mounting groove 111, the limiting ring 3 needs to be contracted to be not greater than the diameter of the inner hole 11, so that the limiting ring 3 extends into the inner hole 11 and is mounted in the first mounting groove 111. When the external force on the limiting ring 3 is removed, the limiting ring 3 is compressed and mounted in the first mounting groove 111, at this time, the limiting ring 3 abuts tightly against the bottom wall of the first mounting groove 111 under the action of the elastic restoring force of the limiting ring 3 itself, thereby realizing the fixed assembly of the shell 1 and the limiting ring 3, avoiding the position movement of the limiting ring 3 due to the rotation of the variable-diameter ring 4, and ensuring the reliability of the coil 2 dismounting operation.

[0037] Further, the limiting ring 3 has a first end 34 and a second end 35 arranged at intervals, and two through holes 36 are formed in the limiting ring 3 and arranged adjacent to the first end 34 and the second end 35 respectively. The two through holes 36 are arranged near the first end 34 and the second end 35 respectively, so that the two jaws of the clasp spring pincer can extend into the two through holes 36 respectively, so as to clamp the limiting ring 3 and realize the convenient mounting of the limiting ring 3.

[0038] As shown in Figure 2 and Figure 3 , the inner side of the limiting ring 3 is alternately provided with three locking arcs 31 and three releasing arcs 32 in the circumferential direction, and one of the locking arcs 31 separates and forms the first end 34 and the second end 35. When the coil 2 is in the assembly position, the outer circle of the variable-diameter ring 4 abuts against the three locking arcs 31 respectively; when the coil 2 is in the disassembly position, the outer circle of the variable-diameter ring 4 abuts against the three releasing arcs 32 respectively. When the coil 2 rotates from the assembly position to the disassembly position, the variable-diameter ring 4 rotates synchronously with the coil 2 and rotates from the locking arc 31 to the releasing arc 32, at this time, the variable-diameter ring 4 contracts and the diameter becomes smaller. In other embodiments, the number of locking arcs 31 and releasing arcs 32 can also be flexibly adjusted, which is not limited here.

[0039] Specifically, the locking arc 31 and the releasing arc 32 are concentrically arranged, and the arc length of the locking arc 31 is greater than the arc length of the releasing arc 32. Through the above arrangement, the arc length of the locking arc 31 is longer, which increases the contact area between the limiting ring 3 and the variable-diameter ring 4 when the coil 2 is in the assembly position, so that the limiting ring 3 is stably clamped in the limiting ring 3, and the assembly strength and stability of the shell 1 and the coil 2 are improved.

[0040] In the present embodiment, as shown in Figure 2As shown, the central angle a corresponding to the arc length of the locking arc 31 is 55°-75°, and the central angle β corresponding to the arc length of the releasing arc 32 is 25°-45°. The central angle a can be 55°, 60°, 65°, 70° or 75°, etc. When the central angle a is less than 55°, the contact area between the limiting ring 3 and the variable-diameter ring 4 when the coil 2 is in the assembly position is small, which is not conducive to the stable assembly of the shell 1 and the coil 2; when the central angle a is greater than 75°, the arc length of the locking arc 31 is too long. In the same diameter of the limiting ring 3, the number of locking arcs 31 is small, which reduces the contact point position of the limiting ring 3 and the variable-diameter ring 4 when the coil 2 is in the assembly position, which is not conducive to the stable assembly of the shell 1 and the coil 2. The central angle β can be 25°, 30°, 35°, 40° or 45°, etc. When the central angle β is less than 25°, the arc length of the releasing arc 32 is too short, which increases the distance between the locking arc 31 and the releasing arc 32, thereby increasing the rotation angle when the coil 2 is disassembled. When the central angle β is greater than 45°, the arc length of the releasing arc 32 is too long, which limits the arc length of the locking arc 31 in the same diameter of the limiting ring 3, which is not conducive to the stable assembly of the shell 1 and the coil 2.

