Coupling with magnetic adsorption and use method

Abstract

The invention belongs to the technical field of engineering elements, and particularly relates to a coupler, in particular to a coupler with a magnetic adsorption function and a using method. The invention provides a coupler with magnetic adsorption, which comprises a coupler body, two ends of which are respectively sleeved on the outer walls of two transmission shafts, and which is made of a non-magnetic material; the bolt rod is in threaded connection with the device body and is made of a magnetic material; the at least two magnetic pieces are arranged in the device body, and the two magnetic pieces are oppositely arranged on the two sides of a threaded hole matched with the bolt rod so as to generate a coupling magnetic field which penetrates through the threaded hole and is used for adsorbing and locking the bolt rod; a plurality of decoupling grooves are formed in the device body and located between the threaded hole and the magnetic piece, and when the magnetic field shielding piece is inserted into the decoupling grooves, the coupling magnetic field is shielded, so that the bolt rod is unlocked; through cooperation of the magnetic part, the magnetic field shielding part and the bolt rod, the bolt rod is magnetically attracted by the magnetic part in the assembling process, and the fastening effect of the bolt rod on the device body is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of engineering components, and specifically relates to a coupling, and in particular to a coupling with magnetic adsorption and a use method thereof. Background Art

[0002] A coupling is a device that connects two shafts or a shaft and a rotating part, and rotates together during the transmission of motion and power, and does not disengage under normal circumstances. Sometimes it is also used as a safety device to prevent the connected parts from being subjected to excessive loads, playing the role of overload protection.

[0003] In the related art, the coupling is usually fastened by bolts, and in order to prevent the bolts from loosening when the coupling is rotated, glue is often applied to the outer wall of the bolts during assembly to improve the stability of the bolts and the coupling. However, after applying glue, the bolts are not easy to remove from the coupling when the coupling is disassembled.

[0004] Therefore, how to solve the inconvenience of removing the existing bolts from the coupling is a technical problem that urgently needs to be solved in the field.

[0005] It should be noted that the above information disclosed in this background technology section is only used to understand the background technology of the present application concept, and therefore, the above description is not considered to constitute information of the prior art. Summary of the invention

[0006] The disclosed embodiments at least provide a coupling with magnetic adsorption and a working method thereof.

[0007] In a first aspect, an embodiment of the present disclosure provides a coupling with magnetic adsorption, comprising: The two ends of the device body are respectively sleeved on the outer walls of the two transmission shafts and are made of non-magnetic material; A bolt rod, which is threadedly connected to the device body and is made of magnetic material; At least two magnetic members are arranged in the device body, and the two magnetic members are arranged oppositely on two sides of the threaded hole adapted to the bolt rod, so as to generate a coupling magnetic field for adsorbing and locking the bolt rod passing through the threaded hole; A plurality of decoupling grooves are arranged on the device body and are respectively located between the threaded holes and the magnetic parts. When the magnetic field shielding parts are inserted into the decoupling grooves, the coupling magnetic field is shielded to unlock the bolt rod.

[0008] In an optional embodiment, the device body is provided with a tightening groove in the radial direction so that the device body can be sleeved on the outer wall of the transmission shaft; The threaded hole is arranged along the radial direction of the device body, and the threaded hole and the tightening groove are perpendicular to each other; The bolt rod is screwed into the threaded hole to fix the device body on the outer wall of the transmission shaft.

[0009] In an optional embodiment, a receiving cavity is respectively provided on both sides of the threaded hole, and the receiving cavity and the threaded hole are parallel to each other; A magnetic component is correspondingly arranged in a receiving cavity, and the magnetic component and the bolt rod are parallel to each other.

[0010] In an optional embodiment, a decoupling groove is provided between the accommodating cavity and the threaded hole, the decoupling groove extends radially along the device body, and the magnetic field shielding member is suitable for being inserted into the decoupling groove; The magnetic field shielding component is inserted into the decoupling groove, and the magnetic field shielding component is suitable for isolating the magnetic attraction of the magnetic component to the bolt rod.