[0041] As shown in Figure 2 and Figure 3 The inner side of the limiting ring 3 is also provided with a guide surface 33, and the adjacent locking arc 31 and releasing arc 32 are both provided with a guide surface 33. In the adjacent locking arc 31 and releasing arc 32, one end of the guide surface 33 is connected with one end of the corresponding locking arc 31, and the other end of the guide surface 33 is connected with one end of the corresponding releasing arc 32. The adjacent locking arc 31 and releasing arc 32 are connected through the guide surface 33, and when the coil 2 is rotated from the assembly position to the disassembly position, the variable-diameter ring 4 is rotated from the locking arc 31 to the releasing arc 32 through the guide surface 33 to provide a guiding effect during the rotation of the variable-diameter ring 4, thereby improving the smoothness and stability of the rotation process of the variable-diameter ring 4.

[0042] Further, the guide surface 33 is smoothly connected with the adjacent locking arc 31 and releasing arc 32, respectively. Specifically, one end of the guide surface 33 and one end of the corresponding locking arc 31, and the other end of the guide surface 33 and one end of the corresponding releasing arc 32 are all connected through a round corner transition, so that the variable-diameter ring 4 can smoothly slide into or out of the guide surface 33, and the variable-diameter ring 4 is prevented from being stuck or greatly worn during the rotation process.

[0043] The limiting ring 3 of the present embodiment is separately provided with the shell 1, which facilitates the processing of the limiting ring 3. As shown in Figure 1 and Figure 2As shown, the variable-diameter ring 4 comprises alternating flange portions 41 and flat portions 42. The outer periphery of the coil 2 is provided with a second mounting groove 21 in the circumferential direction, the variable-diameter ring 4 is elastically sleeved in the second mounting groove 21, the flat portion 42 is located in the second mounting groove 21, and the flange portion 41 protrudes out of the second mounting groove 21 and protrudes out of the outer peripheral surface of the coil 2. When the coil 2 is in the assembled position, the flange portion 41 abuts against the locking arc 31; when the coil 2 is in the disassembled position, the flange portion 41 abuts against the release arc 32. By sleeving the variable-diameter ring 4 in the second mounting groove 21, the stable installation of the variable-diameter ring 4 is achieved.

[0044] It should be noted that the variable-diameter ring 4 of the present embodiment is an unclosed check ring, and the second mounting groove 21 has a fixing block arranged in the axial direction of the coil 2, and the two ends of the variable-diameter ring 4 abut against the fixing block respectively, so as to realize the circumferential limiting of the variable-diameter ring 4, avoid the rotation of the variable-diameter ring 4 in the second mounting groove 21 relative to the coil 2, and ensure the synchronous rotation of the coil 2 and the variable-diameter ring 4.

[0045] The variable-diameter ring 4 of the present embodiment has three flange portions 41 and three flat portions 42 connected alternately, so as to make the variable-diameter ring 4 substantially triangular. The flange portion 41 abuts against the locking arc 31 in the assembled position and abuts against the release arc 32 in the disassembled position. The flange portion 41 is in the form of a circular arc, and the flange portion 41 is concentrically arranged with the locking arc 31 and the release arc 32, so as to realize that the flange portion 41 can be in close contact with and abut against the locking arc 31 and the release arc 32, and improve the abutting area of the flange portion 41 and the locking arc 31 and the release arc 32. The flat portion 42 is arranged in a spaced manner with the inner side of the limiting ring 3, i.e. the flat portion 42 does not contact the limiting ring 3, which reduces the friction force in the rotation process of the variable-diameter ring 4, improves the smoothness and stability in the rotation process of the variable-diameter ring 4, and avoids the jamming and large wear of the variable-diameter ring 4.

[0046] Further, a round corner structure is arranged between adjacent flange portions 41 and flat portions 42, so that the variable-diameter ring 4 is integrally formed by bending, which reduces the processing difficulty and processing cost of the variable-diameter ring 4.