[0011] In an optional embodiment, an air passage is provided in the body of the device, and the air passage is adapted to connect the tightening groove and the accommodating cavity; When the device body rotates, the air passage is suitable for guiding the air at the end of the device body to flow toward the magnetic part.

[0012] In an optional embodiment, the magnetic field shielding member includes: an isolating member, which is "U"-shaped, and the isolating member is suitable for being inserted into the decoupling slot; A positioning piece is arranged on the side wall of the isolating member, and the positioning piece is suitable for being inserted into the tightening groove.

[0013] In an optional embodiment, there are two device bodies, and a diaphragm group is arranged between the two device bodies; The tightening grooves of the two device bodies are arranged perpendicularly to each other.

[0014] In an optional embodiment, one end of the tightening groove passes through the outer wall of the device body, and the other end of the tightening groove is arranged to extend beyond the transmission shaft.

[0015] In a second aspect, the embodiment of the present disclosure further provides a magnetic locking mechanism for a coupling, comprising: A magnetic field shielding member, which is detachably mounted on the coupling and magnetically compatible with the magnetic member in the coupling; The magnetic field shielding member is made of magnetic material; A bolt rod, which is threadedly connected to the coupling and is made of magnetic material; Wherein, when the bolt rod is spirally inserted into the coupling, the two magnetic members are suitable for magnetically limiting the bolt rod from both sides; The magnetic field shielding component is inserted into the decoupling groove on the coupling, and the magnetic field shielding component is suitable for isolating the magnetic attraction of the magnetic component to the bolt rod.

[0016] In an optional embodiment, The magnetic field shielding member comprises: an isolating member which is in a “U” shape and is suitable for being inserted into a decoupling slot; A positioning piece is arranged on the side wall of the isolating member, and the positioning piece is suitable for being inserted into the tightening groove.

[0017] In an optional embodiment, An air passage is provided in the body of the device, and the air passage is suitable for connecting the tightening groove and the accommodating cavity; When the device body rotates, the air passage is suitable for guiding the air at the end of the device body to flow toward the magnetic part.

[0018] In a third aspect, the present disclosure also provides a method for using a coupling, the method comprising: During assembly, the two ends of the device body are respectively sleeved on the outer walls of the two transmission shafts, the bolt rod is spirally inserted into the device body, and the two magnetic members are suitable for magnetically limiting the bolt rod from both sides; so as to improve the stability of the connection between the bolt rod and the device body; During disassembly, the magnetic field shielding member is inserted into the device body to isolate the magnetic attraction of the magnetic member to the bolt rod, and the bolt rod is rotated to separate it from the device body.

[0019] The beneficial effect of the present invention is that the coupling with magnetic adsorption and the use method of the present invention, through the arrangement of the magnetic parts, the bolt rod and the magnetic field shielding parts, when assembling and tightening, the magnetic parts magnetically adsorb the bolt rod from both sides to improve the stability of the tightening between the bolt rod and the device body, and avoid the bolt rod from detaching from the device body; and when disassembling, the magnetic field shielding part is inserted into the outer wall of the device body to isolate the magnetic force of the magnetic parts on the bolt rod, so as to facilitate the disassembly of the bolt rod.

[0020] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, this article specifically cites preferred embodiments and provides detailed descriptions as follows in conjunction with the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A three-dimensional diagram of a coupling with magnetic adsorption provided in an embodiment of the present disclosure; Figure 2 A schematic diagram of the bolt rod and the magnetic field shielding member in the expanded state provided in the embodiment of the present disclosure; Figure 3 A three-dimensional sectional view of the interior of the device body provided in an embodiment of the present disclosure.

[0024] In the figure: 1. Device body; 10. Tightening groove; 11. Threaded hole; 12. Decoupling groove; 13. Airway; 2. Bolt rod; 3. Magnetic part; 4. Magnetic field shielding part; 41. Isolation part; 42. Positioning piece; 5. Diaphragm assembly. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In this article, when it is mentioned that the first component is located on the second component, this may mean that the first component may be directly formed on the second component, or the third component may be interposed between the first component and the second component. In addition, in the drawings, in order to effectively describe the technical content, the thickness of the component may be exaggerated or reduced.

[0027] Herein, example embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as "at least one of..." modify the entire list of elements when following a list of elements, rather than modifying individual elements in the list. For example, the expression "at least one of a, b, and c" should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0028] The terms used herein are only used to describe specific exemplary configurations and are not intended to be limited. As used herein, the singular articles "one", "an" and "the" may also be intended to include plural forms, unless it is clearly indicated above that this is not the case. The terms "comprise", "include" and "have" are inclusive, and therefore specify the presence of features, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components and / or combinations thereof. The method steps, processes and operations described herein should not be interpreted as necessarily requiring them to be performed in the specific order discussed or shown, unless specifically identified as an execution order. Additional or alternative steps may be adopted.

[0029] As used herein, the phrases "in one embodiment," "according to one embodiment," "in some embodiments," and the like generally refer to the fact that the particular feature, structure, or characteristic following the phrase may be included in at least one embodiment of the present disclosure. Therefore, a particular feature, structure, or characteristic may be included in more than one embodiment of the present disclosure, so that these phrases do not necessarily refer to the same embodiment. As used herein, the terms "example," "exemplary," and the like are used to "serve as an example, instance, or illustration." Any implementation, aspect, or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. On the contrary, the use of the terms "example," "exemplary," and the like is intended to present concepts in a concrete manner.

[0030] The research found that the disadvantages of the prior art are: in the related art, the coupling is usually fastened by bolts, and in order to prevent the bolts from loosening when the coupling is rotated, glue is often applied to the outer wall of the bolts during assembly to improve the stability of the bolt and coupling. However, after applying glue, when disassembling the coupling, the bolts are not easy to remove from the coupling.

[0031] Therefore, how to solve the problem of the inconvenience of removing the existing bolts from the coupling is a technical problem that urgently needs to be solved in this field.

[0032] The defects existing in the above solutions are the results obtained by the inventor after practice and careful research. Therefore, the discovery process of the above problems and the solutions proposed by the present invention in this article for the above problems should be the contributions made by the inventor to the present invention during the disclosure process.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0034] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0035] like Figures 1 to 3As shown, some embodiments provide a coupling with magnetic adsorption, including: a coupling body 1, whose two ends are respectively set on the outer walls of two transmission shafts and are made of non-magnetic material; preferably, the coupling body 1 is made of aluminum alloy, and a fixing hole is provided at the axis of the coupling body 1, and the transmission shaft is suitable for inserting into the fixing hole. A bolt rod 2 is threadedly connected to the coupling body 1 and is made of magnetic material; the bolt rod 2 is threadedly adapted to the coupling body 1, and when the transmission shaft is inserted into the coupling body 1, the threaded rod is threadedly inserted into the coupling body 1 to fix the transmission shaft. At least two magnetic parts 3 are arranged in the coupling body 1, and the two magnetic parts 3 are relatively arranged on both sides of the threaded hole 11 adapted to the bolt rod 2; so as to generate a coupling magnetic field for adsorbing and locking the bolt rod 2 passing through the threaded hole 11; a plurality of decoupling grooves 12 are arranged on the coupling body 1, and are respectively located between the threaded hole 11 and the magnetic part 3, and when the magnetic field shielding part 4 is inserted into the decoupling groove 12, the coupling magnetic field is shielded to unlock the bolt rod 2. When the device body 1 is connected and fixed with two transmission shafts, the magnetic field shielding member 4 is not inserted into the device body 1. When the bolt rod 2 needs to be removed, the magnetic field shielding member 4 is inserted into the device body 1. Through the arrangement of the magnetic member 3, the bolt rod 2 and the magnetic field shielding member 4, during assembly and tightening, the magnetic member 3 magnetically adsorbs the bolt rod 2 from both sides to improve the stability of the tightening between the bolt rod 2 and the device body 1, and prevents the bolt rod 2 from detaching from the device body 1; and during disassembly, the magnetic field shielding member 4 is inserted into the outer wall of the device body 1 to isolate the magnetic force of the magnetic member 3 on the bolt rod 2, so as to facilitate the removal of the bolt rod 2. The arrangement of the air duct 13 can also supply air to cool the magnetic member 3, and prevent the magnetic member 3 from decreasing due to the increase in temperature.