[0047] Embodiment Two

[0048] As shown in the drawings, Figure 4 The present embodiment proposes an electromagnet, which has basically the same structure as the electromagnet in Embodiment One, and the main difference lies in that the limiting ring 3 of the present embodiment is integrally formed with the shell 1. Specifically, the inner side wall of the inner hole 11 is integrally provided with the limiting ring 3, i.e. the inner side wall of the inner hole 11 is alternately provided with the locking arc 31 and the release arc 32 in the circumferential direction, so that the limiting ring 3 is integrally formed with the shell 1, and the assembly steps of the limiting ring 3 are reduced.

[0049] The above embodiments only illustrate the basic principles and characteristics of the present application, and the present application is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of the present application, and these changes and modifications all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An electromagnet, characterized in that, The device includes a housing (1), a coil (2), a limiting ring (3), and an unclosed variable diameter ring (4). The housing (1) has an inner hole (11), and the limiting ring (3) is disposed in the inner hole (11). The inner side of the limiting ring (3) is alternately provided with a locking arc (31) and a release arc (32) along the circumferential direction. The diameters of the locking arc (31), the inner hole (11), and the release arc (32) decrease sequentially. The variable diameter ring (4) is elastically fitted onto the outer periphery of the coil (2). The coil (2) is inserted into the inner hole (11) and can rotate around the housing (1) to the assembly position and the disassembly position. When the coil (2) is in the assembly position, the outer ring of the variable diameter ring (4) abuts against the locking arc (31); when the coil (2) is in the disassembly position, the outer ring of the variable diameter ring (4) abuts against the release arc (32).

2. The electromagnet according to claim 1, characterized in that, The inner wall of the inner hole (11) is provided with a first mounting groove (111) along the circumferential direction, and the limiting ring (3) is installed in the first mounting groove (111); the locking arc (31) is located in the first mounting groove (111), and the release arc (32) extends out of the first mounting groove (111) and protrudes from the inner wall of the inner hole (11).

3. The electromagnet according to claim 2, characterized in that, The inner side of the limiting ring (3) is also provided with a guide surface (33), and a guide surface (33) is provided between the adjacent locking arc (31) and the release arc (32); In adjacent locking arcs (31) and releasing arcs (32), one end of the guide surface (33) is connected to one end of the corresponding locking arc (31), and the other end of the guide surface (33) is connected to one end of the corresponding releasing arc (32).

4. The electromagnet according to claim 3, characterized in that, The guide surface (33) is smoothly connected to the adjacent locking arc (31) and release arc (32).

5. The electromagnet according to claim 2, characterized in that, The limiting ring (3) is an unclosed ring, and the outer circumferential surface of the limiting ring (3) elastically presses against the bottom wall of the first mounting groove (111).

6. The electromagnet according to claim 5, characterized in that, The limiting ring (3) has a first end (34) and a second end (35) spaced apart. The limiting ring (3) has two through holes (36) which are respectively adjacent to the first end (34) and the second end (35).

7. The electromagnet according to claim 1, characterized in that, The locking arc (31) and the releasing arc (32) are concentrically arranged, and the arc length of the locking arc (31) is greater than the arc length of the releasing arc (32).

8. The electromagnet according to claim 7, characterized in that, The central angle α corresponding to the arc length of the locking arc (31) is 55° to 75°, and the central angle β corresponding to the arc length of the releasing arc (32) is 25° to 45°.

9. The electromagnet according to any one of claims 1 to 8, characterized in that, The limiting ring (3) is integrally provided on the inner sidewall of the inner hole (11).

10. The electromagnet according to any one of claims 1 to 8, characterized in that, The variable diameter ring (4) includes alternating flange portions (41) and straight portions (42); a second mounting groove (21) is provided circumferentially on the outer periphery of the coil (2), the variable diameter ring (4) is elastically fitted into the second mounting groove (21), the straight portion (42) is located in the second mounting groove (21), and the flange portion (41) extends out of the second mounting groove (21) and protrudes from the outer periphery of the coil (2); When the coil (2) is in the assembled position, the flange (41) abuts against the locking arc (31); when the coil (2) is in the disassembled position, the flange (41) abuts against the release arc (32).

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