[0036] Reference Figure 2 The device body 1 is provided with a tightening groove 10 along the radial direction, so that the device body 1 can be sleeved on the outer wall of the transmission shaft; one end of the tightening groove 10 passes through the outer wall of the device body 1, and the other end of the tightening groove 10 is arranged to extend over the transmission shaft. The setting of the tightening groove 10 allows the transmission shaft to be inserted into the fixing hole in the device body 1; and after the bolt rod 2 is inserted into the threaded hole 11, it is suitable for tightening the device body 1, so that the device body 1 and the transmission shaft are fixed more tightly. The threaded hole 11 is arranged along the radial direction of the device body 1, and the threaded hole 11 and the tightening groove 10 are perpendicular to each other; wherein, the bolt rod 2 is spirally inserted into the threaded hole 11 to fix the device body 1 to the outer wall of the transmission shaft.

[0037] Reference Figure 3, a receiving cavity is respectively provided on both sides of the threaded hole 11, and the receiving cavity is parallel to the threaded hole 11; a magnetic member 3 is correspondingly arranged in a receiving cavity, and the magnetic member 3 is parallel to the bolt rod 2. A gap is provided between the magnetic member 3 and the threaded hole 11, so that the isolation member 41 can be inserted between the threaded hole 11 and the magnetic member 3. The magnetic member 3 is a strong magnet. After the bolt rod 2 and the device body 1 are screwed together, the two magnetic members 3 magnetically limit the bolt rod 2 from both sides, which can prevent the bolt rod 2 from rotating on the one hand, and at the same time, prevent the bolt rod 2 from moving outward, thereby improving the stability of the fixation between the bolt rod 2 and the device body 1.

[0038] Furthermore, a decoupling groove 12 is provided between the accommodating cavity and the threaded hole 11, the decoupling groove 12 extends radially along the device body 1, and the magnetic field shielding member 4 is suitable for being inserted into the decoupling groove 12; the decoupling groove 12 is provided between the magnetic member 3 and the threaded hole 11. The magnetic field shielding member 4 is inserted into the decoupling groove 12, and the magnetic field shielding member 4 is suitable for isolating the magnetic attraction of the magnetic member 3 to the bolt rod 2.

[0039] Reference Figure 3 , an air passage 13 is provided in the device body 1, and the air passage 13 is suitable for connecting the tightening groove 10 with the accommodating cavity; the air inlet of the air passage 13 is located below the transmission shaft, and the air outlet of the air passage 13 is located above the transmission shaft. When the transmission shaft driver body 1 rotates circumferentially, the air at the end of the device body 1 flows into the air inlet of the air passage 13 along the tightening groove 10, and the air flows in the air passage 13 and blows toward the magnetic part 3 to cool it down, so as to avoid the situation that the temperature of the magnetic part 3 rises and the magnetism decreases. Among them, when the device body 1 rotates, the air passage 13 is suitable for guiding the air at the end of the device body 1 to flow toward the magnetic part 3.

[0040] Reference Figure 2 The magnetic field shielding member 4 includes: an isolating member 41, which is "U"-shaped and suitable for being inserted into the decoupling groove 12; a positioning piece 42, which is arranged on the side wall of the isolating member 41 and suitable for being inserted into the tightening groove 10. The isolating member 41 is suitable for being inserted into the decoupling groove 12 to isolate the magnetic force of the magnetic member 3 on the bolt rod 2. Further, the isolating member 41 is made of iron.

[0041] Furthermore, there are two device bodies 1, and a diaphragm group 5 is arranged between the two device bodies 1; the tightening grooves 10 of the two device bodies 1 are arranged perpendicular to each other.

[0042] Some embodiments provide a magnetic locking mechanism for a coupling, comprising: A magnetic field shielding member 4 is detachably mounted on the coupling and is magnetically compatible with the magnetic member 3 in the coupling; The magnetic field shielding member 4 is made of magnetic material; The bolt rod 2 is threadedly connected to the coupling and is made of magnetic material; When the bolt rod 2 is spirally inserted into the coupling, the two magnetic members 3 are suitable for magnetically limiting the bolt rod 2 from both sides; The magnetic field shielding member 4 is inserted into the decoupling groove 12 on the coupling, and the magnetic field shielding member 4 is suitable for isolating the magnetic attraction of the magnetic member 3 on the bolt rod 2 .

[0043] Furthermore, the magnetic field shielding member 4 comprises: an isolating member 41 which is in a “U” shape, and the isolating member 41 is suitable for being inserted into the decoupling slot 12; A positioning piece 42 is disposed on a side wall of the isolation member 41 , and the positioning piece 42 is suitable for being inserted into the tightening groove 10 .

[0044] Furthermore, an air passage 13 is provided in the device body 1, and the air passage 13 is suitable for connecting the tightening groove 10 with the accommodating cavity; When the device body 1 rotates, the air channel 13 is suitable for guiding the air at the end of the device body 1 to flow toward the magnetic component 3.

[0045] Some embodiments provide a method for using a coupling, the method comprising: During assembly, the two ends of the device body 1 are respectively sleeved on the outer walls of the two transmission shafts, the bolt rod 2 is spirally inserted into the device body 1, and the two magnetic members 3 are suitable for magnetically limiting the bolt rod 2 from both sides; so as to improve the stability of the connection between the bolt rod 2 and the device body 1; During disassembly, the magnetic field shielding member 4 is inserted into the device body 1 to isolate the magnetic attraction of the magnetic member 3 to the bolt rod 2 , and the bolt rod 2 is rotated to separate it from the device body 1 .

[0046] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention 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 understood as a limitation of the present invention. In addition, terms such as "first", "second" and other numerical terms do not imply an order or sequence when used in this document unless explicitly indicated above. Therefore, without departing from the teachings of the example embodiments, the first element, component, region, layer or section discussed above may be referred to as a second element, component, region, layer or section.

[0048] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A coupling with magnetic adsorption, characterized in that: include: The device body (1) has two ends respectively sleeved on the outer walls of the two transmission shafts and is made of non-magnetic material; A bolt rod (2) which is threadedly connected to the device body (1) and is made of magnetic material; At least two magnetic members (3) are arranged in the device body (1), and the two magnetic members (3) are arranged oppositely on two sides of a threaded hole (11) adapted to the bolt rod (2), so as to generate a coupling magnetic field for adsorbing and locking the bolt rod (2) passing through the threaded hole (11); A plurality of decoupling grooves (12) are provided on the device body (1) and are respectively located between the threaded hole (11) and the magnetic member (3); when the magnetic field shielding member (4) is inserted into the decoupling groove (12), the coupling magnetic field is shielded, so that the bolt rod (2) is unlocked.

2. The coupling with magnetic adsorption according to claim 1, characterized in that: The device body (1) is provided with a tightening groove (10) along the radial direction, so as to facilitate the device body (1) to be sleeved on the outer wall of the transmission shaft; The threaded hole (11) is arranged along the radial direction of the device body (1), and the threaded hole (11) and the tightening groove (10) are perpendicular to each other; The bolt rod (2) is screwed into the threaded hole (11) to fix the device body (1) to the outer wall of the transmission shaft.

3. The coupling with magnetic adsorption as claimed in claim 2, characterized in that: A receiving cavity is respectively provided on both sides of the threaded hole (11), and the receiving cavity and the threaded hole (11) are parallel to each other; A magnetic component (3) is correspondingly arranged in a receiving cavity, and the magnetic component (3) and the bolt rod (2) are parallel to each other.

4. The coupling with magnetic adsorption as claimed in claim 3, characterized in that: The decoupling groove (12) extends radially along the device body (1), and the magnetic field shielding member (4) is suitable for being inserted into the decoupling groove (12); The magnetic field shielding member (4) is inserted into the decoupling groove (12), and the magnetic field shielding member (4) is suitable for isolating the magnetic attraction of the magnetic member (3) on the bolt rod (2).

5. The coupling with magnetic adsorption as claimed in claim 3, characterized in that: An air passage (13) is provided in the device body (1), and the air passage (13) is suitable for connecting the tightening groove (10) and the accommodating cavity; When the device body (1) rotates, the air passage (13) is suitable for guiding the air at the end of the device body (1) to flow toward the magnetic member (3).

6. The coupling with magnetic adsorption as claimed in claim 2, characterized in that: The magnetic field shielding member (4) comprises: an isolating member (41) which is in a "U" shape, and the isolating member (41) is suitable for being inserted into the decoupling slot (12); A positioning piece (42) is arranged on a side wall of the isolation piece (41), and the positioning piece (42) is suitable for being inserted into the tightening groove (10).

7. The coupling with magnetic adsorption as claimed in claim 2, characterized in that: There are two device bodies (1), and a diaphragm group (5) is arranged between the two device bodies (1); The tightening grooves (10) of the two device bodies (1) are arranged perpendicular to each other.

8. The coupling with magnetic adsorption as claimed in claim 2, characterized in that: One end of the tightening groove (10) passes through the outer wall of the device body (1), and the other end of the tightening groove (10) is arranged to extend beyond the transmission shaft.

9. A magnetic locking mechanism for a coupling, characterized in that: include: A magnetic field shielding member (4) which is detachably mounted on the coupling and is magnetically compatible with the magnetic member (3) in the coupling; The magnetic field shielding element (4) is made of magnetic material; A bolt rod (2) which is threadedly connected to the coupling and is made of magnetic material; Wherein, when the bolt rod (2) is spirally inserted into the coupling, the two magnetic members (3) are suitable for magnetically limiting the bolt rod (2) from both sides; The magnetic field shielding member (4) is inserted into the decoupling groove (12) on the coupling, and the magnetic field shielding member (4) is suitable for isolating the magnetic attraction of the magnetic member (3) on the bolt rod (2).

10. The magnetic locking mechanism for a coupling according to claim 9, characterized in that: The magnetic field shielding member (4) comprises: an isolating member (41) which is in a "U" shape, and the isolating member (41) is suitable for being inserted into the decoupling slot (12); A positioning piece (42) is arranged on a side wall of the isolation piece (41), and the positioning piece (42) is suitable for being inserted into the tightening groove (10).

11. The magnetic locking mechanism for a coupling according to claim 10, characterized in that: An air passage (13) is provided in the device body (1), and the air passage (13) is suitable for connecting the tightening groove (10) and the accommodating cavity; When the device body (1) rotates, the air passage (13) is suitable for guiding the air at the end of the device body (1) to flow toward the magnetic member (3).

12. A method for using a coupling, characterized in that: Using the coupling with magnetic adsorption as described in any one of claims 1 to 8, the method of using includes: During assembly, the two ends of the device body (1) are respectively sleeved on the outer walls of the two transmission shafts, the bolt rod (2) is spirally inserted into the device body (1), and the two magnetic members (3) are suitable for magnetically limiting the bolt rod (2) from both sides, so as to improve the stability of the connection between the bolt rod (2) and the device body (1); During disassembly, the magnetic field shielding member (4) is inserted into the device body (1) to isolate the magnetic attraction of the magnetic member (3) on the bolt rod (2), and the bolt rod (2) is rotated to separate it from the device body (1).

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